/* ===================================================
   IPTVault Product Website
   Dark theme, modern enterprise SaaS styling
   =================================================== */

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

:root {
    --bg-primary: #080b14;
    --bg-secondary: #0d1121;
    --bg-card: #111827;
    --bg-card-hover: #161d2f;
    --bg-input: #0f1524;
    --border: #1e293b;
    --border-light: #2a3548;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --accent-blue: #3b82f6;
    --accent-blue-dim: rgba(59, 130, 246, 0.15);
    --accent-purple: #8b5cf6;
    --accent-green: #10b981;
    --accent-orange: #f59e0b;
    --accent-red: #ef4444;
    --accent-cyan: #06b6d4;
    --gradient-main: linear-gradient(135deg, #3b82f6, #8b5cf6);
    --gradient-text: linear-gradient(135deg, #60a5fa, #a78bfa);
    --shadow-lg: 0 25px 50px rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 0 60px rgba(59, 130, 246, 0.08);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --transition: 0.3s ease;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

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

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

a {
    text-decoration: none;
    color: inherit;
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all var(--transition);
    border: none;
    font-family: inherit;
    white-space: nowrap;
}

.btn-primary {
    background: var(--gradient-main);
    color: #fff;
    box-shadow: 0 4px 20px rgba(59, 130, 246, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(59, 130, 246, 0.4);
}

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

.btn-outline:hover {
    border-color: var(--accent-blue);
    background: var(--accent-blue-dim);
    color: #fff;
}

.btn-lg {
    padding: 16px 32px;
    font-size: 1.05rem;
}

.btn-block {
    width: 100%;
    justify-content: center;
}

.btn-nav {
    padding: 8px 20px;
    background: var(--gradient-main);
    color: #fff;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
}

/* --- Navigation --- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 16px 0;
    transition: all var(--transition);
    background: transparent;
}

.navbar.scrolled {
    background: rgba(8, 11, 20, 0.92);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    padding: 10px 0;
}

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

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 1.25rem;
}

.nav-logo img {
    width: 36px;
    height: 36px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
    list-style: none;
}

.nav-links a {
    font-size: 0.9rem;
    color: var(--text-secondary);
    transition: color var(--transition);
    font-weight: 500;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--text-primary);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: all var(--transition);
    border-radius: 2px;
}

/* --- Hero --- */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 140px 0 80px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.hero-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(59, 130, 246, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(59, 130, 246, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
}

.hero-glow {
    position: absolute;
    top: -30%;
    left: 50%;
    transform: translateX(-50%);
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.12) 0%, transparent 60%);
    filter: blur(80px);
}

.hero-content {
    position: relative;
    text-align: center;
    z-index: 2;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    background: var(--accent-blue-dim);
    border: 1px solid rgba(59, 130, 246, 0.2);
    border-radius: 100px;
    font-size: 0.85rem;
    color: var(--accent-blue);
    font-weight: 500;
    margin-bottom: 24px;
}

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

@keyframes pulse-dot {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

.hero h1 {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 24px;
    letter-spacing: -0.03em;
}

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

.hero-subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
    max-width: 680px;
    margin: 0 auto 40px;
    line-height: 1.7;
}

.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 60px;
}

.hero-stats {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 40px;
    flex-wrap: wrap;
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: var(--border);
}

/* --- Browser Mockup --- */
.hero-visual {
    position: relative;
    z-index: 2;
    width: 100%;
    max-width: 900px;
    margin: 60px auto 0;
    padding: 0 24px;
}

.browser-mockup {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

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

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

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

.browser-dots span:first-child { background: #ef4444; }
.browser-dots span:nth-child(2) { background: #f59e0b; }
.browser-dots span:last-child { background: #10b981; }

.browser-url {
    flex: 1;
    background: var(--bg-primary);
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 0.8rem;
    color: var(--text-muted);
    font-family: 'SF Mono', 'Fira Code', monospace;
}

.browser-content {
    display: flex;
    min-height: 300px;
}

.mockup-sidebar {
    width: 60px;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border);
    padding: 16px 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.mockup-nav-item {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    background: var(--border);
    opacity: 0.4;
}

.mockup-nav-item.active {
    background: var(--accent-blue);
    opacity: 1;
}

.mockup-main {
    flex: 1;
    padding: 20px;
}

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

.mockup-title {
    width: 200px;
    height: 20px;
    background: var(--border-light);
    border-radius: 4px;
}

