/* ============================================================================
   AUTOMATA VISUALIZER - TECHNICAL LABORATORY AESTHETIC
   Inspired by: Oscilloscopes, CRT monitors, laboratory equipment
   ============================================================================ */

/* ============================================================================
   CSS VARIABLES & THEMING
   ============================================================================ */

:root {
    /* Technical Color Palette - Amber & Teal on Deep Navy */
    --primary: #FF9500;
    /* Amber/Orange - main accent */
    --primary-glow: rgba(255, 149, 0, 0.4);
    --primary-dim: #CC7700;

    --secondary: #00E5CC;
    /* Teal/Cyan - secondary accent */
    --secondary-glow: rgba(0, 229, 204, 0.4);
    --secondary-dim: #00B3A0;

    --accent: #FF00AA;
    /* Magenta - highlights */
    --accent-glow: rgba(255, 0, 170, 0.3);

    /* Base Colors */
    --bg: #0A0E27;
    /* Deep navy background */
    --bg-secondary: #151A38;
    /* Slightly lighter panels */
    --bg-tertiary: #1F2847;
    /* Hover states */

    --grid-color: rgba(0, 229, 204, 0.08);
    /* Oscilloscope grid */
    --grid-line: rgba(0, 229, 204, 0.15);

    /* Text */
    --text: #E8F4F8;
    /* Off-white */
    --text-secondary: #8BA8B4;
    /* Muted cyan-grey */
    --text-muted: #526873;
    /* Darker muted */
    --text-amber: #FFAA44;
    /* Amber text variant */

    /* Borders */
    --border: #2A3F52;
    --border-strong: #3D5A73;
    --border-glow: rgba(0, 229, 204, 0.3);

    /* State Colors */
    --success: #00FF88;
    --success-glow: rgba(0, 255, 136, 0.3);
    --warning: #FFAA00;
    --warning-glow: rgba(255, 170, 0, 0.3);
    --error: #FF3366;
    --error-glow: rgba(255, 51, 102, 0.3);

    /* Typography - Distinctive Fonts */
    --font-display: 'Syne', sans-serif;
    /* Headings */
    --font-body: 'Azeret Mono', monospace;
    /* Body text */
    --font-mono: 'Share Tech Mono', monospace;
    /* Code/mono */

    /* Visualization */
    --graph-bg: #050A1A;
    --node-fill: #151A38;
    --node-stroke: #00E5CC;
    --node-start: #FF9500;
    --node-accept: #00FF88;
    --edge-color: #526873;

    /* Effects */
    --glow-sm: 0 0 10px;
    --glow-md: 0 0 20px;
    --glow-lg: 0 0 30px;
    --scanline: repeating-linear-gradient(0deg,
            rgba(0, 0, 0, 0.15),
            rgba(0, 0, 0, 0.15) 1px,
            transparent 1px,
            transparent 2px);
}

/* Light Theme (Alternative - CRT Amber) */
[data-theme="light"] {
    --primary: #D97706;
    --primary-glow: rgba(217, 119, 6, 0.3);

    --secondary: #0891B2;
    --secondary-glow: rgba(8, 145, 178, 0.3);

    --bg: #FDF6E3;
    /* Warm cream background */
    --bg-secondary: #F5EDDC;
    --bg-tertiary: #EBE3D5;

    --text: #1F2937;
    --text-secondary: #6B7280;
    --text-muted: #9CA3AF;

    --border: #D1D5DB;
    --border-strong: #9CA3AF;

    --grid-color: rgba(217, 119, 6, 0.05);
    --grid-line: rgba(217, 119, 6, 0.1);

    --graph-bg: #FAF8F5;
    --node-stroke: #D97706;
}

/* ============================================================================
   GLOBAL STYLES & RESET
   ============================================================================ */

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

body {
    font-family: var(--font-body);
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    position: relative;
}

/* Technical Grid Background */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        linear-gradient(var(--grid-color) 1px, transparent 1px),
        linear-gradient(90deg, var(--grid-color) 1px, transparent 1px);
    background-size: 20px 20px;
    pointer-events: none;
    z-index: 0;
}

/* Subtle scanline effect */
body::after {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--scanline);
    pointer-events: none;
    opacity: 0.03;
    z-index: 1;
}

#app {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    position: relative;
    z-index: 2;
}

/* ============================================================================
   TYPOGRAPHY
   ============================================================================ */

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-display);
    font-weight: 700;
    line-height: 1.1;
    color: var(--text);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

h1 {
    font-size: 1.75rem;
    font-weight: 900;
}

h2 {
    font-size: 1.25rem;
    font-weight: 700;
}

h3 {
    font-size: 1rem;
    font-weight: 700;
}

code {
    font-family: var(--font-mono);
    font-size: 0.875em;
    padding: 0.125rem 0.5rem;
    background: var(--bg-secondary);
    color: var(--primary);
    border: 1px solid var(--border);
    font-weight: 500;
}

kbd {
    font-family: var(--font-mono);
    font-size: 0.875em;
    padding: 0.25rem 0.625rem;
    background: var(--bg-tertiary);
    border: 2px solid var(--border-strong);
    color: var(--text);
    font-weight: 600;
    text-transform: uppercase;
}

/* ============================================================================
   HEADER
   ============================================================================ */

header {
    background: var(--bg-secondary);
    border-bottom: 2px solid var(--border-strong);
    padding: 1.25rem 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    flex-wrap: wrap;
    gap: 0.5rem;
    overflow: hidden;
}

