/* ═══════════════════════════════════════════════════════════════════════════
   NEWTON SUPERCOMPUTER - Claude-esque + Apple HIG 2026 Design System
   Jared Lewis Conglomerate
   © 2026 Jared Lewis · Last Updated: January 6, 2026
   ═══════════════════════════════════════════════════════════════════════════ */

/* ─────────────────────────────────────────────────────────────────────────────
   Design Tokens - Claude-esque Warmth + Apple Refinement
   ───────────────────────────────────────────────────────────────────────────── */

:root {
    /* Surface Colors - Warm Dark Theme */
    --surface-primary: #0d0d0d;
    --surface-secondary: #161616;
    --surface-tertiary: #1e1e1e;
    --surface-elevated: #252525;
    --surface-overlay: rgba(30, 30, 30, 0.95);

    /* Warm Accent Colors - Claude Palette */
    --accent-primary: #da7756;
    --accent-primary-hover: #e8937a;
    --accent-secondary: #c75b39;
    --accent-glow: rgba(218, 119, 86, 0.3);
    --accent-dim: rgba(218, 119, 86, 0.12);

    /* Newton Teal - Verification */
    --newton-primary: #4ecdc4;
    --newton-secondary: #3bb8b0;
    --newton-glow: rgba(78, 205, 196, 0.35);
    --newton-dim: rgba(78, 205, 196, 0.12);

    /* Semantic Colors */
    --success: #34c759;
    --success-dim: rgba(52, 199, 89, 0.15);
    --warning: #ffcc00;
    --warning-dim: rgba(255, 204, 0, 0.15);
    --error: #ff3b30;
    --error-dim: rgba(255, 59, 48, 0.15);
    --info: #5ac8fa;
    --info-dim: rgba(90, 200, 250, 0.15);

    /* Text Colors */
    --text-primary: #fafafa;
    --text-secondary: rgba(250, 250, 250, 0.7);
    --text-tertiary: rgba(250, 250, 250, 0.45);
    --text-quaternary: rgba(250, 250, 250, 0.25);

    /* Borders & Separators */
    --border-primary: rgba(255, 255, 255, 0.08);
    --border-secondary: rgba(255, 255, 255, 0.04);
    --border-focus: var(--accent-primary);

    /* Typography - Apple SF Pro */
    --font-sans: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'SF Pro Text', 'Inter', system-ui, sans-serif;
    --font-mono: 'SF Mono', 'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;

    /* Spacing Scale - 4px base */
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 20px;
    --space-6: 24px;
    --space-7: 32px;
    --space-8: 40px;
    --space-9: 48px;
    --space-10: 64px;
    --space-11: 80px;
    --space-12: 96px;

    /* Border Radius */
    --radius-xs: 6px;
    --radius-sm: 10px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --radius-2xl: 36px;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.4);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.6);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.7);
    --shadow-glow: 0 0 40px var(--accent-glow);
    --shadow-newton: 0 0 30px var(--newton-glow);

    /* Glass Effect */
    --glass-bg: rgba(30, 30, 30, 0.7);
    --glass-border: rgba(255, 255, 255, 0.06);
    --glass-blur: 24px;

    /* Transitions - Apple-style */
    --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-in-out-expo: cubic-bezier(0.87, 0, 0.13, 1);
    --duration-fast: 150ms;
    --duration-normal: 250ms;
    --duration-slow: 400ms;
    --duration-slower: 600ms;

    /* Layout */
    --nav-height: 72px;
    --max-width: 1280px;
    --content-width: 800px;
}

/* ─────────────────────────────────────────────────────────────────────────────
   Dark Mode Support (Automatic System Preference Detection)
   ───────────────────────────────────────────────────────────────────────────── */

@media (prefers-color-scheme: light) {
    :root {
        /* Surface Colors - Light Theme */
        --surface-primary: #ffffff;
        --surface-secondary: #f8f9fa;
        --surface-tertiary: #f0f1f3;
        --surface-elevated: #e8e9ec;
        --surface-overlay: rgba(248, 249, 250, 0.95);

        /* Text Colors - Light Theme */
        --text-primary: #0d0d0d;
        --text-secondary: rgba(13, 13, 13, 0.7);
        --text-tertiary: rgba(13, 13, 13, 0.5);
        --text-quaternary: rgba(13, 13, 13, 0.3);

        /* Borders - Light Theme */
        --border-primary: rgba(0, 0, 0, 0.08);
        --border-secondary: rgba(0, 0, 0, 0.04);

        /* Shadows - Light Theme */
        --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.1);
        --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.12);
        --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.15);
        --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.18);
        --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.2);

        /* Glass Effect - Light */
        --glass-bg: rgba(255, 255, 255, 0.7);
        --glass-border: rgba(0, 0, 0, 0.08);
    }
}

/* ─────────────────────────────────────────────────────────────────────────────
   CSS Reset & Base
   ───────────────────────────────────────────────────────────────────────────── */

*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background: var(--surface-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

/* Animated Gradient Background */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(ellipse 80% 50% at 20% 40%, rgba(218, 119, 86, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse 60% 60% at 80% 20%, rgba(78, 205, 196, 0.06) 0%, transparent 50%),
        radial-gradient(ellipse 50% 50% at 50% 90%, rgba(218, 119, 86, 0.05) 0%, transparent 50%);
    pointer-events: none;
    z-index: -1;
}

::selection {
    background: var(--accent-primary);
    color: var(--surface-primary);
}

a {
    color: var(--accent-primary);
    text-decoration: none;
    transition: color var(--duration-fast) var(--ease-out-expo);
}

a:hover {
    color: var(--accent-primary-hover);
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
    color: inherit;
}

input, textarea, select {
    font-family: inherit;
    font-size: inherit;
    color: inherit;
}

code, pre {
    font-family: var(--font-mono);
}

/* Focus Styles */
:focus-visible {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
}

/* ─────────────────────────────────────────────────────────────────────────────
   App Layout
   ───────────────────────────────────────────────────────────────────────────── */

#app {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.main-content {
    flex: 1;
    padding-top: calc(var(--nav-height) + var(--space-8));
    padding-bottom: var(--space-12);
}

/* ─────────────────────────────────────────────────────────────────────────────
   Navigation Bar - Glass Effect
   ───────────────────────────────────────────────────────────────────────────── */