.mockup-actions {
    display: flex;
    gap: 8px;
}

.mockup-btn {
    width: 80px;
    height: 28px;
    border-radius: 6px;
    background: var(--border);
}

.mockup-btn.primary {
    background: var(--accent-blue);
}

.mockup-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
}

.mockup-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
}

.mockup-thumb {
    height: 80px;
    background: linear-gradient(135deg, #1a2332, #0f1a28);
}

.mockup-thumb.pulse {
    animation: thumbPulse 3s ease-in-out infinite;
}

.mockup-thumb.delay-1 { animation-delay: 0.5s; }
.mockup-thumb.delay-2 { animation-delay: 1s; }
.mockup-thumb.delay-3 { animation-delay: 1.5s; }

@keyframes thumbPulse {
    0%, 100% { background: linear-gradient(135deg, #1a2332, #0f1a28); }
    50% { background: linear-gradient(135deg, #1e3a5f, #162d4a); }
}

.mockup-card.encoder .mockup-thumb {
    border-top: 2px solid var(--accent-green);
}

.mockup-card.decoder .mockup-thumb {
    border-top: 2px solid var(--accent-blue);
}

.mockup-card-text {
    padding: 8px;
}

.mockup-card-text::before {
    content: '';
    display: block;
    width: 60%;
    height: 8px;
    background: var(--border);
    border-radius: 4px;
}

/* --- Trusted By --- */
.trusted {
    padding: 40px 0;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    background: var(--bg-secondary);
}

.trusted-label {
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 16px;
}

.trusted-items {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}

.trusted-item {
    font-size: 0.95rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.trusted-sep {
    color: var(--text-muted);
    font-size: 0.6rem;
}

/* --- Problem / Solution --- */
.problem-solution {
    padding: 100px 0;
}

.ps-grid {
    display: flex;
    align-items: stretch;
    gap: 32px;
    justify-content: center;
}

.ps-arrow {
    display: flex;
    align-items: center;
    color: var(--accent-blue);
    flex-shrink: 0;
}

.ps-card {
    flex: 1;
    max-width: 460px;
    padding: 40px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
}

.ps-card.problem {
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.05), var(--bg-card));
    border-color: rgba(239, 68, 68, 0.15);
}

.ps-card.solution {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.05), var(--bg-card));
    border-color: rgba(16, 185, 129, 0.15);
}

.ps-icon {
    margin-bottom: 20px;
}

.ps-card.problem .ps-icon { color: var(--accent-red); }
.ps-card.solution .ps-icon { color: var(--accent-green); }

.ps-card h3 {
    font-size: 1.3rem;
    margin-bottom: 20px;
}

.ps-card ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.ps-card ul li {
    padding-left: 24px;
    position: relative;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.ps-card.problem ul li::before {
    content: '\2717';
    position: absolute;
    left: 0;
    color: var(--accent-red);
    font-weight: 700;
}

.ps-card.solution ul li::before {
    content: '\2713';
    position: absolute;
    left: 0;
    color: var(--accent-green);
    font-weight: 700;
}

/* --- Section Headers --- */
.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-tag {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--accent-blue);
    margin-bottom: 12px;
}

.section-header h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.section-header p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* --- Features --- */
.features {
    padding: 100px 0;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 32px;
    transition: all var(--transition);
}

.feature-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-light);
    transform: translateY(-4px);
}

.feature-card.featured {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: auto 1fr;
    grid-template-rows: auto 1fr auto;
    gap: 0 24px;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.06), var(--bg-card));
    border-color: rgba(59, 130, 246, 0.15);
}

.feature-card.featured .feature-icon {
    grid-row: 1 / 3;
}

.feature-card.featured .feature-tags {
    grid-column: 1 / -1;
}

.feature-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.feature-icon.blue { background: rgba(59, 130, 246, 0.12); color: var(--accent-blue); }
.feature-icon.purple { background: rgba(139, 92, 246, 0.12); color: var(--accent-purple); }
.feature-icon.green { background: rgba(16, 185, 129, 0.12); color: var(--accent-green); }
.feature-icon.orange { background: rgba(245, 158, 11, 0.12); color: var(--accent-orange); }
.feature-icon.red { background: rgba(239, 68, 68, 0.12); color: var(--accent-red); }
.feature-icon.cyan { background: rgba(6, 182, 212, 0.12); color: var(--accent-cyan); }