.header-content {
    flex: 1 1 0;
    text-align: center;
    min-width: 0;
    overflow: hidden;
}

.logo-mark {
    font-size: 1.25rem;
    color: var(--secondary);
    margin-bottom: 0.25rem;
    text-shadow: var(--glow-sm) var(--secondary-glow);
    animation: pulse-glow 3s ease-in-out infinite;
}

@keyframes pulse-glow {

    0%,
    100% {
        opacity: 1;
        text-shadow: var(--glow-sm) var(--secondary-glow);
    }

    50% {
        opacity: 0.8;
        text-shadow: var(--glow-md) var(--secondary-glow);
    }
}

header h1 {
    margin: 0;
    font-size: 1.5rem;
    font-weight: 900;
    letter-spacing: 0.1em;
    color: var(--text);
    text-shadow: var(--glow-sm) var(--primary-glow);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.subtitle {
    margin: 0.375rem 0 0;
    font-size: 0.75rem;
    color: var(--text-secondary);
    font-family: var(--font-mono);
    letter-spacing: 0.15em;
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.header-left,
.header-right {
    display: flex;
    gap: 0.625rem;
    min-width: 140px;
}

.header-right {
    justify-content: flex-end;
}

/* Theme Toggle */
.theme-toggle {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.625rem 1rem;
    background: var(--bg-tertiary);
    border: 2px solid var(--border-strong);
    color: var(--text);
    font-size: 0.75rem;
    font-weight: 700;
    font-family: var(--font-mono);
    letter-spacing: 0.05em;
    cursor: pointer;
    transition: all 0.2s;
    text-transform: uppercase;
}

.theme-toggle:hover {
    border-color: var(--secondary);
    box-shadow: var(--glow-sm) var(--secondary-glow);
    transform: translateY(-2px);
}

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

.sun-icon {
    display: none;
}

.moon-icon {
    display: block;
}

[data-theme="light"] .sun-icon {
    display: block;
}

[data-theme="light"] .moon-icon {
    display: none;
}

/* Icon Buttons */
.icon-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    background: var(--bg-tertiary);
    border: 2px solid var(--border);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s;
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 1.125rem;
}

.icon-btn:hover {
    background: var(--bg-secondary);
    color: var(--primary);
    border-color: var(--primary);
    box-shadow: var(--glow-sm) var(--primary-glow);
}

.icon-inner {
    line-height: 1;
}

/* ============================================================================
   MAIN CONTENT
   ============================================================================ */

main {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: 2rem;
    gap: 1.5rem;
}

/* Test Result Banner */
.test-result-banner {
    padding: 0.875rem 1.25rem;
    margin-top: 1rem;
    font-size: 0.8125rem;
    font-weight: 700;
    font-family: var(--font-mono);
    text-align: center;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    display: none;
    animation: banner-slide 0.3s ease-out;
    border: 2px solid;
}

@keyframes banner-slide {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }

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

.test-result-banner.accepted {
    display: block;
    background: rgba(0, 255, 136, 0.15);
    color: var(--success);
    border-color: var(--success);
    box-shadow: inset var(--glow-md) var(--success-glow);
}

.test-result-banner.rejected {
    display: block;
    background: rgba(255, 51, 102, 0.15);
    color: var(--error);
    border-color: var(--error);
    box-shadow: inset var(--glow-md) var(--error-glow);
}

.test-result-banner.error {
    display: block;
    background: rgba(255, 170, 0, 0.15);
    color: var(--warning);
    border-color: var(--warning);
    box-shadow: inset var(--glow-md) var(--warning-glow);
}

/* ============================================================================
   CONTENT GRID LAYOUT
   ============================================================================ */

.content-grid {
    display: grid;
    grid-template-columns: 340px 1fr;
    gap: 1.5rem;
    flex: 1;
}

/* ============================================================================
   INFO PANEL (LEFT SIDEBAR)
   ============================================================================ */

.info-panel {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.info-section {
    background: var(--bg-secondary);
    border: 2px solid var(--border);
    transition: all 0.2s;
}

.info-section:hover {
    border-color: var(--border-strong);
}

.section-title-bar {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    padding: 0.875rem 1.25rem;
    background: linear-gradient(135deg, var(--bg-tertiary) 0%, var(--bg-secondary) 100%);
    border-bottom: 1px solid var(--border);
    font-size: 0.75rem;
    font-weight: 700;
    font-family: var(--font-mono);
    color: var(--text-secondary);
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.section-marker {
    color: var(--primary);
    font-size: 0.875rem;
}

.left-controls {
    padding: 1.25rem;
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 0.625rem;
}

.control-group label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.help-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 18px;
    height: 18px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    color: var(--text-muted);
    font-size: 0.75rem;
    font-weight: 700;
    cursor: help;
    transition: all 0.2s;
}

.help-icon:hover {
    color: var(--secondary);
    border-color: var(--secondary);
    box-shadow: var(--glow-sm) var(--secondary-glow);
}

/* Tooltips */
[data-tooltip] {
    position: relative;
    cursor: help;
    display: inline-block;
}

[data-tooltip]:hover::before {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(-8px);
    padding: 0.6rem 1rem;
    background: #000;
    /* High contrast black background */
    border: 1px solid var(--primary);
    /* Colored border for visibility */
    color: #fff;
    font-size: 0.75rem;
    font-family: var(--font-mono);
    font-weight: 600;
    white-space: nowrap;
    z-index: 9999;
    pointer-events: none;
    opacity: 0;
    animation: tooltip-fade 0.2s forwards 0.1s;
    text-transform: none;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.6), var(--glow-sm) var(--primary-glow);
    border-radius: 4px;
}

