/* ============================================
   rustnzbd Website — Dark theme, Usenet-inspired
   ============================================ */

/* --- Reset & Base --- */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg-primary: #0e1525;
    --bg-secondary: #141c30;
    --bg-tertiary: #1a2540;
    --bg-card: #161e34;
    --bg-code: #0c1220;
    --text-primary: #e0e4ef;
    --text-secondary: #8890a8;
    --text-muted: #555e78;
    --accent: #4ea8de;
    --accent-hover: #6bc0f0;
    --accent-dim: rgba(78, 168, 222, 0.1);
    --accent-glow: rgba(78, 168, 222, 0.3);
    --green: #4caf50;
    --blue: #4a9eff;
    --yellow: #ffc107;
    --orange: #ff9800;
    --red: #f44336;
    --purple: #9c27b0;
    --border: #222e48;
    --border-light: #2e3c58;
    --nav-bg: rgba(14, 21, 37, 0.95);
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.4);
    --radius: 8px;
    --radius-lg: 12px;
    --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-mono: "SF Mono", "Fira Code", "Fira Mono", "Roboto Mono", Menlo, monospace;
    --container: 1140px;
    --nav-height: 64px;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--nav-height);
}

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

a {
    color: var(--accent);
    text-decoration: none;
    transition: color 0.2s;
}

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

img {
    max-width: 100%;
    height: auto;
}

.container {
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 24px;
}

.accent-text {
    color: var(--accent);
}

/* --- Navigation --- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    background: var(--nav-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    z-index: 1000;
    transition: box-shadow 0.3s;
}

.navbar.scrolled {
    box-shadow: var(--shadow);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.nav-brand {
    font-size: 1.3rem;
    font-weight: 700;
    text-decoration: none;
    color: var(--text-primary);
}

.nav-logo-text {
    color: var(--accent);
}

.nav-logo-accent {
    color: var(--text-primary);
}

.nav-brand:hover {
    color: var(--text-primary);
    text-decoration: none;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 28px;
    align-items: center;
}

.nav-menu a {
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.2s;
    text-decoration: none;
}

.nav-menu a:hover {
    color: var(--text-primary);
    text-decoration: none;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
    cursor: pointer;
    background: none;
    border: none;
}

.nav-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all 0.3s;
}

/* --- Hero --- */
.hero {
    padding: 140px 0 80px;
    text-align: center;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 12px;
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-size: 1.3rem;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.hero-description {
    max-width: 640px;
    margin: 0 auto 28px;
    color: var(--text-secondary);
    font-size: 1.05rem;
    line-height: 1.7;
}

.hero-badges {
    display: flex;
    justify-content: center;
    gap: 10px;
    flex-wrap: wrap;
    margin-bottom: 32px;
}

.badge {
    display: inline-flex;
    align-items: center;
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    border: 1px solid var(--border-light);
    background: var(--bg-secondary);
    color: var(--text-secondary);
}

.badge-rust { color: #ce422b; border-color: rgba(206, 66, 43, 0.3); background: rgba(206, 66, 43, 0.08); }
.badge-proto { color: var(--accent); border-color: rgba(78, 168, 222, 0.3); background: rgba(78, 168, 222, 0.08); }
.badge-docker { color: var(--blue); border-color: rgba(74, 158, 255, 0.3); background: rgba(74, 158, 255, 0.08); }
.badge-api { color: var(--green); border-color: rgba(76, 175, 80, 0.3); background: rgba(76, 175, 80, 0.08); }
.badge-web { color: var(--orange); border-color: rgba(255, 152, 0, 0.3); background: rgba(255, 152, 0, 0.08); }

.hero-buttons {
    display: flex;
    justify-content: center;
    gap: 14px;
    flex-wrap: wrap;
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: var(--radius);
    font-weight: 600;
    font-size: 0.9rem;
    text-decoration: none;
    transition: all 0.2s;
    cursor: pointer;
    border: none;
}