.nav-bar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    background: var(--glass-bg);
    backdrop-filter: saturate(180%) blur(var(--glass-blur));
    -webkit-backdrop-filter: saturate(180%) blur(var(--glass-blur));
    border-bottom: 1px solid var(--glass-border);
    z-index: 100;
    transition: background var(--duration-normal) var(--ease-out-expo);
}

.nav-content {
    max-width: var(--max-width);
    height: 100%;
    margin: 0 auto;
    padding: 0 var(--space-6);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* Brand */
.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.brand-mark {
    width: 42px;
    height: 42px;
    background: linear-gradient(135deg, var(--newton-primary) 0%, var(--newton-secondary) 100%);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-mono);
    font-weight: 800;
    font-size: 20px;
    color: var(--surface-primary);
    box-shadow: var(--shadow-newton);
    transition: transform var(--duration-normal) var(--ease-out-expo),
                box-shadow var(--duration-normal) var(--ease-out-expo);
}

.brand-mark:hover {
    transform: scale(1.05);
    box-shadow: 0 0 50px var(--newton-glow);
}

.brand-mark.small {
    width: 28px;
    height: 28px;
    font-size: 14px;
    box-shadow: none;
}

.brand-text {
    display: flex;
    flex-direction: column;
}

.brand-name {
    font-size: 20px;
    font-weight: 700;
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--text-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.brand-tagline {
    font-size: 11px;
    font-weight: 500;
    color: var(--text-tertiary);
    letter-spacing: 0.02em;
}

/* Navigation Tabs */
.nav-tabs {
    display: flex;
    gap: var(--space-1);
    background: var(--surface-secondary);
    padding: 4px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-primary);
}

.nav-tab {
    position: relative;
    padding: 10px 20px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    transition: all var(--duration-fast) var(--ease-out-expo);
}

.nav-tab:hover {
    color: var(--text-primary);
    background: var(--surface-tertiary);
}

.nav-tab.active {
    color: var(--text-primary);
    background: var(--surface-elevated);
    box-shadow: var(--shadow-sm);
}

/* Status Indicator */
.nav-status {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.status-indicator {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--text-quaternary);
    transition: all var(--duration-normal) var(--ease-out-expo);
}

.status-indicator.online {
    background: var(--success);
    box-shadow: 0 0 12px var(--success);
    animation: pulse 2.5s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.6; transform: scale(0.95); }
}

.invariant {
    font-family: var(--font-mono);
    font-size: 13px;
    font-weight: 500;
    color: var(--newton-primary);
    padding: 6px 12px;
    background: var(--newton-dim);
    border-radius: var(--radius-xs);
    border: 1px solid rgba(78, 205, 196, 0.2);
}

/* ─────────────────────────────────────────────────────────────────────────────
   Views
   ───────────────────────────────────────────────────────────────────────────── */

.view {
    display: none;
    opacity: 0;
    transform: translateY(12px);
    animation: viewEnter var(--duration-slow) var(--ease-out-expo) forwards;
}

.view.active {
    display: block;
}

@keyframes viewEnter {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.view-container {
    max-width: var(--content-width);
    margin: 0 auto;
    padding: 0 var(--space-6);
}

/* ─────────────────────────────────────────────────────────────────────────────
   Hero Section - Claude Warmth
   ───────────────────────────────────────────────────────────────────────────── */

.hero-section {
    text-align: center;
    margin-bottom: var(--space-10);
    padding: var(--space-8) 0;
}

.hero-title {
    font-size: clamp(36px, 6vw, 56px);
    font-weight: 800;
    letter-spacing: -0.035em;
    line-height: 1.1;
    margin-bottom: var(--space-4);
    background: linear-gradient(135deg,
        var(--text-primary) 0%,
        var(--text-secondary) 50%,
        var(--accent-primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 18px;
    font-weight: 400;
    color: var(--text-secondary);
    max-width: 500px;
    margin: 0 auto;
    line-height: 1.6;
}

/* ─────────────────────────────────────────────────────────────────────────────
   Cards - Glass Morphism
   ───────────────────────────────────────────────────────────────────────────── */

.card {
    background: var(--surface-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    margin-bottom: var(--space-6);
    transition: all var(--duration-normal) var(--ease-out-expo);
}

.card:hover {
    border-color: var(--border-focus);
    box-shadow: var(--shadow-md);
}

.ask-card, .calculate-card, .constraint-builder, .test-section {
    background: var(--surface-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-xl);
    padding: var(--space-7);
    margin-bottom: var(--space-6);
    transition: all var(--duration-normal) var(--ease-out-expo);
}

.ask-card:hover, .calculate-card:hover {
    border-color: rgba(218, 119, 86, 0.3);
    box-shadow: 0 8px 32px rgba(218, 119, 86, 0.1);
}

/* ─────────────────────────────────────────────────────────────────────────────
   Input Fields - Refined
   ───────────────────────────────────────────────────────────────────────────── */

.input-group {
    margin-bottom: var(--space-5);
}

.input-field {
    width: 100%;
    padding: 14px 18px;
    background: var(--surface-tertiary);
    border: 1.5px solid var(--border-primary);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 16px;
    outline: none;
    transition: all var(--duration-fast) var(--ease-out-expo);
}

.input-field:hover {
    border-color: var(--border-secondary);
    background: var(--surface-elevated);
}

.input-field:focus {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 4px var(--accent-dim);
    background: var(--surface-elevated);
}

.input-field::placeholder {
    color: var(--text-tertiary);
}

.input-field.large {
    font-size: 18px;
    padding: 18px 22px;
}

.input-small {
    width: 100%;
    padding: 10px 14px;
    background: var(--surface-tertiary);
    border: 1.5px solid var(--border-primary);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 14px;
    font-family: var(--font-mono);
    outline: none;
    transition: all var(--duration-fast) var(--ease-out-expo);
}

.input-small:focus {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px var(--accent-dim);
}

textarea.input-field {
    resize: vertical;
    min-height: 120px;
    line-height: 1.6;
}

/* ─────────────────────────────────────────────────────────────────────────────
   Code Editor - Monospace Beauty
   ───────────────────────────────────────────────────────────────────────────── */

.code-editor {
    width: 100%;
    padding: 18px 20px;
    background: var(--surface-primary);
    border: 1.5px solid var(--border-primary);
    border-radius: var(--radius-md);
    color: var(--newton-primary);
    font-family: var(--font-mono);
    font-size: 14px;
    line-height: 1.7;
    resize: vertical;
    outline: none;
    transition: all var(--duration-fast) var(--ease-out-expo);
}