[data-tooltip]:hover::after {
    content: '';
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    border-width: 5px;
    border-style: solid;
    border-color: var(--border-strong) transparent transparent transparent;
    z-index: 1001;
    pointer-events: none;
    opacity: 0;
    animation: tooltip-fade 0.2s forwards 0.1s;
}

@keyframes tooltip-fade {
    to {
        opacity: 1;
        transform: translateX(-50%) translateY(-4px);
        /* Moves up slightly for effect */
    }
}

/* Input Wrapper */
.input-wrapper {
    position: relative;
    width: 100%;
}

.input-wrapper input {
    width: 100%;
    padding: 0.75rem 1rem;
    padding-right: 2.5rem;
    background: var(--bg);
    border: 2px solid var(--border);
    font-size: 0.875rem;
    font-family: var(--font-mono);
    font-weight: 500;
    color: var(--text);
    transition: all 0.2s;
    letter-spacing: 0.025em;
}

.input-wrapper input:focus {
    outline: none;
    border-color: var(--secondary);
    box-shadow: inset var(--glow-sm) var(--secondary-glow),
        var(--glow-sm) var(--secondary-glow);
    background: var(--bg-secondary);
}

.input-wrapper input::placeholder {
    color: var(--text-muted);
}

.clear-btn {
    position: absolute;
    right: 0.5rem;
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    color: var(--text-muted);
    font-size: 1.25rem;
    line-height: 1;
    cursor: pointer;
    transition: all 0.2s;
}

.clear-btn:hover {
    background: var(--error);
    color: white;
    border-color: var(--error);
    box-shadow: var(--glow-sm) var(--error-glow);
}

.select-wrapper {
    position: relative;
    width: 100%;
    margin-bottom: 0.5rem;
}

.select-wrapper::after {
    content: '';
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    width: 1em;
    height: 1em;
    background-color: var(--text);
    mask: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e") no-repeat center;
    -webkit-mask: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e") no-repeat center;
    mask-size: contain;
    -webkit-mask-size: contain;
    pointer-events: none;
    transition: background-color 0.2s;
}

.export-selector {
    background: var(--bg-secondary);
    color: var(--text);
    border: 2px solid var(--border);
    padding: 0.75rem 1rem;
    font-family: var(--font-mono);
    font-size: 0.875rem;
    font-weight: 700;
    text-transform: uppercase;
    cursor: pointer;
    width: 100%;
    outline: none;
    transition: all 0.2s;
    appearance: none;
    -webkit-appearance: none;
}

.export-selector:hover,
.export-selector:focus {
    border-color: var(--secondary);
    box-shadow: var(--glow-sm) var(--secondary-glow);
}

.export-selector option {
    background: var(--bg-secondary);
    color: var(--text);
    font-weight: 700;
}

/* Buttons */
.btn-primary {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.625rem;
    padding: 0.875rem 1.5rem;
    background: var(--primary);
    border: none;
    color: var(--bg);
    font-size: 0.875rem;
    font-weight: 800;
    font-family: var(--font-display);
    letter-spacing: 0.075em;
    cursor: pointer;
    transition: all 0.2s;
    text-transform: uppercase;
    position: relative;
    overflow: hidden;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.5s;
}

.btn-primary:hover::before {
    left: 100%;
}

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

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

.btn-marker {
    font-size: 0.75rem;
}

.btn-secondary {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.375rem;
    padding: 0.75rem 1rem;
    background: var(--bg-tertiary);
    border: 2px solid var(--border);
    color: var(--text);
    font-size: 0.75rem;
    font-weight: 700;
    font-family: var(--font-mono);
    letter-spacing: 0.05em;
    cursor: pointer;
    transition: all 0.2s;
    text-transform: uppercase;
}

.btn-secondary:hover {
    background: var(--bg-secondary);
    border-color: var(--secondary);
    color: var(--secondary);
    box-shadow: var(--glow-sm) var(--secondary-glow);
}

.btn-test {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.625rem;
    padding: 0.875rem 1.5rem;
    background: var(--secondary);
    border: none;
    color: var(--bg);
    font-size: 0.875rem;
    font-weight: 800;
    font-family: var(--font-display);
    letter-spacing: 0.075em;
    cursor: pointer;
    transition: all 0.2s;
    text-transform: uppercase;
}

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

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

.button-group {
    display: flex;
    gap: 0.5rem;
}

.button-group .btn-secondary {
    flex: 1;
}

/* Info Popup Buttons */
.info-buttons {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.info-popup-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.875rem 1.25rem;
    background: var(--bg-secondary);
    border: 2px solid var(--border);
    color: var(--text);
    font-size: 0.8125rem;
    font-weight: 700;
    font-family: var(--font-mono);
    letter-spacing: 0.05em;
    cursor: pointer;
    transition: all 0.2s;
    text-transform: uppercase;
}

.info-popup-btn:hover {
    background: var(--bg-tertiary);
    border-color: var(--primary);
    color: var(--primary);
    transform: translateX(4px);
    box-shadow: var(--glow-sm) var(--primary-glow);
}