.btn:hover { text-decoration: none; }

.btn-primary {
    background: var(--accent);
    color: #fff;
}

.btn-primary:hover {
    background: var(--accent-hover);
    color: #fff;
}

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

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

/* --- Status Banner --- */
.status-banner {
    padding: 0 0 40px;
}

.status-card {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 20px 24px;
    background: rgba(78, 168, 222, 0.06);
    border: 1px solid rgba(78, 168, 222, 0.2);
    border-radius: var(--radius-lg);
}

.status-icon {
    color: var(--accent);
    flex-shrink: 0;
    margin-top: 2px;
}

.status-text strong {
    display: block;
    color: var(--accent);
    margin-bottom: 4px;
}

.status-text span {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* --- Section Styles --- */
.section-title {
    font-size: 2rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 8px;
}

.section-subtitle {
    text-align: center;
    color: var(--text-secondary);
    font-size: 1.05rem;
    margin-bottom: 48px;
}

/* --- Features --- */
.features {
    padding: 80px 0;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 28px 24px;
    transition: border-color 0.2s, transform 0.2s;
}

.feature-card:hover {
    border-color: var(--border-light);
    transform: translateY(-2px);
}

.feature-icon {
    color: var(--accent);
    margin-bottom: 16px;
}

.feature-card h3 {
    font-size: 1.05rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.88rem;
    line-height: 1.6;
}

/* --- Architecture --- */
.architecture {
    padding: 80px 0;
    background: var(--bg-secondary);
}

.arch-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.arch-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 24px;
}

.arch-label {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--accent);
    margin-bottom: 16px;
}

.arch-items {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.arch-items span {
    display: inline-block;
    padding: 4px 12px;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 0.82rem;
    color: var(--text-secondary);
}

/* --- Benchmarks --- */
.benchmarks {
    padding: 80px 0;
}

.bench-info {
    max-width: 760px;
    margin: 0 auto 48px;
}

.bench-info-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 28px 32px;
}

.bench-info-card h3 {
    font-size: 1.2rem;
    color: var(--accent);
    margin-bottom: 12px;
    font-family: var(--font-mono);
}

.bench-info-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
}

.bench-detail-title {
    text-align: center;
    font-size: 1.4rem;
    font-weight: 600;
    margin-bottom: 6px;
}

.bench-detail-subtitle {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 24px;
}

.bench-scenarios {
    display: flex;
    flex-direction: column;
    gap: 8px;
    max-width: 760px;
    margin: 0 auto 32px;
}

.bench-scenario {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    transition: border-color 0.2s;
}

.bench-scenario[open] {
    border-color: var(--border-light);
}

.bench-scenario summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 20px;
    cursor: pointer;
    user-select: none;
    list-style: none;
    transition: background 0.2s;
}

.bench-scenario summary::-webkit-details-marker {
    display: none;
}

.bench-scenario summary::before {
    content: "";
    display: inline-block;
    width: 6px;
    height: 6px;
    border-right: 2px solid var(--text-muted);
    border-bottom: 2px solid var(--text-muted);
    transform: rotate(-45deg);
    margin-right: 14px;
    flex-shrink: 0;
    transition: transform 0.2s;
}

.bench-scenario[open] summary::before {
    transform: rotate(45deg);
}

.bench-scenario summary:hover {
    background: var(--bg-secondary);
}

.bench-scenario-name {
    font-weight: 600;
    font-size: 0.95rem;
}

.bench-scenario-badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.78rem;
    font-weight: 600;
    background: rgba(78, 168, 222, 0.1);
    color: var(--accent);
    border: 1px solid rgba(78, 168, 222, 0.25);
    flex-shrink: 0;
    margin-left: 12px;
}

.bench-scenario-body {
    padding: 16px 20px 20px;
    border-top: 1px solid var(--border);
}

