/* ================================================================
   CorvusTunnel Landing Page — Style
   Design: Dark, premium, glassmorphism, micro-animations
   ================================================================ */

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

:root {
    --bg: #0a0a0f;
    --bg-card: #111118;
    --bg-elevated: #16161f;
    --surface: #1a1a25;
    --border: rgba(255, 255, 255, 0.06);
    --border-hover: rgba(255, 255, 255, 0.12);

    --text: #e8e8ef;
    --text-muted: #8888a0;
    --text-dim: #55556a;

    --accent: #7c5cff;
    --accent-hover: #9178ff;
    --accent-glow: rgba(124, 92, 255, 0.25);
    --accent-2: #00d4aa;
    --accent-2-glow: rgba(0, 212, 170, 0.2);

    --pro: linear-gradient(135deg, #7c5cff 0%, #00d4aa 100%);
    --free: #00d4aa;

    --radius: 12px;
    --radius-lg: 20px;
    --radius-sm: 8px;

    --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --mono: 'JetBrains Mono', 'Fira Code', monospace;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
}

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

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ── Nav ──────────────────────────────────────────────────────── */
#nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: 16px 24px;
    transition: all 0.3s ease;
}

#nav.nav-scrolled {
    background: rgba(10, 10, 15, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    padding: 12px 24px;
}

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

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text);
    font-weight: 700;
    font-size: 18px;
}

.nav-logo-icon { font-size: 24px; }

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-links a {
    color: var(--text-muted);
    font-size: 14px;
    font-weight: 500;
    transition: color 0.2s;
}
.nav-links a:hover { color: var(--text); }

.nav-github {
    display: flex;
    align-items: center;
    gap: 6px;
    background: var(--surface);
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    transition: all 0.2s;
}
.nav-github:hover {
    background: var(--bg-elevated);
    border-color: var(--border-hover);
}

/* ── Hero ─────────────────────────────────────────────────────── */
#hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 120px 24px 80px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    overflow: hidden;
}

.hero-glow {
    position: absolute;
    border-radius: 50%;
    filter: blur(120px);
    opacity: 0.4;
    animation: glow-pulse 8s ease-in-out infinite;
}

.hero-glow-1 {
    width: 600px;
    height: 600px;
    background: var(--accent);
    top: -200px;
    right: -100px;
    animation-delay: 0s;
}

.hero-glow-2 {
    width: 500px;
    height: 500px;
    background: var(--accent-2);
    bottom: -200px;
    left: -100px;
    animation-delay: 4s;
}

@keyframes glow-pulse {
    0%, 100% { opacity: 0.3; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.1); }
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    border-radius: 100px;
    background: rgba(124, 92, 255, 0.1);
    border: 1px solid rgba(124, 92, 255, 0.2);
    color: var(--accent-hover);
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.5px;
    margin-bottom: 32px;
    animation: fadeInUp 0.6s ease;
}

.badge-dot {
    width: 6px;
    height: 6px;
    background: var(--accent-2);
    border-radius: 50%;
    animation: dot-pulse 2s ease-in-out infinite;
}

@keyframes dot-pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}

.hero-title {
    font-size: clamp(48px, 8vw, 80px);
    font-weight: 900;
    line-height: 1.05;
    letter-spacing: -2px;
    margin-bottom: 24px;
    animation: fadeInUp 0.6s ease 0.1s both;
}

.hero-gradient {
    background: var(--pro);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 18px;
    line-height: 1.7;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto 40px;
    animation: fadeInUp 0.6s ease 0.2s both;
}

.hero-cta {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
    animation: fadeInUp 0.6s ease 0.3s both;
}

.hero-install {
    display: flex;
    align-items: center;
    gap: 12px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 14px 20px;
    transition: all 0.3s;
}
.hero-install:hover {
    border-color: var(--accent);
    box-shadow: 0 0 30px var(--accent-glow);
}

.hero-install code {
    font-family: var(--mono);
    font-size: 15px;
    font-weight: 500;
    color: var(--accent-hover);
}

.copy-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 4px;
    transition: color 0.2s;
    display: flex;
}
.copy-btn:hover { color: var(--text); }

.hero-btn-secondary {
    padding: 14px 28px;
    border-radius: var(--radius);
    color: var(--text-muted);
    font-weight: 600;
    font-size: 14px;
    border: 1px solid var(--border);
    transition: all 0.3s;
}
.hero-btn-secondary:hover {
    color: var(--text);
    border-color: var(--border-hover);
    background: var(--surface);
}

.hero-stats {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 32px;
    margin-top: 56px;
    animation: fadeInUp 0.6s ease 0.4s both;
}

.stat { text-align: center; }
.stat-value {
    display: block;
    font-size: 24px;
    font-weight: 800;
    color: var(--text);
}
.stat-label {
    font-size: 12px;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 1px;
}
.stat-divider {
    width: 1px;
    height: 32px;
    background: var(--border);
}

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

/* ── Sections ─────────────────────────────────────────────────── */
.section {
    padding: 100px 0;
}
.section-dark {
    background: var(--bg-card);
}