.code-editor:focus {
    border-color: var(--newton-primary);
    box-shadow: 0 0 0 4px var(--newton-dim);
}

.code-editor::placeholder {
    color: var(--text-tertiary);
}

.editor-section {
    margin-bottom: var(--space-6);
}

.editor-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-3);
}

.editor-label {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

/* ─────────────────────────────────────────────────────────────────────────────
   Buttons - Claude Style
   ───────────────────────────────────────────────────────────────────────────── */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: 14px 28px;
    font-size: 15px;
    font-weight: 600;
    border-radius: var(--radius-md);
    transition: all var(--duration-fast) var(--ease-out-expo);
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(255,255,255,0.1) 0%, transparent 50%);
    opacity: 0;
    transition: opacity var(--duration-fast);
}

.btn:hover::before {
    opacity: 1;
}

.btn.primary {
    background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
    color: white;
    box-shadow: var(--shadow-sm);
}

.btn.primary:hover {
    box-shadow: var(--shadow-glow);
    transform: translateY(-2px);
}

.btn.primary:active {
    transform: translateY(0);
    box-shadow: var(--shadow-xs);
}

.btn.secondary {
    background: var(--surface-tertiary);
    color: var(--text-primary);
    border: 1.5px solid var(--border-primary);
}

.btn.secondary:hover {
    background: var(--surface-elevated);
    border-color: var(--accent-primary);
}

.btn.success {
    background: linear-gradient(135deg, var(--success) 0%, #2db84d 100%);
    color: white;
}

.btn.danger {
    background: linear-gradient(135deg, var(--error) 0%, #e02020 100%);
    color: white;
}

.btn-icon {
    width: 22px;
    height: 22px;
    background: rgba(0, 0, 0, 0.2);
    border-radius: var(--radius-xs);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-mono);
    font-size: 13px;
    font-weight: 800;
}

.btn-small {
    padding: 8px 14px;
    font-size: 13px;
    font-weight: 500;
    background: var(--surface-tertiary);
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-primary);
    transition: all var(--duration-fast) var(--ease-out-expo);
}

.btn-small:hover {
    color: var(--text-primary);
    background: var(--surface-elevated);
    border-color: var(--accent-primary);
}

.action-row {
    display: flex;
    justify-content: center;
    gap: var(--space-4);
    margin-top: var(--space-5);
}

/* ─────────────────────────────────────────────────────────────────────────────
   Result Panel - Glass Effect
   ───────────────────────────────────────────────────────────────────────────── */

.result-panel {
    background: var(--surface-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-xl);
    overflow: hidden;
    margin-bottom: var(--space-6);
    animation: resultEnter var(--duration-slow) var(--ease-out-expo);
}

@keyframes resultEnter {
    from {
        opacity: 0;
        transform: translateY(16px) scale(0.98);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.result-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-4) var(--space-6);
    background: var(--surface-tertiary);
    border-bottom: 1px solid var(--border-primary);
}

.result-meta {
    display: flex;
    gap: var(--space-4);
}

.meta-item {
    font-size: 13px;
    font-family: var(--font-mono);
    color: var(--text-tertiary);
    padding: 4px 10px;
    background: var(--surface-secondary);
    border-radius: var(--radius-xs);
}

.result-body {
    padding: var(--space-6);
}

.result-output {
    font-family: var(--font-mono);
    font-size: 14px;
    color: var(--text-primary);
    white-space: pre-wrap;
    word-break: break-word;
    line-height: 1.7;
}

.result-value {
    font-family: var(--font-mono);
    font-size: 36px;
    font-weight: 700;
    color: var(--newton-primary);
    text-align: center;
    text-shadow: 0 0 30px var(--newton-glow);
}

/* ─────────────────────────────────────────────────────────────────────────────
   Status Badge - Refined
   ───────────────────────────────────────────────────────────────────────────── */

.status-badge {
    display: inline-flex;
    align-items: center;
    padding: 6px 14px;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    border-radius: var(--radius-full);
    transition: all var(--duration-fast) var(--ease-out-expo);
}

.status-badge.verified, .status-badge.passed {
    background: var(--newton-dim);
    color: var(--newton-primary);
    border: 1px solid rgba(78, 205, 196, 0.3);
    box-shadow: 0 0 20px var(--newton-glow);
}

.status-badge.failed {
    background: var(--error-dim);
    color: var(--error);
    border: 1px solid rgba(255, 59, 48, 0.3);
}

.status-badge.pending {
    background: var(--warning-dim);
    color: var(--warning);
    border: 1px solid rgba(255, 204, 0, 0.3);
}

/* ─────────────────────────────────────────────────────────────────────────────
   Capabilities Section
   ───────────────────────────────────────────────────────────────────────────── */

.capabilities-section {
    margin-top: var(--space-12);
}

.section-title {
    font-size: 28px;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: var(--space-7);
    text-align: center;
    color: var(--text-primary);
}

.capability-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-6);
}

.capability-card {
    background: var(--surface-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-xl);
    padding: var(--space-6);
    transition: all var(--duration-normal) var(--ease-out-expo);
    position: relative;
    overflow: hidden;
}

.capability-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-primary), var(--newton-primary));
    opacity: 0;
    transition: opacity var(--duration-normal);
}

.capability-card:hover {
    border-color: var(--accent-primary);
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.capability-card:hover::before {
    opacity: 1;
}

.capability-icon {
    width: 52px;
    height: 52px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-mono);
    font-size: 24px;
    font-weight: 800;
    margin-bottom: var(--space-5);
    position: relative;
}

.capability-icon.generate {
    background: linear-gradient(135deg, #bf5af2 0%, #9945ff 100%);
    color: white;
    box-shadow: 0 0 25px rgba(191, 90, 242, 0.4);
}

.capability-icon.orchestrate {
    background: linear-gradient(135deg, #5ac8fa 0%, #007aff 100%);
    color: white;
    box-shadow: 0 0 25px rgba(90, 200, 250, 0.4);
}

.capability-icon.verify {
    background: linear-gradient(135deg, var(--newton-primary) 0%, var(--newton-secondary) 100%);
    color: var(--surface-primary);
    box-shadow: var(--shadow-newton);
}

.capability-card h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: var(--space-4);
    color: var(--text-primary);
}