.bench-scenario-body p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
}

.bench-methodology {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.82rem;
    max-width: 640px;
    margin: 0 auto;
    line-height: 1.6;
}

/* --- Demo Preview --- */
.demo-section {
    padding: 80px 0;
    background: var(--bg-secondary);
}

.demo-preview {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    max-width: 900px;
    margin: 0 auto 28px;
}

.demo-bar {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 16px;
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border);
}

.demo-dots {
    display: flex;
    gap: 6px;
}

.demo-dots span {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--border-light);
}

.demo-dots span:first-child { background: #ff5f57; }
.demo-dots span:nth-child(2) { background: #ffbd2e; }
.demo-dots span:nth-child(3) { background: #28c840; }

.demo-url {
    flex: 1;
    text-align: center;
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--text-muted);
    background: var(--bg-primary);
    padding: 4px 16px;
    border-radius: 4px;
}

.demo-body {
    padding: 20px;
}

.demo-header-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border);
}

.demo-title-text {
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--accent);
}

.demo-stats-text {
    font-size: 0.82rem;
    color: var(--text-muted);
}

.demo-tabs-row {
    display: flex;
    gap: 0;
    margin-bottom: 16px;
    border-bottom: 1px solid var(--border);
}

.demo-tab {
    padding: 8px 16px;
    font-size: 0.82rem;
    color: var(--text-muted);
    font-weight: 500;
    border-bottom: 2px solid transparent;
}

.demo-tab-active {
    color: var(--accent);
    border-bottom-color: var(--accent);
}

.demo-table {
    width: 100%;
    border-collapse: collapse;
}

.demo-table th {
    text-align: left;
    font-size: 0.72rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    padding: 8px 12px;
    border-bottom: 1px solid var(--border);
}

.demo-table td {
    padding: 10px 12px;
    font-size: 0.85rem;
    border-bottom: 1px solid var(--border);
    color: var(--text-secondary);
}

.demo-name {
    color: var(--text-primary) !important;
    font-weight: 500;
}

.demo-progress {
    display: inline-block;
    width: 80px;
    height: 6px;
    background: var(--bg-primary);
    border-radius: 3px;
    overflow: hidden;
    vertical-align: middle;
    margin-right: 8px;
}

.demo-progress-bar {
    height: 100%;
    border-radius: 3px;
    transition: width 0.3s;
}

.demo-downloading { background: var(--blue); }
.demo-verifying { background: var(--orange); }
.demo-completed { background: var(--green); }

.demo-pct {
    font-size: 0.78rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
}

.demo-speed {
    font-family: var(--font-mono);
    font-size: 0.82rem !important;
    color: var(--accent) !important;
}

.demo-speed.demo-muted {
    color: var(--text-muted) !important;
}

.demo-status {
    display: inline-block;
    padding: 2px 10px;
    border-radius: 10px;
    font-size: 0.75rem;
    font-weight: 600;
}

.demo-status-downloading { background: rgba(33, 150, 243, 0.15); color: var(--blue); }
.demo-status-verifying { background: rgba(255, 152, 0, 0.15); color: var(--orange); }
.demo-status-completed { background: rgba(76, 175, 80, 0.15); color: var(--green); }

.demo-cta {
    text-align: center;
}

/* --- Getting Started --- */
.getting-started {
    padding: 80px 0;
}

.start-tabs {
    display: flex;
    justify-content: center;
    gap: 4px;
    margin-bottom: 32px;
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 4px;
    max-width: 280px;
    margin-left: auto;
    margin-right: auto;
}

.start-tab {
    flex: 1;
    padding: 10px 20px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.9rem;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s;
    font-family: var(--font);
}

.start-tab.active {
    background: var(--accent);
    color: #fff;
}

.start-pane {
    display: none;
    max-width: 700px;
    margin: 0 auto;
}

.start-pane.active {
    display: block;
}

.terminal {
    background: var(--bg-code);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    margin-bottom: 20px;
}

