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

:root {
    --bg-primary: #0a0a0a;
    --bg-secondary: #1a1a1a;
    --bg-tertiary: #2a2a2a;
    --bg-quaternary: #151515;
    --text-primary: #ffffff;
    --text-secondary: #cccccc;
    --text-muted: #888888;
    --text-code: #e1e1e1;
    --accent-primary: #dc2626;
    --accent-secondary: #991b1b;
    --accent-tertiary: #7c2d12;
    --accent-danger: #ff6b6b;
    --accent-warning: #ffaa00;
    --accent-excellent: #dc2626;
    --accent-good: #991b1b;
    --border-color: #333333;
    --border-light: #404040;
    --shadow-color: rgba(0, 0, 0, 0.7);
    --gradient-primary: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    --gradient-secondary: linear-gradient(135deg, var(--accent-secondary), var(--accent-tertiary));
    --gradient-danger: linear-gradient(135deg, var(--accent-danger), #ff8e8e);
    --font-mono: 'JetBrains Mono', 'Fira Code', 'Monaco', monospace;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', roboto, sans-serif;
}

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

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(circle at 20% 20%, rgba(220, 38, 38, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(153, 27, 27, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 40% 60%, rgba(124, 45, 18, 0.05) 0%, transparent 50%),
        linear-gradient(180deg, var(--bg-primary) 0%, #0f0f0f 100%);
    pointer-events: none;
    z-index: -1;
}

.container {
    max-width: 1600px;
    margin: 0 auto;
    padding: 0 20px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.header {
    text-align: center;
    padding: 40px 0 30px;
    animation: fadeInUp 0.8s ease;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 40px;
}

.logo {
    font-size: 3rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 8px;
    letter-spacing: -1px;
    font-family: var(--font-mono);
}

.tagline {
    font-size: 1.1rem;
    color: var(--text-secondary);
    font-weight: 400;
    margin-bottom: 15px;
}

.server-info {
    margin-top: 15px;
}

.server-badge {
    background: var(--bg-tertiary);
    color: var(--accent-secondary);
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    border: 1px solid var(--accent-secondary);
    font-family: var(--font-mono);
}

.server-badge.error {
    color: var(--accent-danger);
    border-color: var(--accent-danger);
}

.main {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 50px;
}

.speed-test-section {
    animation: fadeInUp 0.8s ease 0.2s both;
}

.speed-test-container {
    background: var(--bg-secondary);
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 20px 60px var(--shadow-color);
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

.speed-test-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient-primary);
}

.test-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    flex-wrap: wrap;
    gap: 20px;
}

.test-header h2 {
    font-size: 1.8rem;
    font-weight: 600;
    color: var(--text-primary);
}

.test-metrics {
    display: flex;
    gap: 30px;
    flex-wrap: wrap;
}

.metric {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.metric-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 4px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-family: var(--font-mono);
}

.metric-value {
    font-size: 1rem;
    font-weight: 600;
    color: var(--accent-secondary);
    font-family: var(--font-mono);
}

.speed-display {
    display: flex;
    justify-content: center;
    margin-bottom: 30px;
}

.speed-gauge {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.speed-value {
    position: absolute;
    display: flex;
    flex-direction: column;
    align-items: center;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -25%);
}

.speed-value span:first-child {
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--text-primary);
    transition: all 0.3s ease;
    font-family: var(--font-mono);
}

.unit {
    font-size: 1.1rem;
    color: var(--text-muted);
    font-weight: 500;
}

.speed-type {
    font-size: 0.9rem;
    color: var(--accent-secondary);
    margin-top: 8px;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-family: var(--font-mono);
}

.test-controls {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
    margin-bottom: 30px;
}

.test-button {
    background: var(--gradient-primary);
    border: none;
    border-radius: 14px;
    padding: 18px 50px;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--bg-primary);
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    min-width: 220px;
    font-family: var(--font-sans);
}

.test-button:hover:not(.loading) {
    transform: translateY(-2px);
    box-shadow: 0 12px 35px rgba(0, 255, 136, 0.4);
}

.test-button.loading .button-text {
    opacity: 0;
}

.test-button.loading .button-loader {
    opacity: 1;
}

.button-loader {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 24px;
    height: 24px;
    border: 2px solid var(--bg-primary);
    border-top: 2px solid transparent;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.test-progress {
    width: 100%;
    max-width: 500px;
    text-align: center;
}

.progress-bar {
    width: 100%;
    height: 6px;
    background: var(--bg-tertiary);
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: 10px;
}

.progress-fill {
    height: 100%;
    background: var(--gradient-primary);
    width: 0%;
    transition: width 0.3s ease;
    border-radius: 3px;
}

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

.results-summary {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 15px;
    transition: opacity 0.3s ease;
}