.capability-list {
    list-style: none;
}

.capability-list li {
    padding: 10px 0;
    color: var(--text-secondary);
    font-size: 14px;
    border-bottom: 1px solid var(--border-secondary);
    transition: color var(--duration-fast);
}

.capability-list li:last-child {
    border-bottom: none;
}

.capability-card:hover .capability-list li {
    color: var(--text-primary);
}

/* ─────────────────────────────────────────────────────────────────────────────
   Bounds Section
   ───────────────────────────────────────────────────────────────────────────── */

.bounds-section {
    margin-bottom: var(--space-6);
    padding: var(--space-5);
    background: var(--surface-tertiary);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-secondary);
}

.bounds-title {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: var(--space-4);
}

.bounds-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-4);
}

.bound-item label {
    display: block;
    font-size: 11px;
    color: var(--text-tertiary);
    margin-bottom: var(--space-1);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ─────────────────────────────────────────────────────────────────────────────
   Operators Reference
   ───────────────────────────────────────────────────────────────────────────── */

.reference-section {
    margin-top: var(--space-10);
}

.operators-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: var(--space-4);
}

.operator-group {
    background: var(--surface-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-md);
    padding: var(--space-4);
    transition: all var(--duration-fast) var(--ease-out-expo);
}

.operator-group:hover {
    border-color: var(--newton-primary);
}

.operator-group h4 {
    font-size: 11px;
    font-weight: 600;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: var(--space-2);
}

.operator-group code {
    font-size: 13px;
    color: var(--newton-primary);
    word-break: break-all;
}

/* ─────────────────────────────────────────────────────────────────────────────
   Orchestrate View
   ───────────────────────────────────────────────────────────────────────────── */

.orchestrate-diagram {
    background: var(--surface-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-xl);
    padding: var(--space-8);
    margin-bottom: var(--space-6);
    overflow-x: auto;
}

.diagram-flow {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-5);
    min-width: 600px;
}

.flow-node {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-3);
}

.flow-node .node-icon {
    width: 72px;
    height: 72px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-mono);
    font-size: 26px;
    font-weight: 800;
    background: var(--surface-tertiary);
    border: 2px solid var(--border-primary);
    transition: all var(--duration-normal) var(--ease-out-expo);
}

.flow-node.external .node-icon {
    background: linear-gradient(135deg, #2d2d2d 0%, #3d3d3d 100%);
    border-color: #bf5af2;
    color: #bf5af2;
    box-shadow: 0 0 20px rgba(191, 90, 242, 0.2);
}

.flow-node.newton .node-icon {
    background: linear-gradient(135deg, var(--newton-primary) 0%, var(--newton-secondary) 100%);
    border-color: var(--newton-primary);
    color: var(--surface-primary);
    box-shadow: var(--shadow-newton);
}

.flow-node.constraint .node-icon {
    background: var(--surface-tertiary);
    border-color: var(--warning);
    color: var(--warning);
    box-shadow: 0 0 20px rgba(255, 204, 0, 0.2);
}

.flow-node.result .node-icon {
    background: var(--newton-dim);
    border-color: var(--newton-primary);
    color: var(--newton-primary);
    font-size: 14px;
}

.flow-node.result .node-icon.success {
    box-shadow: var(--shadow-newton);
}

.flow-node span {
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
}

.flow-arrow {
    width: 48px;
    height: 2px;
    background: linear-gradient(90deg, var(--border-primary), var(--newton-primary));
    position: relative;
}

.flow-arrow::after {
    content: '';
    position: absolute;
    right: -5px;
    top: -5px;
    width: 0;
    height: 0;
    border-left: 10px solid var(--newton-primary);
    border-top: 6px solid transparent;
    border-bottom: 6px solid transparent;
}

/* ─────────────────────────────────────────────────────────────────────────────
   Builder Form
   ───────────────────────────────────────────────────────────────────────────── */

.builder-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: var(--space-5);
    color: var(--text-primary);
}

.builder-form {
    display: grid;
    gap: var(--space-4);
}

.form-row {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.form-row label {
    font-size: 12px;
    font-weight: 500;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

select.input-field {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23fafafa' fill-opacity='0.5' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
    padding-right: 40px;
}

/* ─────────────────────────────────────────────────────────────────────────────
   Constraint List
   ───────────────────────────────────────────────────────────────────────────── */

.constraint-list {
    background: var(--surface-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-xl);
    padding: var(--space-6);
    margin-bottom: var(--space-6);
}

.constraint-list h4 {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: var(--space-4);
    color: var(--text-primary);
}

.constraints-empty {
    text-align: center;
    color: var(--text-tertiary);
    padding: var(--space-8);
    font-style: italic;
}

.constraint-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-3) var(--space-4);
    background: var(--surface-tertiary);
    border-radius: var(--radius-sm);
    margin-bottom: var(--space-2);
    font-family: var(--font-mono);
    font-size: 13px;
    border: 1px solid var(--border-secondary);
}

.constraint-item:last-child {
    margin-bottom: 0;
}

.constraint-item .remove-btn {
    color: var(--error);
    opacity: 0.6;
    font-size: 18px;
    transition: opacity var(--duration-fast);
}

.constraint-item .remove-btn:hover {
    opacity: 1;
}

/* ─────────────────────────────────────────────────────────────────────────────
   Ledger View
   ───────────────────────────────────────────────────────────────────────────── */

.ledger-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-6);
    margin-bottom: var(--space-6);
}

.stat-card {
    background: var(--surface-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-xl);
    padding: var(--space-7);
    text-align: center;
    transition: all var(--duration-normal) var(--ease-out-expo);
}

.stat-card:hover {
    border-color: var(--newton-primary);
    box-shadow: var(--shadow-md);
}

.stat-value {
    font-family: var(--font-mono);
    font-size: 40px;
    font-weight: 700;
    color: var(--newton-primary);
    margin-bottom: var(--space-2);
    text-shadow: 0 0 30px var(--newton-glow);
}

.stat-label {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.ledger-actions {
    display: flex;
    justify-content: center;
    gap: var(--space-4);
    margin-bottom: var(--space-6);
}

.ledger-entries {
    background: var(--surface-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-xl);
    min-height: 300px;
    overflow: hidden;
}

.ledger-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-12);
    color: var(--text-tertiary);
}

.ledger-empty .empty-icon {
    width: 72px;
    height: 72px;
    background: var(--surface-tertiary);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-mono);
    font-size: 28px;
    font-weight: 700;
    margin-bottom: var(--space-5);
    color: var(--text-quaternary);
}

