:root {
    --bg-dark: #020617;
    --bg-card: rgba(15, 23, 42, 0.7);
    --bg-accent: #0f172a;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --accent-color: #38bdf8;
    --accent-glow: rgba(56, 189, 248, 0.4);
    --secondary-color: #a78bfa;
    --secondary-glow: rgba(167, 139, 250, 0.4);
    --error-color: #ef4444;
    --warning-color: #f59e0b;
    --success-color: #10b981;
    --border-color: rgba(51, 65, 85, 0.5);
    --card-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.8);
    --font-main: 'Inter', system-ui, -apple-system, sans-serif;
    --font-heading: 'Outfit', sans-serif;
    --transition-speed: 0.3s;
}

/* Light Mode Variables */
body.light-mode {
    --bg-dark: #f8fafc;
    --bg-card: rgba(255, 255, 255, 0.8);
    --bg-accent: #f1f5f9;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --accent-color: #0284c7;
    --accent-glow: rgba(2, 132, 199, 0.2);
    --secondary-color: #7c3aed;
    --secondary-glow: rgba(124, 58, 237, 0.2);
    --border-color: rgba(148, 163, 184, 0.3);
    --card-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
}

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

body {
    background: var(--bg-dark);
    background-image:
        radial-gradient(at 0% 0%, rgba(56, 189, 248, 0.1) 0, transparent 50%),
        radial-gradient(at 100% 100%, rgba(167, 139, 250, 0.1) 0, transparent 50%);
    color: var(--text-primary);
    font-family: var(--font-main);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 2rem 1rem;
    overflow-x: hidden;
    transition: background var(--transition-speed), color var(--transition-speed);
}

.app-container {
    width: 100%;
    max-width: 850px;
    background: var(--bg-card);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    padding: 2.5rem;
    box-shadow: var(--card-shadow);
    position: relative;
    overflow: hidden;
    transition: background var(--transition-speed), border var(--transition-speed), box-shadow var(--transition-speed);
}

/* Top Controls */
.top-controls {
    position: absolute;
    top: 1rem;
    right: 1rem;
    display: flex;
    gap: 0.5rem;
    z-index: 100;
}

.control-btn {
    background: var(--bg-accent);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    width: 34px;
    height: 34px;
    border-radius: 8px;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    transition: all 0.2s ease;
    padding: 0;
    /* Ensure no padding interferes with icon centering */
}

.control-btn:hover {
    border-color: var(--accent-color);
    background: rgba(56, 189, 248, 0.1);
}

/* Ensure Icons are visible */
.lucide {
    width: 18px;
    height: 18px;
    stroke-width: 2px;
}

/* Glassmorphism accent lines */
.app-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent-color), transparent);
}

header {
    margin-bottom: 2.5rem;
    text-align: center;
    padding-top: 1.5rem;
    /* Add space for top-controls on small screens */
}

h1 {
    font-family: var(--font-heading);
    font-size: 2.25rem;
    font-weight: 700;
    background: linear-gradient(to right, #38bdf8, #a78bfa);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 0.5rem;
    letter-spacing: -0.025em;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* Wizard Progress */
.progress-bar {
    display: flex;
    justify-content: space-between;
    margin-bottom: 3rem;
    position: relative;
}

.progress-bar::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--border-color);
    z-index: 1;
    transform: translateY(-50%);
}

.progress-step {
    width: 36px;
    height: 36px;
    background: var(--bg-accent);
    border: 2px solid var(--border-color);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 2;
    font-weight: 600;
    color: var(--text-secondary);
    transition: all 0.4s ease;
    font-size: 0.85rem;
}

.progress-step.active {
    background: var(--accent-color);
    border-color: var(--accent-color);
    color: var(--bg-dark);
    box-shadow: 0 0 15px var(--accent-glow);
}

.progress-step.completed {
    background: var(--secondary-color);
    border-color: var(--secondary-color);
    color: var(--bg-dark);
}

/* Steps Transition */
.step-container {
    display: none;
    animation: fadeIn 0.5s ease forwards;
}