.result-item {
    background: var(--bg-tertiary);
    padding: 20px 15px;
    border-radius: 12px;
    text-align: center;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.result-item:hover {
    border-color: var(--accent-secondary);
    transform: translateY(-2px);
}

.result-item.primary {
    border-color: var(--accent-primary);
    background: linear-gradient(135deg, var(--bg-tertiary), rgba(0, 255, 136, 0.05));
}

.result-item .label {
    display: block;
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-family: var(--font-mono);
}

.result-item .value {
    display: block;
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--accent-primary);
    margin-bottom: 4px;
    font-family: var(--font-mono);
}

.result-item .technical {
    display: block;
    font-size: 0.8rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
}

.performance-section {
    animation: fadeInUp 0.8s ease 0.4s both;
}

.performance-section h2 {
    font-size: 2.2rem;
    margin-bottom: 35px;
    text-align: center;
    font-weight: 600;
}

.performance-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
}

.performance-card {
    background: var(--bg-secondary);
    padding: 25px;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.performance-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px var(--shadow-color);
    border-color: var(--accent-secondary);
}

.performance-card.primary {
    border-color: var(--accent-primary);
    background: linear-gradient(135deg, var(--bg-secondary), rgba(0, 255, 136, 0.03));
}

.performance-card h3 {
    font-size: 1.1rem;
    margin-bottom: 20px;
    color: var(--text-primary);
    font-weight: 600;
}

.score-circle {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    background: conic-gradient(var(--accent-primary) 0deg, var(--bg-tertiary) 0deg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 15px;
    position: relative;
}

.score-circle::before {
    content: '';
    position: absolute;
    width: 70px;
    height: 70px;
    background: var(--bg-secondary);
    border-radius: 50%;
}

.score-circle span {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text-primary);
    z-index: 1;
    font-family: var(--font-mono);
}

.score-details {
    text-align: center;
}

.score-explanation {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.4;
}

.score-bar-container {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 10px;
}

.score-bar {
    flex: 1;
    height: 10px;
    background: var(--bg-tertiary);
    border-radius: 5px;
    overflow: hidden;
    position: relative;
}

.score-fill {
    height: 100%;
    width: 0%;
    background: var(--accent-primary);
    border-radius: 5px;
    transition: width 1.2s ease, background-color 0.3s ease;
}

.score-value {
    min-width: 30px;
    text-align: right;
    font-weight: 600;
    color: var(--accent-primary);
    font-family: var(--font-mono);
}

.score-breakdown {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
    margin: 0;
}

.technical-details {
    animation: fadeInUp 0.8s ease 0.5s both;
}

.technical-details h2 {
    font-size: 2.2rem;
    margin-bottom: 35px;
    text-align: center;
    font-weight: 600;
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 25px;
}

.tech-card {
    background: var(--bg-secondary);
    padding: 25px;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.tech-card:hover {
    border-color: var(--accent-tertiary);
    transform: translateY(-2px);
}

.tech-card h4 {
    font-size: 1.2rem;
    margin-bottom: 20px;
    color: var(--accent-tertiary);
    font-weight: 600;
}

.tech-metrics {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.tech-metric {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 0;
    border-bottom: 1px solid var(--border-color);
}

.tech-metric:last-child {
    border-bottom: none;
}

.tech-metric span:first-child {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.tech-metric span:last-child {
    color: var(--accent-primary);
    font-weight: 600;
    font-family: var(--font-mono);
}

.connection-profile {
    color: var(--text-secondary);
    line-height: 1.6;
}

.connection-profile p {
    margin-bottom: 12px;
}

.connection-profile strong {
    color: var(--text-primary);
}

.comparisons-section {
    animation: fadeInUp 0.8s ease 0.6s both;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 35px;
    flex-wrap: wrap;
    gap: 20px;
}

.section-header h2 {
    font-size: 2.2rem;
    font-weight: 600;
}

.category-filters {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.filter-btn {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 10px 18px;
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.9rem;
    font-weight: 500;
}

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

.filter-btn.active {
    background: var(--gradient-primary);
    color: var(--bg-primary);
    border-color: transparent;
}

.comparisons-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(380px, 1fr));
    gap: 25px;
}

.comparison-card {
    background: var(--bg-secondary);
    padding: 25px;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
    animation: fadeInUp 0.5s ease;
}

.comparison-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 35px var(--shadow-color);
    border-color: var(--accent-secondary);
}

.comparison-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 15px;
    gap: 15px;
}

.comparison-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    flex: 1;
}

.size-badge {
    background: var(--bg-tertiary);
    color: var(--accent-secondary);
    padding: 6px 12px;
    border-radius: 15px;
    font-size: 0.8rem;
    font-weight: 600;
    border: 1px solid var(--accent-secondary);
    font-family: var(--font-mono);
    white-space: nowrap;
}

.comparison-description {
    color: var(--text-secondary);
    margin-bottom: 15px;
    font-size: 0.95rem;
}