.empty-hint {
    font-size: 14px;
    margin-top: var(--space-2);
}

.ledger-entry {
    padding: var(--space-4) var(--space-5);
    border-bottom: 1px solid var(--border-secondary);
    display: grid;
    grid-template-columns: auto 1fr auto auto;
    align-items: center;
    gap: var(--space-3);
    transition: background var(--duration-fast);
}

.ledger-entry:hover {
    background: var(--surface-tertiary);
}

.ledger-entry:last-child {
    border-bottom: none;
}

.entry-index {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--text-tertiary);
    min-width: 32px;
}

.entry-type {
    font-size: 9px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    padding: 4px 8px;
    background: var(--surface-tertiary);
    border-radius: var(--radius-xs);
    color: var(--text-secondary);
    white-space: nowrap;
}

.entry-hash {
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--newton-primary);
    overflow: hidden;
    text-overflow: ellipsis;
    display: none;
}

.entry-time {
    font-size: 11px;
    color: var(--text-tertiary);
    white-space: nowrap;
}

@media (min-width: 640px) {
    .ledger-entry {
        grid-template-columns: auto auto 1fr auto auto;
    }

    .entry-hash {
        display: block;
    }
}

/* ─────────────────────────────────────────────────────────────────────────────
   Voice Interface (MOAD)
   ───────────────────────────────────────────────────────────────────────────── */

.performance-dashboard {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-5);
    margin-bottom: var(--space-8);
}

.metric-card {
    background: var(--surface-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    text-align: center;
    transition: all var(--duration-normal) var(--ease-out-expo);
}

.metric-card:hover {
    border-color: var(--newton-primary);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.metric-value {
    font-family: var(--font-mono);
    font-size: 42px;
    font-weight: 800;
    color: var(--newton-primary);
    text-shadow: 0 0 20px var(--newton-glow);
    margin-bottom: var(--space-2);
}

.metric-value.speedup {
    background: linear-gradient(135deg, var(--accent-primary), var(--newton-primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.metric-label {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.voice-card {
    background: var(--surface-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-xl);
    padding: var(--space-7);
    margin-bottom: var(--space-6);
}

.voice-controls {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-4);
    margin-bottom: var(--space-6);
}

.btn-voice {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    border: 4px solid rgba(218, 119, 86, 0.3);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    cursor: pointer;
    transition: all var(--duration-normal) var(--ease-out-expo);
    box-shadow: 0 0 30px var(--accent-glow);
}

.btn-voice:hover {
    transform: scale(1.05);
    box-shadow: 0 0 50px var(--accent-glow);
}

.btn-voice:active {
    transform: scale(0.95);
    background: linear-gradient(135deg, var(--accent-secondary), var(--accent-primary));
}

.btn-voice.recording {
    animation: pulse-recording 1.5s ease-in-out infinite;
    background: linear-gradient(135deg, var(--error), #ff6b6b);
}

@keyframes pulse-recording {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); box-shadow: 0 0 60px rgba(255, 59, 48, 0.6); }
}

.voice-icon {
    font-size: 36px;
}

.voice-text {
    font-size: 12px;
    font-weight: 600;
    color: white;
}

.voice-status {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    padding: var(--space-2) var(--space-4);
    background: var(--surface-tertiary);
    border-radius: var(--radius-full);
}

.patterns-section {
    margin-top: var(--space-10);
}

.section-subtitle {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: var(--space-6);
    color: var(--text-primary);
}

.patterns-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-4);
}

.pattern-card {
    background: var(--surface-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-lg);
    padding: var(--space-5);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-2);
    cursor: pointer;
    transition: all var(--duration-fast) var(--ease-out-expo);
}

.pattern-card:hover {
    border-color: var(--accent-primary);
    background: var(--surface-tertiary);
    transform: translateY(-2px);
}

.pattern-icon {
    font-size: 32px;
    margin-bottom: var(--space-2);
}

.pattern-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
}

.pattern-desc {
    font-size: 12px;
    color: var(--text-tertiary);
    text-align: center;
}

.ratio-explanation {
    margin-top: var(--space-10);
    padding: var(--space-8);
    background: linear-gradient(135deg, var(--surface-secondary), var(--surface-tertiary));
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-primary);
}

.ratio-card {
    background: var(--surface-primary);
    border-radius: var(--radius-lg);
    padding: var(--space-7);
}

.ratio-visual {
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
    align-items: center;
}

.ratio-formula {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    font-family: var(--font-mono);
    font-size: 48px;
    font-weight: 700;
}

.formula-part {
    color: var(--newton-primary);
    text-shadow: 0 0 20px var(--newton-glow);
}

.formula-divider {
    color: var(--text-tertiary);
}

.formula-equals {
    color: var(--text-secondary);
    font-size: 36px;
}

.formula-result {
    color: var(--accent-primary);
    text-shadow: 0 0 20px var(--accent-glow);
}

.ratio-legend {
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.legend-item {
    padding: var(--space-4);
    background: var(--surface-secondary);
    border-radius: var(--radius-sm);
    border-left: 3px solid var(--newton-primary);
    font-size: 14px;
}

.legend-item.danger {
    border-left-color: var(--error);
    background: var(--error-dim);
}

.legend-item strong {
    font-family: var(--font-mono);
    color: var(--newton-primary);
}

.legend-item .dim {
    color: var(--text-tertiary);
    font-style: italic;
}

/* ─────────────────────────────────────────────────────────────────────────────
   f/g Ratio Demonstrator
   ───────────────────────────────────────────────────────────────────────────── */

.ratio-demo-section {
    margin-top: var(--space-10);
    padding: var(--space-7);
    background: linear-gradient(135deg, var(--surface-secondary), var(--surface-tertiary));
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-primary);
}

.demo-description {
    color: var(--text-secondary);
    margin-bottom: var(--space-6);
    font-size: 15px;
}

.ratio-demo-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-6);
}

.ratio-demo-card {
    background: var(--surface-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.ratio-demo-card h4 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-3);
}

.demo-inputs {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.demo-input-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}

.demo-input-group label {
    font-size: 12px;
    font-weight: 500;
    color: var(--text-secondary);
}

.demo-ratio {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-5);
    background: var(--surface-primary);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-secondary);
}

.ratio-value {
    font-family: var(--font-mono);
    font-size: 32px;
    font-weight: 700;
    color: var(--newton-primary);
    text-shadow: 0 0 20px var(--newton-glow);
}