.step-container.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

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

/* Inputs & Form Elements */
label {
    display: block;
    margin-bottom: 0.75rem;
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text-primary);
}

textarea,
input[type="text"],
select {
    width: 100%;
    background: var(--bg-accent);
    border: 1px solid var(--border-color);
    padding: 1rem;
    border-radius: 12px;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 1rem;
    transition: all 0.3s ease;
    outline: none;
}

textarea:focus,
input[type="text"]:focus,
select:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

textarea {
    height: 151px;
    resize: none;
}

/* Score Indicator */
.score-wrapper {
    margin-top: 1rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    background: rgba(255, 255, 255, 0.03);
    padding: 0.75rem 1rem;
    border-radius: 12px;
}

.score-text {
    font-size: 0.85rem;
    color: var(--text-secondary);
    flex-grow: 1;
}

.score-gauge {
    width: 120px;
    height: 8px;
    background: var(--border-color);
    border-radius: 4px;
    overflow: hidden;
    position: relative;
}

.score-fill {
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    width: 0%;
    transition: all 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.score-numeric {
    font-weight: 700;
    font-size: 1rem;
    min-width: 40px;
    text-align: right;
}

/* Buttons */
.button-group {
    display: flex;
    justify-content: space-between;
    margin-top: 2.5rem;
    gap: 1rem;
}

button {
    padding: 0.75rem 1.75rem;
    border-radius: 12px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: none;
    font-family: var(--font-heading);
}

.btn-primary {
    background: var(--accent-color);
    color: var(--bg-dark);
    box-shadow: 0 4px 12px var(--accent-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px var(--accent-glow);
}

.btn-secondary {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--text-secondary);
}

button:disabled {
    opacity: 0.4;
    cursor: not-allowed;
    transform: none !important;
}

/* Dynamic Questions */
.dynamic-questions {
    display: grid;
    gap: 1.5rem;
    margin-top: 1rem;
}

.question-card {
    background: rgba(255, 255, 255, 0.03);
    padding: 1.25rem;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    transition: transform 0.3s ease;
}

.question-card:hover {
    border-color: rgba(167, 139, 250, 0.3);
}

/* Model Selector Cards */
.model-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    margin-bottom: 2rem;
}

.model-card {
    background: var(--bg-accent);
    border: 2px solid var(--border-color);
    padding: 1.25rem;
    border-radius: 16px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
}

.model-card:hover {
    border-color: var(--accent-color);
    background: rgba(56, 189, 248, 0.05);
}

.model-card.selected {
    border-color: var(--secondary-color);
    background: rgba(167, 139, 250, 0.08);
    box-shadow: 0 0 20px var(--secondary-glow);
}

.model-card i {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    display: block;
}

.model-name {
    font-weight: 700;
    font-size: 0.9rem;
    display: block;
}

.model-version {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* Preview Area */
.preview-container {
    background: #000;
    border-radius: 16px;
    padding: 1.5rem;
    border: 1px solid var(--border-color);
    position: relative;
    margin-top: 1rem;
}

pre {
    color: #38bdf8;
    white-space: pre-wrap;
    word-break: break-all;
    font-family: 'Fira Code', 'Monaco', monospace;
    font-size: 0.9rem;
    line-height: 1.6;
}

.copy-badge {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: var(--accent-color);
    color: var(--bg-dark);
    padding: 0.25rem 0.75rem;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 700;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.copy-badge.visible {
    opacity: 1;
}

/* Checkbox Toggles for Beginner Mode */
.toggle-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-top: 1rem;
}

.toggle-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    background: rgba(255, 255, 255, 0.03);
    padding: 1rem;
    border-radius: 12px;
    cursor: pointer;
    user-select: none;
    transition: all 0.2s ease;
}

.toggle-item:hover {
    background: rgba(255, 255, 255, 0.06);
}

.toggle-item input {
    width: 20px;
    height: 20px;
    accent-color: var(--accent-color);
}

.toggle-label {
    font-size: 0.9rem;
    color: var(--text-primary);
}

/* Responsive Fixes */
@media (max-width: 640px) {
    .model-grid {
        grid-template-columns: 1fr;
    }

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

    .app-container {
        padding: 1.5rem;
        border-radius: 16px;
    }

    h1 {
        font-size: 1.75rem;
    }

    .top-controls {
        top: 0.75rem;
        right: 0.75rem;
    }

    header {
        padding-top: 2.5rem;
        /* More space for buttons on mobile */
    }
}