.btn-bracket {
    color: var(--text-muted);
    font-size: 1rem;
}

.info-popup-btn:hover .btn-bracket {
    color: var(--primary);
}

/* Statistics Section */
.stats-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.875rem;
    padding: 1.25rem;
}

.stat-item {
    display: flex;
    flex-direction: column;
    gap: 0.375rem;
    padding: 0.875rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    transition: all 0.2s;
}

.stat-item:hover {
    border-color: var(--primary);
    box-shadow: inset var(--glow-sm) var(--primary-glow);
}

.stat-label {
    font-size: 0.6875rem;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.075em;
}

.stat-value {
    font-size: 1.75rem;
    font-weight: 900;
    color: var(--primary);
    font-family: var(--font-display);
    line-height: 1;
    text-shadow: var(--glow-sm) var(--primary-glow);
}

/* ============================================================================
   VISUALIZATION PANEL (RIGHT SIDE)
   ============================================================================ */

.visualization-panel {
    display: flex;
    flex-direction: column;
    background: var(--bg-secondary);
    border: 2px solid var(--border);
    overflow: hidden;
}

.panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 1.5rem;
    background: linear-gradient(135deg, var(--bg-tertiary) 0%, var(--bg-secondary) 100%);
    border-bottom: 2px solid var(--border-strong);
}

.panel-header h2 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin: 0;
    font-size: 1rem;
    font-weight: 700;
    color: var(--text);
    letter-spacing: 0.075em;
}

.title-bracket {
    color: var(--text-muted);
    font-size: 0.875rem;
    font-family: var(--font-mono);
}

.view-controls {
    display: flex;
    gap: 0.5rem;
}

#graph-container {
    flex: 1;
    padding: 2rem;
    background: var(--graph-bg);
    overflow: auto;
    min-height: 500px;
    position: relative;
}

/* Technical grid overlay for graph */
#graph-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        linear-gradient(var(--grid-line) 2px, transparent 2px),
        linear-gradient(90deg, var(--grid-line) 2px, transparent 2px);
    background-size: 50px 50px;
    pointer-events: none;
    opacity: 0.3;
}

.graph-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.875rem 1.5rem;
    background: var(--bg-tertiary);
    border-top: 1px solid var(--border);
}

.graph-stats {
    font-size: 0.75rem;
    font-family: var(--font-mono);
    color: var(--text-secondary);
    letter-spacing: 0.05em;
}

/* Placeholder */
.placeholder-message {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 400px;
    text-align: center;
    color: var(--text-muted);
    position: relative;
    z-index: 1;
}

.placeholder-icon {
    position: relative;
    width: 120px;
    height: 120px;
    margin-bottom: 2rem;
}

.scope-circle {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100px;
    height: 100px;
    border: 3px solid var(--secondary);
    border-radius: 50%;
    box-shadow: inset var(--glow-md) var(--secondary-glow),
        var(--glow-md) var(--secondary-glow);
    animation: scope-pulse 2s ease-in-out infinite;
}

@keyframes scope-pulse {

    0%,
    100% {
        transform: translate(-50%, -50%) scale(1);
        opacity: 1;
    }

    50% {
        transform: translate(-50%, -50%) scale(1.05);
        opacity: 0.8;
    }
}

.scope-line {
    position: absolute;
    background: var(--secondary);
    box-shadow: var(--glow-sm) var(--secondary-glow);
}

.scope-line-h {
    top: 50%;
    left: 0;
    width: 100%;
    height: 2px;
    transform: translateY(-50%);
}

.scope-line-v {
    left: 50%;
    top: 0;
    width: 2px;
    height: 100%;
    transform: translateX(-50%);
}

.placeholder-text {
    margin: 0;
    font-size: 1.125rem;
    font-weight: 700;
    font-family: var(--font-display);
    letter-spacing: 0.1em;
    color: var(--text-secondary);
}

.placeholder-hint {
    margin: 0.75rem 0 0;
    font-size: 0.8125rem;
    font-family: var(--font-mono);
    color: var(--text-muted);
    letter-spacing: 0.05em;
}

.link-btn {
    background: transparent;
    border: none;
    color: var(--primary);
    font-weight: 700;
    font-family: inherit;
    cursor: pointer;
    text-decoration: underline;
    text-underline-offset: 2px;
    padding: 0;
    transition: all 0.2s;
}

.link-btn:hover {
    color: var(--secondary);
    text-shadow: var(--glow-sm) var(--secondary-glow);
}

/* Graph Wrapper */
.graph-wrapper {
    margin-bottom: 2rem;
    border: 2px solid var(--border);
    overflow: hidden;
    background: var(--bg-secondary);
}

.graph-wrapper h3 {
    margin: 0;
    padding: 0.875rem 1.25rem;
    background: var(--bg-tertiary);
    border-bottom: 2px solid var(--border-strong);
    font-size: 0.875rem;
    font-weight: 700;
    letter-spacing: 0.075em;
}

.graph-canvas {
    min-height: 400px;
    background: var(--graph-bg);
    padding: 1.5rem;
}

/* SVG Styles */
.node circle {
    fill: var(--node-fill);
    stroke: var(--node-stroke);
    stroke-width: 3px;
    filter: drop-shadow(0 0 8px var(--secondary-glow));
    transition: all 0.3s;
}

.node text {
    font-family: var(--font-display);
    font-size: 16px;
    font-weight: 700;
    fill: var(--text);
    text-anchor: middle;
    dominant-baseline: middle;
    text-transform: uppercase;
}