.terminal-bar {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 16px;
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border);
}

.terminal-dots {
    display: flex;
    gap: 6px;
}

.terminal-dots span {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.terminal-dots span:first-child { background: #ff5f57; }
.terminal-dots span:nth-child(2) { background: #ffbd2e; }
.terminal-dots span:nth-child(3) { background: #28c840; }

.terminal-title {
    font-size: 0.78rem;
    color: var(--text-muted);
}

.terminal-body {
    padding: 20px;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    line-height: 1.8;
}

.terminal-line {
    white-space: pre-wrap;
    word-break: break-all;
}

.terminal-prompt {
    color: var(--green);
    margin-right: 8px;
    user-select: none;
}

.terminal-output {
    color: var(--text-muted);
    margin-top: 8px;
}

.terminal-success {
    color: var(--green);
}

.terminal-link {
    color: var(--accent);
}

.start-notes {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.start-notes p {
    color: var(--text-secondary);
    font-size: 0.88rem;
}

.start-notes code {
    background: var(--bg-code);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 0.82rem;
    color: var(--accent);
}

/* --- Pipeline / How it works --- */
.how-it-works {
    padding: 80px 0;
    background: var(--bg-secondary);
}

.pipeline {
    display: flex;
    align-items: flex-start;
    gap: 0;
    max-width: 1100px;
    margin: 0 auto;
    flex-wrap: wrap;
    justify-content: center;
}

.pipeline-step {
    flex: 1;
    min-width: 160px;
    max-width: 200px;
    text-align: center;
}

.pipeline-number {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--accent);
    color: #fff;
    font-weight: 700;
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 12px;
}

.pipeline-content h3 {
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 6px;
}

.pipeline-content p {
    font-size: 0.8rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.pipeline-content code {
    background: var(--bg-code);
    padding: 1px 4px;
    border-radius: 3px;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--accent);
}

.pipeline-arrow {
    display: flex;
    align-items: center;
    color: var(--text-muted);
    padding: 20px 8px 0;
}

/* --- Footer --- */
.footer {
    padding: 24px 0;
    border-top: 1px solid var(--border);
}

.footer-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-left {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.footer-brand {
    font-weight: 700;
    font-size: 1rem;
    color: var(--text-primary);
}

.footer-sep {
    color: var(--border-light);
}

.footer-right a {
    color: var(--text-muted);
    transition: color 0.2s;
}

.footer-right a:hover {
    color: var(--text-primary);
}

/* --- Responsive --- */
@media (max-width: 1024px) {
    .feature-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

    .pipeline-arrow {
        display: none;
    }

    .pipeline {
        gap: 20px;
    }
}

@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }

    .nav-menu {
        display: none;
        position: absolute;
        top: var(--nav-height);
        left: 0;
        right: 0;
        background: var(--bg-primary);
        border-bottom: 1px solid var(--border);
        flex-direction: column;
        padding: 16px 24px;
        gap: 12px;
    }

    .nav-menu.open {
        display: flex;
    }

    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }

    .hero {
        padding: 110px 0 60px;
    }

    .hero-title {
        font-size: 2.4rem;
    }

    .hero-subtitle {
        font-size: 1.1rem;
    }

    .feature-grid,
    .arch-grid {
        grid-template-columns: 1fr;
    }

    .section-title {
        font-size: 1.6rem;
    }

    .status-card {
        flex-direction: column;
        gap: 12px;
    }

    .footer-inner {
        flex-direction: column;
        gap: 12px;
        text-align: center;
    }

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

    .demo-table th:nth-child(4),
    .demo-table td:nth-child(4) {
        display: none;
    }

    .demo-header-row {
        flex-direction: column;
        gap: 8px;
        align-items: flex-start;
    }

    .pipeline-step {
        min-width: 120px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        justify-content: center;
        max-width: 280px;
    }

    .demo-tabs-row {
        display: none;
    }
}