.feature-card h3 {
    font-size: 1.15rem;
    margin-bottom: 10px;
    font-weight: 700;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

.feature-tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-top: 16px;
}

.feature-tags span {
    padding: 4px 12px;
    background: var(--accent-blue-dim);
    color: var(--accent-blue);
    font-size: 0.8rem;
    font-weight: 500;
    border-radius: 100px;
}

/* --- Architecture --- */
.architecture {
    padding: 100px 0;
    background: var(--bg-secondary);
}

.arch-diagram {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0;
    margin-bottom: 48px;
    flex-wrap: wrap;
}

.arch-node {
    text-align: center;
    padding: 32px 24px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    min-width: 200px;
}

.arch-node.server {
    border-color: rgba(59, 130, 246, 0.3);
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.08), var(--bg-card));
}

.arch-icon {
    margin-bottom: 12px;
    color: var(--text-secondary);
}

.arch-node.server .arch-icon {
    color: var(--accent-blue);
}

.arch-node h4 {
    font-size: 1rem;
    margin-bottom: 4px;
}

.arch-node p {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.arch-connector {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: 0 8px;
}

.arch-line {
    width: 60px;
    height: 2px;
    background: linear-gradient(90deg, var(--border-light), var(--accent-blue), var(--border-light));
    position: relative;
}

.arch-line::after {
    content: '';
    position: absolute;
    right: -4px;
    top: -3px;
    width: 0;
    height: 0;
    border-left: 6px solid var(--accent-blue);
    border-top: 4px solid transparent;
    border-bottom: 4px solid transparent;
}

.arch-port {
    font-size: 0.75rem;
    color: var(--accent-blue);
    font-weight: 500;
    font-family: 'SF Mono', 'Fira Code', monospace;
}

.arch-features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    max-width: 700px;
    margin: 0 auto;
}

.arch-feat {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.arch-feat svg {
    color: var(--accent-green);
    flex-shrink: 0;
}

/* --- Devices --- */
.devices-section {
    padding: 100px 0;
}

.devices-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.device-category {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 36px;
    text-align: center;
}

.device-cat-icon {
    width: 64px;
    height: 64px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
}

.encoder-icon { background: rgba(16, 185, 129, 0.12); color: var(--accent-green); }
.decoder-icon { background: rgba(59, 130, 246, 0.12); color: var(--accent-blue); }
.mv-icon { background: rgba(139, 92, 246, 0.12); color: var(--accent-purple); }

.device-category h3 {
    font-size: 1.3rem;
    margin-bottom: 8px;
}

.device-category > p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 20px;
}

.device-models {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
}

.device-models span {
    padding: 4px 12px;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 100px;
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.device-note {
    margin-top: 16px;
    font-size: 0.85rem;
    color: var(--text-muted);
    font-style: italic;
}

/* --- Pricing --- */
.pricing {
    padding: 100px 0;
    background: var(--bg-secondary);
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    align-items: start;
}

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

.price-card:hover {
    transform: translateY(-4px);
    border-color: var(--border-light);
}

.price-card.popular {
    border-color: var(--accent-blue);
    background: linear-gradient(180deg, rgba(59, 130, 246, 0.06), var(--bg-card));
    box-shadow: 0 0 60px rgba(59, 130, 246, 0.1);
    transform: scale(1.03);
}

.price-card.popular:hover {
    transform: scale(1.03) translateY(-4px);
}

.popular-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--gradient-main);
    color: #fff;
    padding: 4px 20px;
    border-radius: 100px;
    font-size: 0.8rem;
    font-weight: 600;
    white-space: nowrap;
}

.price-tier {
    font-size: 1.25rem;
    font-weight: 700;
}

.price-target {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 24px;
}

.price-amount {
    display: flex;
    align-items: baseline;
    gap: 2px;
    margin-bottom: 4px;
}

.price-currency {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.price-value {
    font-size: 3.5rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1;
}

.price-period {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 16px;
}

.price-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 28px;
    line-height: 1.5;
}

.price-features {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 14px;
    margin-bottom: 32px;
}

.price-features li {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.price-features li svg {
    color: var(--accent-green);
    flex-shrink: 0;
}

.pricing-note {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-top: 40px;
}