.ratio-constraint {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.demo-status {
    display: flex;
    justify-content: center;
}

/* ─────────────────────────────────────────────────────────────────────────────
   Glass Box Panel
   ───────────────────────────────────────────────────────────────────────────── */

.glass-box-panel {
    margin: var(--space-10) 0;
    padding: var(--space-7);
    background: linear-gradient(135deg, var(--surface-secondary) 0%, var(--surface-tertiary) 100%);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-xl);
    position: relative;
    overflow: hidden;
}

.glass-box-panel::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--newton-primary), transparent);
}

.glass-box-panel h3 {
    margin: 0 0 var(--space-6) 0;
    font-size: 22px;
    font-weight: 700;
    color: var(--newton-primary);
}

.glass-box-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--space-5);
}

.glass-box-card {
    padding: var(--space-6);
    background: var(--surface-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-lg);
    text-align: center;
    transition: all var(--duration-normal) var(--ease-out-expo);
}

.glass-box-card:hover {
    border-color: var(--newton-primary);
    transform: translateY(-2px);
}

.glass-box-card h4 {
    margin: 0 0 var(--space-4) 0;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.glass-box-card .stat-value {
    font-size: 36px;
    margin: var(--space-4) 0;
}

.glass-box-card .btn {
    margin-top: var(--space-4);
    width: 100%;
}

.btn.small {
    padding: var(--space-2) var(--space-4);
    font-size: 13px;
}

/* ─────────────────────────────────────────────────────────────────────────────
   Footer - Jared Lewis Conglomerate Branding
   ───────────────────────────────────────────────────────────────────────────── */

.app-footer {
    background: var(--surface-secondary);
    border-top: 1px solid var(--border-primary);
    padding: var(--space-6) 0;
    margin-top: auto;
}

.footer-content {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-6);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.footer-brand-text {
    display: flex;
    flex-direction: column;
}

.footer-brand-name {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
}

.footer-brand-company {
    font-size: 11px;
    color: var(--text-tertiary);
    letter-spacing: 0.02em;
}

.footer-quote {
    font-size: 13px;
    color: var(--text-tertiary);
}

.footer-quote code {
    color: var(--newton-primary);
    font-size: 12px;
}

.footer-links {
    display: flex;
    align-items: center;
    gap: var(--space-5);
    font-size: 13px;
}

.footer-links a {
    color: var(--text-secondary);
    transition: color var(--duration-fast);
}

.footer-links a:hover {
    color: var(--accent-primary);
}

.footer-links .separator {
    color: var(--text-quaternary);
}

/* ─────────────────────────────────────────────────────────────────────────────
   Loading Overlay
   ───────────────────────────────────────────────────────────────────────────── */

.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(13, 13, 13, 0.9);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.loading-spinner {
    position: relative;
    width: 88px;
    height: 88px;
}

.spinner-ring {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border: 3px solid var(--surface-tertiary);
    border-top-color: var(--accent-primary);
    border-radius: 50%;
    animation: spin 1s cubic-bezier(0.5, 0, 0.5, 1) infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.spinner-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-family: var(--font-mono);
    font-size: 28px;
    font-weight: 800;
    color: var(--accent-primary);
}

/* ─────────────────────────────────────────────────────────────────────────────
   Modal
   ───────────────────────────────────────────────────────────────────────────── */

.modal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(8px);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal-overlay.show {
    display: flex;
}

.modal-content {
    width: 90%;
    max-width: 640px;
    max-height: 80vh;
    overflow-y: auto;
    padding: var(--space-8);
    background: var(--surface-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    animation: modalEnter var(--duration-slow) var(--ease-out-expo);
}

@keyframes modalEnter {
    from {
        opacity: 0;
        transform: scale(0.95) translateY(20px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-6);
}

.modal-header h3 {
    margin: 0;
    font-size: 22px;
    font-weight: 700;
}

.modal-close {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    font-size: 24px;
    border-radius: var(--radius-sm);
    transition: all var(--duration-fast);
}

.modal-close:hover {
    color: var(--text-primary);
    background: var(--surface-tertiary);
}

/* ─────────────────────────────────────────────────────────────────────────────
   Approval Request Cards
   ───────────────────────────────────────────────────────────────────────────── */

.approval-request {
    padding: var(--space-5);
    margin-bottom: var(--space-4);
    background: var(--surface-tertiary);
    border: 1px solid var(--border-primary);
    border-left: 4px solid var(--warning);
    border-radius: var(--radius-md);
}

.approval-request-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-3);
}

.approval-priority {
    padding: var(--space-1) var(--space-2);
    border-radius: var(--radius-xs);
    font-size: 10px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.approval-priority.high {
    background: var(--error-dim);
    color: var(--error);
}

.approval-priority.medium {
    background: var(--warning-dim);
    color: var(--warning);
}

.approval-priority.low {
    background: var(--surface-elevated);
    color: var(--text-secondary);
}

.approval-actions {
    display: flex;
    gap: var(--space-3);
    margin-top: var(--space-4);
}

.approval-actions .btn {
    flex: 1;
    padding: var(--space-3) var(--space-4);
}

/* ─────────────────────────────────────────────────────────────────────────────
   Notification
   ───────────────────────────────────────────────────────────────────────────── */

.notification {
    position: fixed;
    top: calc(var(--nav-height) + var(--space-4));
    right: var(--space-6);
    padding: var(--space-4) var(--space-6);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    z-index: 10000;
    animation: notificationEnter var(--duration-normal) var(--ease-out-expo);
}

@keyframes notificationEnter {
    from {
        opacity: 0;
        transform: translateX(20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes fadeOut {
    to {
        opacity: 0;
        transform: translateX(20px);
    }
}

/* ─────────────────────────────────────────────────────────────────────────────
   Responsive Design
   ───────────────────────────────────────────────────────────────────────────── */

@media (max-width: 768px) {
    :root {
        --nav-height: 64px;
    }

    .nav-content {
        padding: 0 var(--space-4);
    }

    .nav-tabs {
        display: none;
    }

    .brand-tagline {
        display: none;
    }

    .hero-title {
        font-size: 32px;
    }

    .hero-subtitle {
        font-size: 16px;
    }

    .view-container {
        padding: 0 var(--space-4);
    }

    .bounds-grid {
        grid-template-columns: 1fr;
    }

    .diagram-flow {
        flex-wrap: wrap;
        min-width: auto;
    }

    .app-footer {
        display: none;
    }

    .ledger-stats {
        grid-template-columns: 1fr;
        gap: var(--space-4);
    }

