/* Benchmark Interface Styles - Consistent with Portfolio */
:root {
    /* Colors from portfolio */
    --bg-primary: #000000;
    --bg-secondary: #050505;
    --bg-tertiary: #0a0a0a;
    --bg-card: #111111;
    --bg-card-hover: #1a1a1a;
    
    --text-primary: #fafafa;
    --text-secondary: #b3b3b3;
    --text-tertiary: #6b6b6b;
    
    --border-primary: rgba(255, 255, 255, 0.08);
    --border-secondary: rgba(255, 255, 255, 0.04);
    --border-hover: rgba(255, 255, 255, 0.12);
    
    --accent: #3b82f6;
    --accent-dimmed: rgba(59, 130, 246, 0.1);
    
    /* Status colors */
    --correct: #10b981;
    --correct-bg: rgba(16, 185, 129, 0.1);
    --incorrect: #ef4444;
    --incorrect-bg: rgba(239, 68, 68, 0.1);
    
    /* Benchmark specific - subtle, dark theme colors */
    --benchmark-math: #2563eb;
    --benchmark-code: #059669;
    --benchmark-knowledge: #7c3aed;
    --benchmark-reasoning: #d97706;
    --benchmark-advanced: #dc2626;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.font-mono {
    font-family: 'JetBrains Mono', 'SF Mono', monospace;
}

/* Navigation */
.benchmark-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 1rem 0;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-primary);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-left {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.nav-back {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-back:hover {
    color: var(--text-primary);
}

.nav-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
}

.nav-info {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.difficulty-badge, .category-badge {
    padding: 0.25rem 0.75rem;
    border-radius: 0.375rem;
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.difficulty-easy { background: rgba(5, 150, 105, 0.15); color: #10b981; }
.difficulty-medium { background: rgba(217, 119, 6, 0.15); color: #f59e0b; }
.difficulty-hard { background: rgba(220, 38, 38, 0.15); color: #ef4444; }
.difficulty-frontier { background: rgba(124, 58, 237, 0.15); color: #8b5cf6; }
.difficulty-level_1, .difficulty-level_2, .difficulty-level_3 { background: rgba(217, 119, 6, 0.15); color: #f59e0b; }
.difficulty-level_4, .difficulty-level_5 { background: rgba(220, 38, 38, 0.15); color: #ef4444; }

.category-math { background: rgba(37, 99, 235, 0.15); color: #3b82f6; }
.category-code { background: rgba(5, 150, 105, 0.15); color: #10b981; }
.category-knowledge { background: rgba(124, 58, 237, 0.15); color: #8b5cf6; }
.category-reasoning { background: rgba(217, 119, 6, 0.15); color: #f59e0b; }
.category-advanced { background: rgba(220, 38, 38, 0.15); color: #ef4444; }

/* Stats */
.stats-container {
    display: flex;
    gap: 1rem;
    font-size: 0.875rem;
}

.stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 0.5rem;
    background: var(--bg-card);
    border-radius: 0.5rem;
    min-width: 80px;
}

.stat-value {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    font-family: 'JetBrains Mono', monospace;
}

.stat-label {
    font-size: 0.625rem;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Main Container */
.benchmark-container {
    max-width: 900px;
    margin: 0 auto;
    padding: 8rem 1.5rem 4rem;
}

/* Loading */
.loading-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 4rem;
    text-align: center;
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-primary);
    border-radius: 50%;
    border-top-color: var(--accent);
    animation: spin 1s ease-in-out infinite;
    margin-bottom: 1rem;
}

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

/* Question Card */
.question-card {
    background: var(--bg-card);
    border: 1px solid var(--border-primary);
    border-radius: 1rem;
    overflow: hidden;
    margin-bottom: 2rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.question-header {
    padding: 1.5rem 2rem;
    border-bottom: 1px solid var(--border-primary);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.question-header-right {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.view-raw-btn {
    padding: 0.375rem 0.75rem;
    border: 1px solid var(--border-primary);
    border-radius: 0.375rem;
    background: var(--bg-tertiary);
    color: var(--text-tertiary);
    font-size: 0.75rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
}

.view-raw-btn:hover {
    background: var(--bg-card-hover);
    color: var(--text-secondary);
    border-color: var(--border-hover);
}

.view-raw-btn.active {
    background: var(--accent-dimmed);
    color: var(--accent);
    border-color: var(--accent);
}

.question-meta {
    display: flex;
    gap: 0.75rem;
    align-items: center;
}

.question-id {
    font-size: 0.875rem;
    color: var(--text-tertiary);
    font-family: 'JetBrains Mono', monospace;
}

.question-content {
    padding: 2rem;
}

.question-text {
    font-size: 1.125rem;
    line-height: 1.7;
    margin-bottom: 2rem;
    color: var(--text-primary);
}

/* Code blocks */
.question-text pre {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-primary);
    border-radius: 0.5rem;
    padding: 1rem;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.875rem;
    border-radius: 0.75rem;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    background: var(--bg-card);
    position: relative;
}

.choice-item:hover {
    border-color: var(--border-hover);
    background: var(--bg-card-hover);
    transform: translateY(-1px);
}

.choice-item.selected {
    border-color: var(--accent);
    background: var(--accent-dimmed);
}

.choice-item.correct {
    border-color: var(--correct);
    background: var(--correct-bg);
}

.choice-item.incorrect {
    border-color: var(--incorrect);
    background: var(--incorrect-bg);
}