.download-time {
    margin-bottom: 15px;
    padding: 12px;
    background: var(--bg-quaternary);
    border-radius: 8px;
    border-left: 3px solid var(--accent-primary);
}

.download-time strong {
    color: var(--accent-primary);
    font-family: var(--font-mono);
}

.comparison-fact {
    color: var(--text-muted);
    font-size: 0.9rem;
    font-style: italic;
    margin-bottom: 15px;
    line-height: 1.5;
}

.comparison-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 15px;
}

.tag {
    background: var(--bg-quaternary);
    color: var(--accent-tertiary);
    padding: 4px 8px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 500;
    border: 1px solid rgba(139, 92, 246, 0.3);
}

.comparison-status {
    margin-top: 15px;
}

.status-excellent {
    color: var(--accent-excellent);
    font-weight: 600;
}

.status-good {
    color: var(--accent-secondary);
    font-weight: 600;
}

.status-ok {
    color: var(--accent-warning);
    font-weight: 600;
}

.status-slow {
    color: var(--accent-danger);
    font-weight: 600;
}

.status-very-slow {
    color: #ff4444;
    font-weight: 600;
}

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

.stats-section {
    animation: fadeInUp 0.8s ease 0.7s both;
}

.stats-section h2 {
    font-size: 2.2rem;
    margin-bottom: 35px;
    text-align: center;
    font-weight: 600;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}

.stat-card {
    background: var(--bg-secondary);
    padding: 20px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-2px);
    border-color: var(--accent-tertiary);
    box-shadow: 0 8px 25px var(--shadow-color);
}

.stat-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 15px;
    gap: 15px;
}

.stat-header h4 {
    font-size: 1.1rem;
    color: var(--text-primary);
    font-weight: 600;
    flex: 1;
}

.stat-category {
    background: var(--bg-quaternary);
    color: var(--accent-tertiary);
    padding: 4px 8px;
    border-radius: 12px;
    font-size: 0.7rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.stat-value {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--accent-primary);
    margin-bottom: 10px;
    font-family: var(--font-mono);
}

.stat-description {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.5;
}

.footer {
    margin-top: 60px;
    padding: 30px 0;
    border-top: 1px solid var(--border-color);
    text-align: center;
}

.footer-content p {
    color: var(--text-muted);
    margin-bottom: 8px;
}

.footer-tech {
    font-size: 0.85rem;
    color: var(--accent-secondary);
    font-family: var(--font-mono);
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes spin {
    to {
        transform: translate(-50%, -50%) rotate(360deg);
    }
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.7;
    }
}

/* Responsive Design */
@media (max-width: 1024px) {
    .tech-grid {
        grid-template-columns: 1fr;
    }

    .test-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .test-metrics {
        width: 100%;
        justify-content: space-around;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }

    .header {
        padding: 30px 0 25px;
    }

    .logo {
        font-size: 2.2rem;
    }

    .tagline {
        font-size: 1rem;
    }

    .speed-test-container {
        padding: 30px 20px;
    }

    .main {
        gap: 35px;
    }

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

    .section-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .section-header h2 {
        font-size: 1.8rem;
    }

    .category-filters {
        width: 100%;
        justify-content: center;
    }

    .results-summary {
        grid-template-columns: repeat(2, 1fr);
    }

    .test-button {
        padding: 16px 40px;
        font-size: 1rem;
    }

    .speed-value span:first-child {
        font-size: 2.8rem;
    }

    .test-metrics {
        gap: 20px;
    }

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

@media (max-width: 480px) {
    .logo {
        font-size: 1.8rem;
    }

    .speed-test-container {
        padding: 25px 15px;
    }

    .results-summary {
        grid-template-columns: 1fr;
        gap: 12px;
    }

    .comparison-card,
    .stat-card,
    .tech-card {
        padding: 20px;
    }

    .section-header h2 {
        font-size: 1.6rem;
    }

    .speed-value span:first-child {
        font-size: 2.2rem;
    }

    #speedGauge {
        width: 280px;
        height: 280px;
    }

    .test-metrics {
        gap: 15px;
    }

    .metric {
        min-width: 80px;
    }

    .comparison-header {
        flex-direction: column;
        gap: 10px;
    }

    .size-badge {
        align-self: flex-start;
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --bg-primary: #000000;
        --bg-secondary: #111111;
        --text-primary: #ffffff;
        --border-color: #666666;
        --text-muted: #cccccc;
    }
}

/* 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;
    }
}

/* Focus styles for accessibility */
.test-button:focus,
.filter-btn:focus {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
}

/* Scroll behavior */
html {
    scroll-behavior: smooth;
}

/* Loading states */
.loading {
    pointer-events: none;
    opacity: 0.7;
}

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

::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
}

::-webkit-scrollbar-thumb {
    background: var(--accent-secondary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent-primary);
}