.node.start circle {
    fill: var(--primary);
    stroke: var(--primary);
    filter: drop-shadow(0 0 12px var(--primary-glow));
}

.node.accept circle {
    fill: var(--success);
    stroke: var(--success);
    stroke-width: 4px;
    filter: drop-shadow(0 0 12px var(--success-glow));
}

.node.active circle {
    fill: var(--warning);
    stroke: var(--warning);
    filter: drop-shadow(0 0 15px var(--warning-glow));
    animation: node-pulse 1s ease-in-out infinite;
}

@keyframes node-pulse {

    0%,
    100% {
        stroke-width: 3px;
    }

    50% {
        stroke-width: 5px;
    }
}

.node.dead circle {
    fill: var(--bg-tertiary);
    stroke: var(--error);
    stroke-dasharray: 5, 3;
    opacity: 0.5;
}

.edge path {
    stroke: var(--edge-color);
    stroke-width: 2.5px;
    fill: none;
    transition: stroke 0.3s;
}

.edge:hover path {
    stroke: var(--secondary);
    filter: drop-shadow(0 0 6px var(--secondary-glow));
}

.edge text {
    font-family: var(--font-mono);
    font-size: 14px;
    font-weight: 600;
    fill: var(--text-secondary);
    text-transform: uppercase;
}

/* ============================================================================
   POPUPS & MODALS
   ============================================================================ */

.info-popup-overlay {
    position: fixed;
    inset: 0;
    background: rgba(10, 14, 39, 0.85);
    backdrop-filter: blur(8px);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: overlay-fade 0.2s ease-out;
}

@keyframes overlay-fade {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

.info-popup {
    background: var(--bg-secondary);
    border: 3px solid var(--border-strong);
    width: 90%;
    max-width: 700px;
    max-height: 80vh;
    display: flex;
    flex-direction: column;
    box-shadow: var(--glow-lg) var(--primary-glow);
    animation: popup-slide 0.3s ease-out;
}

@keyframes popup-slide {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }

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

.info-popup-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.25rem 1.5rem;
    background: linear-gradient(135deg, var(--bg-tertiary) 0%, var(--bg-secondary) 100%);
    border-bottom: 2px solid var(--border-strong);
}

.info-popup-header h2 {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin: 0;
    font-size: 1.125rem;
    font-weight: 700;
    letter-spacing: 0.075em;
}

.popup-marker {
    color: var(--primary);
    font-size: 1.25rem;
}

.info-popup-close {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--bg-tertiary);
    border: 2px solid var(--border);
    color: var(--text-muted);
    font-size: 1.5rem;
    font-weight: 700;
    line-height: 1;
    cursor: pointer;
    transition: all 0.2s;
}

.info-popup-close:hover {
    background: var(--error);
    color: white;
    border-color: var(--error);
    box-shadow: var(--glow-md) var(--error-glow);
    transform: rotate(90deg);
}

.info-popup-body {
    flex: 1;
    padding: 1.5rem;
    overflow-y: auto;
}

/* Empty State */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 3rem 1.5rem;
    text-align: center;
    color: var(--text-muted);
}

.empty-icon {
    font-size: 4rem;
    color: var(--text-muted);
    margin-bottom: 1rem;
    opacity: 0.3;
    font-family: var(--font-display);
}

.empty-state p {
    margin: 0;
    font-size: 0.875rem;
    font-family: var(--font-mono);
    letter-spacing: 0.05em;
}

/* Transition Cards */
.transition-cards {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.transition-card {
    background: var(--bg-tertiary);
    border: 2px solid var(--border);
    overflow: hidden;
}

.transition-card-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
}

.state-name {
    font-size: 0.9375rem;
    font-weight: 700;
    color: var(--primary);
    font-family: var(--font-mono);
    text-transform: uppercase;
}

.transition-card-body {
    padding: 1rem;
}

.transition-row {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem 0;
    font-size: 0.875rem;
    font-family: var(--font-mono);
}

.transition-symbol {
    font-weight: 700;
    color: var(--secondary);
    min-width: 50px;
    text-transform: uppercase;
}

.transition-arrow {
    color: var(--text-muted);
}

.transition-targets {
    color: var(--text);
    font-weight: 600;
}

.text-muted {
    color: var(--text-muted);
    font-style: italic;
}

/* State List */
.state-list {
    display: flex;
    flex-direction: column;
    gap: 0.875rem;
}

.state-item {
    padding: 1rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-left: 3px solid var(--primary);
}

.state-header {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    margin-bottom: 0.5rem;
}

.state-badge {
    font-size: 0.6875rem;
    padding: 0.25rem 0.625rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border: 1px solid;
}

.start-badge {
    background: rgba(255, 149, 0, 0.15);
    color: var(--primary);
    border-color: var(--primary);
}

.final-badge {
    background: rgba(0, 255, 136, 0.15);
    color: var(--success);
    border-color: var(--success);
}

.state-transitions {
    font-size: 0.875rem;
    font-family: var(--font-mono);
    color: var(--text-secondary);
}

/* Log Entries */
.log-entries {
    display: flex;
    flex-direction: column;
    gap: 0.875rem;
}

.log-entry {
    display: flex;
    gap: 1rem;
    padding: 1rem;
    background: var(--bg-tertiary);
    border: 2px solid;
    border-left-width: 4px;
}

.log-entry.log-success {
    border-color: var(--success);
    background: rgba(0, 255, 136, 0.05);
}