    .stat-card {
        padding: var(--space-5);
    }

    .stat-value {
        font-size: 32px;
    }

    .glass-box-panel {
        margin: var(--space-6) 0;
        padding: var(--space-5);
    }

    .glass-box-panel h3 {
        font-size: 18px;
        margin-bottom: var(--space-4);
    }

    .glass-box-card {
        padding: var(--space-4);
    }

    .glass-box-card .stat-value {
        font-size: 28px;
    }

    /* Mobile Navigation */
    .nav-tabs-mobile {
        display: flex;
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        background: var(--glass-bg);
        backdrop-filter: saturate(180%) blur(var(--glass-blur));
        border-top: 1px solid var(--glass-border);
        padding: var(--space-2);
        z-index: 100;
        padding-bottom: env(safe-area-inset-bottom, var(--space-2));
    }

    .nav-tabs-mobile .nav-tab {
        flex: 1;
        text-align: center;
        padding: var(--space-3) var(--space-2);
        font-size: 12px;
    }

    .main-content {
        padding-bottom: calc(100px + env(safe-area-inset-bottom, 0px));
    }

    .glass-box-grid {
        grid-template-columns: 1fr;
    }

    .modal-content {
        width: 95%;
        padding: var(--space-6);
    }

    .ledger-entries {
        min-height: 200px;
    }

    .export-proof-btn {
        padding: var(--space-1) var(--space-2);
        font-size: 10px;
    }
}

/* ─────────────────────────────────────────────────────────────────────────────
   Animations
   ───────────────────────────────────────────────────────────────────────────── */

.capability-card {
    animation: cardEnter var(--duration-slow) var(--ease-out-expo);
    animation-fill-mode: both;
}

.capability-card:nth-child(1) { animation-delay: 0.1s; }
.capability-card:nth-child(2) { animation-delay: 0.2s; }
.capability-card:nth-child(3) { animation-delay: 0.3s; }

@keyframes cardEnter {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Smooth scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--surface-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--surface-elevated);
    border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-quaternary);
}

/* Export Proof Button */
.export-proof-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    background: var(--surface-tertiary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-xs);
    color: var(--text-secondary);
    font-size: 12px;
    cursor: pointer;
    transition: all var(--duration-fast) var(--ease-out-expo);
}

.export-proof-btn:hover {
    background: var(--surface-elevated);
    border-color: var(--newton-primary);
    color: var(--newton-primary);
}

/* ─────────────────────────────────────────────────────────────────────────────
   Loading Skeletons
   ───────────────────────────────────────────────────────────────────────────── */

.skeleton {
    background: linear-gradient(
        90deg,
        var(--surface-tertiary) 0%,
        var(--surface-elevated) 50%,
        var(--surface-tertiary) 100%
    );
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s ease-in-out infinite;
    border-radius: var(--radius-sm);
}

@keyframes skeleton-loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

.skeleton-text {
    height: 16px;
    margin-bottom: var(--space-2);
}

.skeleton-title {
    height: 32px;
    width: 60%;
    margin-bottom: var(--space-4);
}

.skeleton-card {
    height: 200px;
    border-radius: var(--radius-lg);
}

/* ─────────────────────────────────────────────────────────────────────────────
   Print Stylesheet
   ───────────────────────────────────────────────────────────────────────────── */

@media print {
    /* Hide non-essential UI elements */
    .nav-bar,
    .loading-overlay,
    .btn,
    .action-row,
    .result-actions,
    .nav-tabs,
    .nav-status,
    .app-footer {
        display: none !important;
    }

    /* Reset colors for print */
    body {
        background: white;
        color: black;
    }

    .view-container {
        max-width: 100%;
        padding: 0;
    }

    .main-content {
        padding-top: 0;
    }

    /* Ensure content fits on page */
    .result-panel,
    .card,
    .capability-card {
        page-break-inside: avoid;
        border: 1px solid #ddd;
        background: white;
    }

    /* Print-friendly typography */
    .hero-title {
        color: black;
        font-size: 24pt;
    }

    .hero-subtitle {
        color: #333;
    }

    /* Print result outputs clearly */
    .result-output {
        font-size: 10pt;
        line-height: 1.4;
        color: black;
        white-space: pre-wrap;
        word-wrap: break-word;
    }

    /* Show page breaks */
    .view {
        page-break-before: always;
    }

    .view.active {
        page-break-before: avoid;
    }

    /* Print-friendly ledger entries */
    .ledger-entry {
        border-bottom: 1px solid #ddd;
        padding: 8pt 0;
    }

    /* Ensure monospace fonts work in print */
    code, pre, .font-mono {
        font-family: 'Courier New', monospace;
    }
}

/* ─────────────────────────────────────────────────────────────────────────────
   Accessibility Enhancements
   ───────────────────────────────────────────────────────────────────────────── */

/* Skip to main content link (for screen readers) */
.skip-to-main {
    position: absolute;
    top: -100px;
    left: 0;
    background: var(--accent-primary);
    color: white;
    padding: var(--space-3) var(--space-4);
    text-decoration: none;
    border-radius: var(--radius-sm);
    z-index: 10000;
}

.skip-to-main:focus {
    top: var(--space-4);
    left: var(--space-4);
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --border-primary: rgba(255, 255, 255, 0.3);
        --border-secondary: rgba(255, 255, 255, 0.15);
    }

    .btn {
        border: 2px solid currentColor;
    }

    .status-badge {
        border-width: 2px;
    }
}

/* ─────────────────────────────────────────────────────────────────────────────
   Beginner-Friendly Enhancements
   ───────────────────────────────────────────────────────────────────────────── */

/* Quick Examples Section */
.quick-examples {
    margin-bottom: var(--space-4);
    padding: var(--space-3);
    background: rgba(78, 205, 196, 0.1);
    border-radius: var(--radius-md);
    border: 1px solid rgba(78, 205, 196, 0.2);
}

.examples-label {
    display: block;
    font-size: var(--text-sm);
    color: var(--text-secondary);
    margin-bottom: var(--space-2);
    font-weight: 500;
}

.example-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
}

.example-btn {
    padding: var(--space-2) var(--space-3);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-full);
    color: var(--text-primary);
    font-size: var(--text-sm);
    cursor: pointer;
    transition: all 0.2s ease;
}