.choice-item.disabled {
    cursor: not-allowed;
    opacity: 0.7;
}

/* Text Input */
.text-input-container {
    margin-bottom: 2rem;
}

.text-input-label {
    display: block;
    margin-bottom: 0.75rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.text-input {
    width: 100%;
    padding: 1rem 1.5rem;
    border: 2px solid var(--border-primary);
    border-radius: 0.75rem;
    background: var(--bg-card);
    color: var(--text-primary);
    font-size: 1rem;
    transition: border-color 0.3s;
}

.text-input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.text-input:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

/* Code Input */
.code-input {
    font-family: 'JetBrains Mono', monospace;
    min-height: 200px;
    resize: vertical;
}

/* Buttons */
.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 0.5rem;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--text-primary);
    color: var(--bg-primary);
}

.btn-primary:hover {
    background: var(--text-secondary);
    transform: translateY(-1px);
}

.btn-secondary {
    background: transparent;
    color: var(--text-secondary);
    border: 2px solid var(--border-primary);
}

.btn-secondary:hover {
    color: var(--text-primary);
    border-color: var(--border-hover);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
}

.btn-submit {
    width: 100%;
    margin-bottom: 2rem;
}

/* Feedback */
.feedback-container {
    background: var(--bg-card);
    border: 1px solid var(--border-primary);
    border-radius: 1rem;
    padding: 2rem;
    margin-top: 2rem;
}

.result-message {
    font-size: 1.25rem;
    font-weight: 600;
    text-align: center;
    padding: 1rem;
    border-radius: 0.75rem;
    margin-bottom: 1.5rem;
}

.result-correct {
    background: var(--correct-bg);
    color: var(--correct);
    border: 1px solid var(--correct);
}

.result-incorrect {
    background: var(--incorrect-bg);
    color: var(--incorrect);
    border: 1px solid var(--incorrect);
}

.correct-answer {
    margin-bottom: 1.5rem;
    padding: 1rem;
    background: var(--bg-secondary);
    border-radius: 0.5rem;
    border-left: 4px solid var(--correct);
}

.explanation {
    margin: 1.5rem 0;
    padding: 1.5rem;
    background: var(--bg-secondary);
    border-radius: 0.75rem;
    border-left: 4px solid var(--accent);
}

.explanation h3 {
    margin-bottom: 1rem;
    color: var(--accent);
}

.explanation-content {
    line-height: 1.7;
    color: var(--text-secondary);
}

.author-info {
    margin-top: 1rem;
    font-size: 0.875rem;
    color: var(--text-tertiary);
    font-style: italic;
}

/* Action buttons */
.action-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-top: 2rem;
}

/* Filter Controls */
.filter-controls {
    background: var(--bg-card);
    border: 1px solid var(--border-primary);
    border-radius: 1rem;
    padding: 1.5rem;
    margin-bottom: 2rem;
}

.filter-row {
    display: grid;
    grid-template-columns: 1fr 1fr 1.5fr auto auto;
    gap: 1rem;
    align-items: end;
    width: 100%;
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    min-width: 0;
}

.filter-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.filter-select {
    padding: 0.5rem 1rem;
    border: 2px solid var(--border-primary);
    border-radius: 0.5rem;
    background: var(--bg-card);
    color: var(--text-primary);
    font-size: 0.875rem;
    cursor: pointer;
}

.filter-input {
    padding: 0.5rem 1rem;
    border: 2px solid var(--border-primary);
    border-radius: 0.5rem;
    background: var(--bg-card);
    color: var(--text-primary);
    font-size: 0.875rem;
    min-width: 150px;
}

.filter-row .btn {
    height: fit-content;
    padding: 0.5rem 1rem;
    align-self: end;
    white-space: nowrap;
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .nav-container {
        padding: 0 1rem;
    }
    
    .nav-info {
        display: none;
    }
    
    .benchmark-container {
        padding: 6rem 1rem 2rem;
    }
    
    .filter-row {
        grid-template-columns: 1fr;
        gap: 1rem;
        align-items: stretch;
    }
    
    .filter-group {
        width: 100%;
    }
    
    .filter-select,
    .filter-input {
        width: 100%;
        min-width: unset;
    }
    
    .question-content {
        padding: 1.5rem;
    }
    
    .question-header {
        padding: 1rem 1.5rem;
        flex-direction: column;
        gap: 0.5rem;
        align-items: flex-start;
    }
    
    .stats-container {
        flex-wrap: wrap;
        gap: 0.5rem;
    }
    
    .action-buttons {
        flex-direction: column;
    }
    
    .filter-row {
        flex-direction: column;
        align-items: stretch;
    }
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-fade-in {
    animation: fadeInUp 0.5s ease-out forwards;
}

/* Confetti animation - quick explosion */
@keyframes confetti-fall {
    0% {
        transform: translateY(-20px) rotate(0deg) scale(1);
        opacity: 1;
    }
    50% {
        transform: translateY(30vh) rotate(360deg) scale(0.8);
        opacity: 0.8;
    }
    100% {
        transform: translateY(60vh) rotate(720deg) scale(0.3);
        opacity: 0;
    }
}

.confetti {
    position: fixed;
    width: 8px;
    height: 8px;
    background: var(--correct);
    z-index: 9999;
    pointer-events: none;
    animation: confetti-fall 1.2s ease-out forwards;
}

/* Category Layout Styles for Landing Page */
.category-section {
    margin-bottom: 3rem;
}

.category-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    border-bottom: 2px solid var(--border-primary);
    padding-bottom: 0.5rem;
}

.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(380px, 1fr));
    gap: 2rem;
}

/* Mobile responsive for categories */
@media (max-width: 768px) {
    .category-grid {
        grid-template-columns: 1fr;
    }
    
    .category-section {
        margin-bottom: 2rem;
    }
}