.log-entry.log-info {
    border-color: var(--secondary);
    background: rgba(0, 229, 204, 0.05);
}

.log-entry.log-warning {
    border-color: var(--warning);
    background: rgba(255, 170, 0, 0.05);
}

.log-icon {
    font-size: 1.25rem;
    flex-shrink: 0;
    line-height: 1;
}

.log-entry.log-success .log-icon {
    color: var(--success);
}

.log-entry.log-info .log-icon {
    color: var(--secondary);
}

.log-entry.log-warning .log-icon {
    color: var(--warning);
}

.log-content {
    flex: 1;
}

.log-title {
    font-weight: 700;
    font-size: 0.9375rem;
    color: var(--text);
    margin-bottom: 0.25rem;
    font-family: var(--font-mono);
    text-transform: uppercase;
}

.log-description {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-family: var(--font-body);
}

/* ============================================================================
   MODALS
   ============================================================================ */

.modal {
    position: fixed;
    inset: 0;
    background: rgba(10, 14, 39, 0.9);
    backdrop-filter: blur(8px);
    z-index: 1000;
    display: none;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex !important;
    animation: overlay-fade 0.2s ease-out;
}

.modal-content {
    background: var(--bg-secondary);
    border: 3px solid var(--border-strong);
    width: 90%;
    max-width: 900px;
    max-height: 85vh;
    display: flex;
    flex-direction: column;
    box-shadow: var(--glow-lg) rgba(0, 229, 204, 0.2);
    animation: popup-slide 0.3s ease-out;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.5rem 2rem;
    background: linear-gradient(135deg, var(--bg-tertiary) 0%, var(--bg-secondary) 100%);
    border-bottom: 2px solid var(--border-strong);
}

.modal-header h2 {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin: 0;
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: 0.075em;
}

.modal-close {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: var(--bg-tertiary);
    border: 2px solid var(--border);
    color: var(--text-muted);
    font-size: 1.75rem;
    font-weight: 700;
    line-height: 1;
    cursor: pointer;
    transition: all 0.2s;
}

.modal-close:hover {
    background: var(--error);
    color: white;
    border-color: var(--error);
    box-shadow: var(--glow-md) var(--error-glow);
    transform: rotate(90deg);
}

.modal-body {
    flex: 1;
    padding: 2rem;
    overflow-y: auto;
}

/* Help Section */
.help-section {
    margin-bottom: 2.5rem;
}

.help-section:last-child {
    margin-bottom: 0;
}

.help-section h3 {
    font-size: 1.125rem;
    margin-bottom: 1rem;
    color: var(--text);
    letter-spacing: 0.075em;
}

/* Syntax Table */
.syntax-table {
    width: 100%;
    border-collapse: collapse;
    border: 2px solid var(--border);
    font-family: var(--font-mono);
}

.syntax-table th {
    padding: 0.875rem 1rem;
    background: var(--bg-tertiary);
    border-bottom: 2px solid var(--border-strong);
    font-size: 0.75rem;
    font-weight: 700;
    text-align: left;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.075em;
}

.syntax-table td {
    padding: 0.875rem 1rem;
    border-bottom: 1px solid var(--border);
    font-size: 0.875rem;
    color: var(--text);
}

.syntax-table tbody tr:last-child td {
    border-bottom: none;
}

.syntax-table tbody tr:hover {
    background: var(--bg-tertiary);
}

/* Shortcuts List */
.shortcuts-list {
    list-style: none;
    padding: 0;
}

.shortcuts-list li {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.875rem 0;
    border-bottom: 1px solid var(--border);
    font-family: var(--font-mono);
}

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

.shortcuts-list span {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* Process Steps */
.process-steps {
    padding-left: 2rem;
    counter-reset: step-counter;
}

.process-steps li {
    padding: 0.875rem 0;
    position: relative;
    counter-increment: step-counter;
    font-family: var(--font-body);
    color: var(--text-secondary);
}

.process-steps li::before {
    content: counter(step-counter);
    position: absolute;
    left: -2rem;
    width: 1.75rem;
    height: 1.75rem;
    background: var(--primary);
    color: var(--bg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.875rem;
    font-weight: 900;
    font-family: var(--font-display);
    box-shadow: var(--glow-sm) var(--primary-glow);
}

.process-steps strong {
    color: var(--text);
    font-weight: 700;
}

/* Examples Grid */
.examples-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.25rem;
}

.example-card {
    background: var(--bg-tertiary);
    border: 2px solid var(--border);
    padding: 1.5rem;
    cursor: pointer;
    transition: all 0.2s;
}

.example-card:hover {
    background: var(--bg-secondary);
    border-color: var(--primary);
    box-shadow: var(--glow-sm) var(--primary-glow);
    transform: translateY(-4px);
}

.example-card h4 {
    margin: 0 0 0.875rem 0;
    font-size: 0.9375rem;
    font-weight: 700;
    color: var(--text);
    letter-spacing: 0.05em;
}

.example-card code {
    display: block;
    padding: 0.875rem;
    background: var(--bg);
    border: 1px solid var(--border);
    font-size: 0.9375rem;
    margin: 0.875rem 0;
    color: var(--secondary);
    font-weight: 600;
}

.example-card p {
    margin: 0.875rem 0 1.25rem 0;
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-family: var(--font-body);
}

.try-example-btn {
    width: 100%;
}

/* ============================================================================
   BATCH TESTING
   ============================================================================ */