.section-title {
    font-size: clamp(32px, 5vw, 48px);
    font-weight: 800;
    text-align: center;
    letter-spacing: -1px;
    margin-bottom: 12px;
}
.section-title-left {
    font-size: clamp(32px, 5vw, 44px);
    font-weight: 800;
    letter-spacing: -1px;
    margin-bottom: 20px;
}
.section-sub {
    text-align: center;
    color: var(--text-muted);
    font-size: 16px;
    margin-bottom: 56px;
}

/* ── Steps ────────────────────────────────────────────────────── */
.steps-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.step-card {
    position: relative;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 40px 32px;
    text-align: center;
    transition: all 0.3s;
}
.step-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-4px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.3);
}

.step-number {
    position: absolute;
    top: -16px;
    left: 50%;
    transform: translateX(-50%);
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--pro);
    color: white;
    font-weight: 700;
    font-size: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.step-icon {
    font-size: 40px;
    margin-bottom: 16px;
}

.step-card h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 12px;
}

.step-code {
    background: var(--surface);
    border-radius: var(--radius-sm);
    padding: 10px 16px;
    margin-bottom: 16px;
}
.step-code code {
    font-family: var(--mono);
    font-size: 13px;
    color: var(--accent-hover);
}

.step-card p {
    color: var(--text-muted);
    font-size: 14px;
}

/* ── Features ─────────────────────────────────────────────────── */
.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.feature-card {
    position: relative;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 32px 24px;
    transition: all 0.3s;
}
.feature-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-2px);
}

.feature-highlight {
    background: linear-gradient(135deg, rgba(124, 92, 255, 0.05), rgba(0, 212, 170, 0.05));
    border-color: rgba(124, 92, 255, 0.15);
}

.feature-icon {
    font-size: 32px;
    margin-bottom: 16px;
}

.feature-card h3 {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 8px;
}

.feature-card p {
    font-size: 13px;
    color: var(--text-muted);
    line-height: 1.6;
}

.feature-badge {
    display: inline-block;
    margin-top: 12px;
    padding: 3px 10px;
    border-radius: 100px;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.feature-badge.free {
    background: rgba(0, 212, 170, 0.1);
    color: var(--accent-2);
}
.feature-badge.pro {
    background: rgba(124, 92, 255, 0.1);
    color: var(--accent-hover);
}

/* ── Voice Demo ───────────────────────────────────────────────── */
.voice-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.voice-desc {
    color: var(--text-muted);
    font-size: 16px;
    line-height: 1.8;
    margin-bottom: 20px;
}
.voice-desc strong { color: var(--text); }
.voice-desc em { color: var(--accent-hover); font-style: normal; }

.voice-features {
    margin-top: 32px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.voice-feat {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 14px;
    color: var(--text-muted);
}
.voice-feat span { font-size: 18px; }

/* Phone frame */
.phone-frame {
    width: 300px;
    margin: 0 auto;
    background: #1c1c2a;
    border-radius: 36px;
    border: 3px solid #2a2a3e;
    padding: 12px;
    box-shadow:
        0 20px 60px rgba(0,0,0,0.5),
        0 0 80px var(--accent-glow);
}
.phone-notch {
    width: 100px;
    height: 6px;
    background: #2a2a3e;
    border-radius: 3px;
    margin: 4px auto 12px;
}
.phone-screen {
    background: #0e0e18;
    border-radius: 24px;
    overflow: hidden;
    min-height: 380px;
}

.chat-header {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 14px 16px;
    background: #161624;
    border-bottom: 1px solid var(--border);
}
.chat-avatar { font-size: 20px; }
.chat-name { font-size: 14px; font-weight: 600; }

.chat-messages {
    padding: 16px 12px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.chat-msg {
    max-width: 85%;
}
.chat-msg.bot { align-self: flex-start; }
.chat-msg.user { align-self: flex-end; }

.msg-voice {
    display: flex;
    align-items: center;
    gap: 8px;
    background: #1e1e30;
    border-radius: 16px;
    padding: 10px 14px;
}
.msg-voice.user-voice {
    background: rgba(124, 92, 255, 0.15);
}

.play-btn {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--accent);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 10px;
    flex-shrink: 0;
}

.waveform {
    display: flex;
    align-items: center;
    gap: 2px;
    flex: 1;
}
.waveform span {
    display: block;
    width: 3px;
    height: 8px;
    background: var(--text-muted);
    border-radius: 2px;
    animation: wave 1.2s ease-in-out infinite;
}

@keyframes wave {
    0%, 100% { height: 6px; }
    50% { height: 18px; }
}

.msg-duration {
    font-size: 11px;
    color: var(--text-dim);
    flex-shrink: 0;
}

.msg-text-small {
    font-size: 11px;
    color: var(--text-dim);
    padding: 4px 14px 0;
}

.msg-bubble {
    background: #1e1e30;
    border-radius: 16px;
    padding: 10px 14px;
    font-size: 13px;
    color: var(--accent-2);
}