/* Modal Styling */
.modal {
    display: none;
    position: fixed;
    z-index: 100;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    animation: fadeIn 0.3s ease;
}

.modal-content {
    background-color: var(--bg-card);
    margin: 10% auto;
    padding: 2.5rem;
    border: 1px solid var(--border-color);
    width: 90%;
    max-width: 500px;
    border-radius: 24px;
    position: relative;
    box-shadow: var(--card-shadow);
    transition: background var(--transition-speed);
}

.close-modal {
    position: absolute;
    top: 1.25rem;
    right: 1.5rem;
    color: var(--text-secondary);
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    line-height: 1;
}

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

.github-link {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    background: var(--accent-color);
    color: var(--bg-dark);
    padding: 0.85rem 1.5rem;
    border-radius: 12px;
    text-decoration: none;
    font-weight: 700;
    font-size: 0.95rem;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    margin-top: 1rem;
}

.github-link:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--accent-glow);
}

.github-link svg {
    width: 20px;
    height: 20px;
}

/* V2 Specific Styles */
.view-container {
    display: none;
    animation: slideUp 0.4s ease-out;
}

.view-container.active {
    display: block;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

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

.metric-card {
    background: rgba(255, 255, 255, 0.05);
    padding: 1.5rem;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    text-align: center;
}

.score-display {
    font-size: 2.5rem;
    font-weight: 800;
    font-family: var(--font-heading);
    color: var(--accent-color);
}

.altitude-value {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--secondary-color);
}

.dashboard-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-bottom: 2rem;
}

.component-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 0.75rem;
    margin: 1.5rem 0;
}

.component-tag {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    padding: 0.5rem 0.75rem;
    border-radius: 8px;
    font-size: 0.8rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    cursor: pointer;
    /* INTERACTIVE INDICATOR */
    transition: all 0.2s ease;
}

.component-tag:hover {
    background: rgba(255, 255, 255, 0.08);
    /* HOVER EFFECT */
    transform: translateY(-1px);
}

.component-tag.present {
    border-color: var(--success-color);
    color: var(--text-primary);
    background: rgba(16, 185, 129, 0.1);
}

.button-group {
    display: flex;
    justify-content: space-between;
    /* Ensures Back is Left, Action is Right */
    gap: 1rem;
    margin-top: 2rem;
}

.v2-back-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    min-width: 120px;
}

.control-row {
    display: flex;
    gap: 2rem;
    align-items: flex-end;
}

.control-group {
    flex: 1;
}

.v2-select {
    width: 100%;
    margin-top: 0.5rem;
    background: var(--bg-accent);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.75rem;
    border-radius: 12px;
    font-family: var(--font-main);
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='white' 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");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    background-size: 1rem;
}

.level-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.5rem;
    margin-top: 0.5rem;
}

.level-btn {
    background: var(--bg-accent);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 0.75rem;
    font-size: 0.85rem;
    cursor: pointer;
    border-radius: 12px;
}

.level-btn.selected {
    border-color: var(--secondary-color);
    color: var(--secondary-color);
    background: rgba(167, 139, 250, 0.1);
}

.efficiency-banner {
    background: linear-gradient(90deg, var(--success-color), var(--accent-color));
    color: var(--bg-dark);
    padding: 1rem;
    border-radius: 12px;
    font-weight: 700;
    text-align: center;
    margin-bottom: 1.5rem;
}

.diff-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.diff-lane {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.prompt-box {
    background: #000;
    padding: 1rem;
    border-radius: 12px;
    font-family: 'Fira Code', monospace;
    font-size: 0.85rem;
    line-height: 1.5;
    min-height: 200px;
    white-space: pre-wrap;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}

.prompt-box.highlighted {
    border-color: var(--accent-glow);
    box-shadow: 0 0 15px var(--accent-glow);
}

.action-bar {
    margin-top: 2rem;
    display: flex;
    justify-content: center;
}

.badge {
    background: var(--secondary-color);
    color: var(--bg-dark);
    font-size: 0.7rem;
    padding: 2px 6px;
    border-radius: 4px;
    vertical-align: middle;
}

@media (max-width: 640px) {

    .dashboard-grid,
    .diff-container {
        grid-template-columns: 1fr;
    }
}