.batch-test-section {
    background: var(--bg-secondary);
    border: 2px solid var(--border);
    overflow: hidden;
}

.section-header {
    padding: 1rem 1.5rem;
    background: linear-gradient(135deg, var(--bg-tertiary) 0%, var(--bg-secondary) 100%);
    border-bottom: 2px solid var(--border-strong);
}

.section-header h3 {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin: 0;
    font-size: 0.9375rem;
    font-weight: 700;
    letter-spacing: 0.075em;
}

.batch-test-content {
    padding: 1.5rem;
}

.batch-input-area {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.batch-input-area label {
    font-size: 0.75rem;
    font-weight: 700;
    font-family: var(--font-mono);
    color: var(--text-secondary);
    letter-spacing: 0.05em;
}

.batch-input-area textarea {
    width: 100%;
    padding: 1rem;
    background: var(--bg);
    border: 2px solid var(--border);
    font-family: var(--font-mono);
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--text);
    resize: vertical;
    min-height: 140px;
    transition: all 0.2s;
}

.batch-input-area textarea:focus {
    outline: none;
    border-color: var(--secondary);
    box-shadow: inset var(--glow-sm) var(--secondary-glow),
        var(--glow-sm) var(--secondary-glow);
    background: var(--bg-secondary);
}

.batch-results {
    margin-top: 1.5rem;
}

/* ============================================================================
   FOOTER
   ============================================================================ */

footer {
    background: var(--bg-secondary);
    border-top: 2px solid var(--border-strong);
    padding: 1.5rem 2rem;
    margin-top: auto;
}

.footer-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-section {
    display: flex;
    align-items: center;
    gap: 0.875rem;
}

.footer-section p {
    margin: 0;
    font-size: 0.75rem;
    font-family: var(--font-mono);
    color: var(--text-muted);
    letter-spacing: 0.05em;
}

.footer-section a {
    font-size: 0.75rem;
    font-family: var(--font-mono);
    color: var(--secondary);
    text-decoration: none;
    font-weight: 600;
    letter-spacing: 0.05em;
    transition: all 0.2s;
}

.footer-section a:hover {
    color: var(--primary);
    text-shadow: var(--glow-sm) var(--primary-glow);
}

.separator {
    color: var(--text-muted);
}

.version {
    padding: 0.25rem 0.75rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    font-size: 0.6875rem;
    font-family: var(--font-mono);
    color: var(--text-muted);
    letter-spacing: 0.05em;
}

/* ============================================================================
   TOAST NOTIFICATIONS
   ============================================================================ */

.toast-container {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    z-index: 10000;
    display: flex;
    flex-direction: column;
    gap: 0.875rem;
    max-width: 400px;
}

.toast {
    padding: 1rem 1.25rem;
    font-size: 0.875rem;
    font-weight: 700;
    font-family: var(--font-mono);
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--text);
    background: var(--bg-secondary);
    border: 2px solid;
    border-left-width: 5px;
    animation: toast-slide 0.3s ease-out;
    box-shadow: var(--glow-md) rgba(0, 0, 0, 0.5);
}

@keyframes toast-slide {
    from {
        opacity: 0;
        transform: translateX(100%);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.toast-error {
    border-color: var(--error);
    color: var(--error);
    box-shadow: var(--glow-md) var(--error-glow);
}

.toast-warning {
    border-color: var(--warning);
    color: var(--warning);
    box-shadow: var(--glow-md) var(--warning-glow);
}

.toast-success {
    border-color: var(--success);
    color: var(--success);
    box-shadow: var(--glow-md) var(--success-glow);
}

.toast-info {
    border-color: var(--secondary);
    color: var(--secondary);
    box-shadow: var(--glow-md) var(--secondary-glow);
}

/* ============================================================================
   LOADING OVERLAY
   ============================================================================ */

.loading-overlay {
    position: fixed;
    inset: 0;
    background: rgba(10, 14, 39, 0.95);
    backdrop-filter: blur(10px);
    z-index: 2000;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.spinner {
    width: 80px;
    height: 80px;
    position: relative;
}

.spinner-inner {
    width: 100%;
    height: 100%;
    border: 4px solid transparent;
    border-top-color: var(--primary);
    border-right-color: var(--secondary);
    border-radius: 50%;
    animation: spinner-rotate 1s linear infinite;
    box-shadow: var(--glow-md) var(--primary-glow);
}

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

.loading-text {
    margin-top: 2rem;
    color: var(--text);
    font-size: 1rem;
    font-weight: 700;
    font-family: var(--font-mono);
    letter-spacing: 0.2em;
    text-transform: uppercase;
    animation: loading-pulse 1.5s ease-in-out infinite;
}

@keyframes loading-pulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.5;
    }
}

/* ============================================================================
   UTILITIES
   ============================================================================ */

.hidden {
    display: none !important;
}

/* ============================================================================
   SCROLLBAR
   ============================================================================ */

::-webkit-scrollbar {
    width: 14px;
    height: 14px;
}

::-webkit-scrollbar-track {
    background: var(--bg);
    border: 1px solid var(--border);
}

::-webkit-scrollbar-thumb {
    background: var(--border-strong);
    border: 2px solid var(--bg);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--secondary);
    box-shadow: inset var(--glow-sm) var(--secondary-glow);
}

/* ============================================================================
   RESPONSIVE DESIGN
   ============================================================================ */

@media (max-width: 1200px) {
    .content-grid {
        grid-template-columns: 300px 1fr;
    }
}