/* ── Compare Table ────────────────────────────────────────────── */
.table-wrapper {
    overflow-x: auto;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
}

.compare-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

.compare-table th,
.compare-table td {
    padding: 14px 20px;
    text-align: center;
    border-bottom: 1px solid var(--border);
}

.compare-table th {
    background: var(--surface);
    font-weight: 700;
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
}

.compare-table td:first-child {
    text-align: left;
    font-weight: 600;
    color: var(--text);
}

.compare-table td {
    color: var(--text-muted);
}

.highlight-col {
    background: rgba(124, 92, 255, 0.05) !important;
    color: var(--text) !important;
}

.compare-table th.highlight-col {
    color: var(--accent-hover) !important;
    background: rgba(124, 92, 255, 0.1) !important;
}

.price-row td { font-weight: 700; }
.price-row .highlight-col { color: var(--accent-2) !important; }

.compare-table small {
    color: var(--accent-hover);
    font-size: 11px;
}

/* ── Pricing ──────────────────────────────────────────────────── */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    max-width: 800px;
    margin: 0 auto;
}

.price-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 40px 32px;
    position: relative;
}

.price-card-pro {
    background: linear-gradient(135deg, rgba(124, 92, 255, 0.08), rgba(0, 212, 170, 0.05));
    border-color: rgba(124, 92, 255, 0.2);
    box-shadow: 0 0 60px var(--accent-glow);
}

.price-popular {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--pro);
    color: white;
    padding: 4px 20px;
    border-radius: 100px;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.5px;
}

.price-name {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 8px;
}

.price-amount {
    font-size: 48px;
    font-weight: 900;
    letter-spacing: -2px;
    margin-bottom: 8px;
}
.price-amount span {
    font-size: 16px;
    font-weight: 500;
    color: var(--text-muted);
    letter-spacing: 0;
}

.price-desc {
    color: var(--text-muted);
    font-size: 14px;
    margin-bottom: 24px;
}

.price-features {
    list-style: none;
    margin-bottom: 32px;
}
.price-features li {
    padding: 8px 0;
    font-size: 14px;
    color: var(--text-muted);
    border-bottom: 1px solid var(--border);
}
.price-features li:last-child { border-bottom: none; }

.price-btn {
    display: block;
    text-align: center;
    padding: 14px;
    border-radius: var(--radius);
    font-weight: 700;
    font-size: 14px;
    border: 1px solid var(--border);
    color: var(--text);
    transition: all 0.3s;
}
.price-btn:hover {
    background: var(--surface);
    border-color: var(--border-hover);
    color: var(--text);
}

.price-btn-pro {
    background: var(--pro);
    border: none;
    color: white;
}
.price-btn-pro:hover {
    opacity: 0.9;
    transform: translateY(-1px);
    box-shadow: 0 8px 30px var(--accent-glow);
    color: white;
}

.price-note {
    text-align: center;
    font-size: 12px;
    color: var(--text-dim);
    margin-top: 12px;
}

/* ── CTA ──────────────────────────────────────────────────────── */
.cta-container {
    text-align: center;
    max-width: 600px;
    padding: 60px 24px;
}

.cta-title {
    font-size: clamp(32px, 5vw, 48px);
    font-weight: 900;
    margin-bottom: 12px;
    background: var(--pro);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.cta-sub {
    color: var(--text-muted);
    font-size: 16px;
    margin-bottom: 32px;
}

.cta-install {
    justify-content: center;
    margin: 0 auto 24px;
    max-width: 360px;
}

.cta-links {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    color: var(--text-dim);
    font-size: 14px;
}
.cta-links a { color: var(--text-muted); }
.cta-links a:hover { color: var(--text); }

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

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

.footer-left {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    font-size: 14px;
}
.footer-copy {
    color: var(--text-dim);
    font-weight: 400;
}

.footer-right {
    display: flex;
    gap: 24px;
}
.footer-right a {
    color: var(--text-dim);
    font-size: 13px;
}
.footer-right a:hover { color: var(--text-muted); }

/* ── Responsive ───────────────────────────────────────────────── */
@media (max-width: 900px) {
    .steps-grid { grid-template-columns: 1fr; max-width: 400px; margin: 0 auto; }
    .features-grid { grid-template-columns: repeat(2, 1fr); }
    .voice-grid { grid-template-columns: 1fr; gap: 48px; }
    .voice-info { text-align: center; }
    .voice-features { align-items: center; }
    .pricing-grid { grid-template-columns: 1fr; max-width: 400px; margin: 0 auto; }
    .nav-links a:not(.nav-github) { display: none; }
    .hero-stats { gap: 20px; }
    .compare-table { font-size: 12px; }
    .compare-table th, .compare-table td { padding: 10px 12px; }
}

@media (max-width: 600px) {
    .features-grid { grid-template-columns: 1fr; }
    .hero-stats { flex-wrap: wrap; gap: 16px; }
    .stat-divider { display: none; }
    .footer-inner { flex-direction: column; gap: 16px; }
}