.example-btn:hover {
    background: var(--accent-primary);
    color: var(--bg-primary);
    border-color: var(--accent-primary);
    transform: translateY(-1px);
}

.example-btn:active {
    transform: translateY(0);
}

/* iPhone Shortcut CTA */
.shortcut-cta {
    display: flex;
    gap: var(--space-4);
    padding: var(--space-5);
    margin-top: var(--space-6);
    background: linear-gradient(135deg, rgba(78, 205, 196, 0.1) 0%, rgba(78, 205, 196, 0.05) 100%);
    border: 1px solid rgba(78, 205, 196, 0.2);
    border-radius: var(--radius-lg);
}

.cta-icon {
    font-size: 3rem;
    line-height: 1;
}

.cta-content h3 {
    margin: 0 0 var(--space-2) 0;
    font-size: var(--text-lg);
    color: var(--text-primary);
}

.cta-content p {
    margin: 0 0 var(--space-3) 0;
    color: var(--text-secondary);
}

.shortcut-instructions {
    font-size: var(--text-sm);
}

.shortcut-instructions summary {
    cursor: pointer;
    color: var(--accent-primary);
    font-weight: 500;
    padding: var(--space-2) 0;
}

.shortcut-instructions summary:hover {
    text-decoration: underline;
}

.shortcut-instructions ol {
    margin: var(--space-3) 0 0 0;
    padding-left: var(--space-5);
    color: var(--text-secondary);
}

.shortcut-instructions li {
    margin-bottom: var(--space-2);
    line-height: 1.6;
}

.shortcut-instructions ul {
    margin: var(--space-2) 0;
    padding-left: var(--space-4);
    list-style-type: disc;
}

.shortcut-instructions code {
    background: var(--bg-tertiary);
    padding: 2px 6px;
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-size: 0.9em;
}

/* Beginner-friendly capability cards */
.capability-card.beginner {
    text-align: center;
}

.capability-card.beginner .capability-icon {
    font-size: 2.5rem;
    background: none;
    width: auto;
    height: auto;
    margin-bottom: var(--space-3);
}

.capability-card.beginner h3 {
    margin-bottom: var(--space-3);
}

.capability-card.beginner .capability-list {
    text-align: left;
}

/* Mobile responsive for shortcuts CTA */
@media (max-width: 600px) {
    .shortcut-cta {
        flex-direction: column;
        text-align: center;
    }

    .cta-icon {
        font-size: 2.5rem;
    }

    .example-buttons {
        justify-content: center;
    }
}

/* ═══════════════════════════════════════════════════════════════════════════
   CLIPPER VIEW - Cohen-Sutherland Constraint Clipping
   ═══════════════════════════════════════════════════════════════════════════ */

.clip-status-display {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-8);
    margin-bottom: var(--space-6);
    padding: var(--space-6);
    background: var(--surface-secondary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-primary);
}

.traffic-light {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    padding: var(--space-4);
    background: var(--surface-primary);
    border-radius: var(--radius-md);
    border: 2px solid var(--border-primary);
}

.traffic-light .light {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    transition: all var(--duration-normal) var(--ease-out-expo);
}

.traffic-light .light.green {
    background: rgba(52, 199, 89, 0.2);
    border: 2px solid rgba(52, 199, 89, 0.3);
}

.traffic-light .light.green.active {
    background: var(--success);
    box-shadow: 0 0 20px var(--success), 0 0 40px rgba(52, 199, 89, 0.5);
}

.traffic-light .light.yellow {
    background: rgba(255, 204, 0, 0.2);
    border: 2px solid rgba(255, 204, 0, 0.3);
}

.traffic-light .light.yellow.active {
    background: var(--warning);
    box-shadow: 0 0 20px var(--warning), 0 0 40px rgba(255, 204, 0, 0.5);
}

.traffic-light .light.red {
    background: rgba(255, 59, 48, 0.2);
    border: 2px solid rgba(255, 59, 48, 0.3);
}

.traffic-light .light.red.active {
    background: var(--error);
    box-shadow: 0 0 20px var(--error), 0 0 40px rgba(255, 59, 48, 0.5);
}

.status-legend {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.legend-item {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.legend-item .dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.legend-item .dot.green { background: var(--success); }
.legend-item .dot.yellow { background: var(--warning); }
.legend-item .dot.red { background: var(--error); }

.clip-card {
    background: var(--surface-secondary);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    border: 1px solid var(--border-primary);
    margin-bottom: var(--space-6);
}

.clip-result .clip-sections {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.clip-section {
    padding: var(--space-4);
    background: var(--surface-tertiary);
    border-radius: var(--radius-md);
    border-left: 3px solid var(--border-primary);
}

.clip-section.original {
    border-left-color: var(--text-tertiary);
}

.clip-section.clipped {
    border-left-color: var(--newton-primary);
    background: var(--newton-dim);
}

.clip-section.boundary {
    border-left-color: var(--warning);
    background: var(--warning-dim);
}

.clip-section.suggestions {
    border-left-color: var(--info);
    background: var(--info-dim);
}

.clip-section h4 {
    margin: 0 0 var(--space-2) 0;
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
}

.clip-section p {
    margin: 0;
    line-height: 1.6;
}

.clip-section ul {
    margin: 0;
    padding-left: var(--space-4);
}

.clip-section li {
    margin: var(--space-1) 0;
}

.status-badge.warning {
    background: var(--warning-dim);
    color: var(--warning);
    border: 1px solid var(--warning);
}

.how-it-works {
    margin-top: var(--space-8);
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--space-4);
    margin-top: var(--space-4);
}

.step-card {
    background: var(--surface-secondary);
    border-radius: var(--radius-md);
    padding: var(--space-5);
    border: 1px solid var(--border-primary);
    position: relative;
}

.step-number {
    position: absolute;
    top: -12px;
    left: 16px;
    width: 28px;
    height: 28px;
    background: var(--newton-primary);
    color: var(--surface-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.9rem;
}

.step-card h3 {
    margin: var(--space-2) 0 var(--space-2) 0;
    font-size: 1rem;
    color: var(--text-primary);
}

.step-card p {
    margin: 0;
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

@media (max-width: 768px) {
    .clip-status-display {
        flex-direction: column;
        gap: var(--space-4);
    }

    .traffic-light {
        flex-direction: row;
    }

    .steps-grid {
        grid-template-columns: 1fr;
    }
}