/* ── Tablet / small desktop: stack panels vertically ── */
@media (max-width: 992px) {
    .content-grid {
        grid-template-columns: 1fr;
    }

    /* Put controls ABOVE the visualization canvas when stacked */
    .info-panel {
        order: -1;
    }

    /* Limit canvas height so content below is still reachable without endless scroll */
    #graph-container {
        min-height: 320px;
        max-height: 50vh;
    }

    /* Shrink placeholder so it doesn't dominate the collapsed canvas */
    .placeholder-message {
        min-height: 260px;
    }

    /* Panel header: let the title wrap instead of overflow */
    .panel-header {
        flex-wrap: wrap;
        gap: 0.5rem;
    }

    .panel-header h2 {
        font-size: 0.875rem;
        white-space: normal;
        word-break: break-word;
        flex: 1;
        min-width: 0;
    }

    /* Hide decorative bracket glyphs on small panels to save space */
    .title-bracket {
        display: none;
    }

    /* Batch test section – reduce top padding */
    .batch-test-section {
        margin-top: 0;
    }

    main {
        padding: 1.5rem;
        gap: 1rem;
    }

    /* Two-column stats stay readable at this width */
    .stats-grid {
        grid-template-columns: 1fr 1fr;
    }
}

/* ── Compact tablet / large phone ── */
@media (max-width: 768px) {
    header {
        padding: 1rem 1.5rem;
    }

    header h1 {
        font-size: 1.25rem;
    }

    .subtitle {
        font-size: 0.6875rem;
    }

    main {
        padding: 1rem;
        gap: 0.875rem;
    }

    /* Further reduce canvas to keep UI usable */
    #graph-container {
        min-height: 260px;
        max-height: 40vh;
    }

    .placeholder-message {
        min-height: 200px;
    }

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

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

    /* Batch testing – tighter padding */
    .batch-test-section {
        padding: 0;
    }

    .batch-input-area {
        padding: 1rem;
    }

    /* Footer – wrap links */
    .footer-content {
        flex-direction: column;
        gap: 0.5rem;
        text-align: center;
    }

    .footer-section {
        justify-content: center;
        flex-wrap: wrap;
    }

    /* View controls (zoom buttons) – smaller on mobile */
    .view-controls .icon-btn {
        width: 34px;
        height: 34px;
        font-size: 1rem;
    }
}

/* ── Mobile phones ── */
@media (max-width: 640px) {
    header {
        flex-wrap: wrap;
        justify-content: center;
        padding: 0.75rem 1rem;
    }

    .header-left,
    .header-right {
        min-width: auto;
    }

    .header-content {
        order: -1;
        flex: 1 1 100%;
        text-align: center;
    }

    header h1 {
        font-size: 1rem;
    }

    .subtitle {
        font-size: 0.5625rem;
        letter-spacing: 0.05em;
    }

    .theme-text {
        display: none;
    }

    .modal-content {
        width: 95%;
        max-height: 90vh;
    }

    .modal-header,
    .modal-body {
        padding: 1.25rem;
    }

    /* Stats in a single column on phones */
    .stats-grid {
        grid-template-columns: 1fr 1fr;
    }

    /* Stat values smaller on phones */
    .stat-value {
        font-size: 1.25rem;
    }

    /* Graph canvas minimal height */
    #graph-container {
        min-height: 220px;
        max-height: 35vh;
    }

    .placeholder-message {
        min-height: 180px;
    }

    .placeholder-icon {
        width: 80px;
        height: 80px;
        margin-bottom: 1rem;
    }

    .scope-circle {
        width: 64px;
        height: 64px;
    }

    .placeholder-text {
        font-size: 0.875rem;
    }

    /* Batch test textarea */
    #batch-test-input {
        min-height: 80px;
    }

    /* Button groups wrap */
    .button-group {
        flex-wrap: wrap;
    }

    /* Info popup buttons slightly smaller */
    .info-popup-btn {
        padding: 0.75rem 1rem;
        font-size: 0.75rem;
    }
}

/* ============================================================================
   FEEDBACK FORM STYLES
   ============================================================================ */

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-family: var(--font-mono);
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--text);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    background: var(--bg-secondary);
    border: 2px solid var(--border);
    color: var(--text);
    font-family: var(--font-body);
    font-size: 0.9375rem;
    transition: all 0.2s;
    outline: none;
}

.form-group input[type="text"]:focus,
.form-group input[type="email"]:focus,
.form-group textarea:focus {
    border-color: var(--primary);
    box-shadow: var(--glow-sm) var(--primary-glow);
    background: var(--bg-tertiary);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
    font-family: var(--font-body);
    line-height: 1.6;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-muted);
    opacity: 0.6;
}

.form-actions {
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
    margin-top: 1.5rem;
}

.form-actions button {
    min-width: 180px;
}

/* ============================================================================
   GRAPH WRAPPER STYLES
   ============================================================================ */

.graph-wrapper {
    margin-bottom: 3rem;
    padding-top: 1rem;
}

.graph-wrapper h3 {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin: 0 0 1.5rem 0;
    padding: 1rem 1.5rem;
    background: var(--bg-secondary);
    border-left: 4px solid var(--primary);
    box-shadow: var(--glow-sm) var(--primary-glow);
}

.graph-canvas {
    min-height: 400px;
    background: var(--bg-tertiary);
    border: 2px solid var(--border);
    position: relative;
}