/* --- Tech Specs --- */
.tech-specs {
    padding: 100px 0;
}

.specs-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}

.spec-item {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 24px;
}

.spec-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 6px;
}

.spec-value {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* --- FAQ --- */
.faq {
    padding: 100px 0;
    background: var(--bg-secondary);
}

.faq-list {
    max-width: 760px;
    margin: 0 auto;
}

.faq-item {
    border-bottom: 1px solid var(--border);
}

.faq-question {
    width: 100%;
    background: none;
    border: none;
    padding: 24px 0;
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-primary);
    text-align: left;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    font-family: inherit;
    transition: color var(--transition);
}

.faq-question:hover {
    color: var(--accent-blue);
}

.faq-question svg {
    flex-shrink: 0;
    transition: transform var(--transition);
    color: var(--text-muted);
}

.faq-item.open .faq-question svg {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.4s ease;
}

.faq-item.open .faq-answer {
    max-height: 300px;
    padding-bottom: 24px;
}

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

/* --- Contact --- */
.contact {
    padding: 100px 0;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: start;
}

.contact-info h2 {
    font-size: 2.5rem;
    font-weight: 800;
    line-height: 1.15;
    margin: 12px 0 16px;
    letter-spacing: -0.02em;
}

.contact-info p {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.7;
    margin-bottom: 32px;
}

.contact-methods {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.contact-method {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.contact-method svg {
    color: var(--accent-blue);
}

.contact-form-wrap {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: 40px;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-group label {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.form-group input,
.form-group select,
.form-group textarea {
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 12px 16px;
    font-size: 0.95rem;
    color: var(--text-primary);
    font-family: inherit;
    transition: border-color var(--transition);
    outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--accent-blue);
}

.form-group select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 40px;
}

.form-group textarea {
    resize: vertical;
    min-height: 80px;
}

/* --- Footer --- */
.footer {
    padding: 64px 0 32px;
    border-top: 1px solid var(--border);
    background: var(--bg-secondary);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 48px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 1.15rem;
    margin-bottom: 12px;
}

.footer-logo img {
    width: 32px;
    height: 32px;
}

.footer-brand p {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 8px;
}

.footer-company a {
    color: var(--accent-blue);
}

.footer-links h4 {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-muted);
    margin-bottom: 16px;
}

.footer-links ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-links a {
    font-size: 0.9rem;
    color: var(--text-secondary);
    transition: color var(--transition);
}

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

.footer-bottom {
    border-top: 1px solid var(--border);
    padding-top: 24px;
    text-align: center;
}

.footer-bottom p {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* --- Responsive --- */
@media (max-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .feature-card.featured {
        grid-column: 1 / -1;
    }
    .pricing-grid {
        grid-template-columns: 1fr;
        max-width: 480px;
        margin-left: auto;
        margin-right: auto;
    }
    .price-card.popular {
        transform: none;
    }
    .price-card.popular:hover {
        transform: translateY(-4px);
    }
    .specs-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: var(--bg-secondary);
        flex-direction: column;
        padding: 80px 32px 32px;
        gap: 24px;
        border-left: 1px solid var(--border);
        transition: right var(--transition);
        z-index: 999;
    }
    .nav-links.open {
        right: 0;
    }
    .nav-toggle {
        display: flex;
        z-index: 1001;
    }
    .hero {
        padding: 120px 0 60px;
    }
    .hero h1 {
        font-size: 2.2rem;
    }
    .hero-subtitle {
        font-size: 1rem;
    }
    .hero-stats {
        gap: 24px;
    }
    .stat-divider {
        display: none;
    }
    .ps-grid {
        flex-direction: column;
        align-items: center;
    }
    .ps-arrow {
        transform: rotate(90deg);
    }
    .ps-card {
        max-width: 100%;
    }
    .features-grid {
        grid-template-columns: 1fr;
    }
    .feature-card.featured {
        display: block;
    }
    .arch-diagram {
        flex-direction: column;
    }
    .arch-connector {
        transform: rotate(90deg);
        padding: 16px 0;
    }
    .arch-features {
        grid-template-columns: 1fr;
    }
    .devices-grid {
        grid-template-columns: 1fr;
    }
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    .contact-info h2 {
        font-size: 2rem;
    }
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    .form-row {
        grid-template-columns: 1fr;
    }
    .mockup-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .specs-grid {
        grid-template-columns: 1fr;
    }
}

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

.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}