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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Inter', 'Segoe UI', Arial, sans-serif;
    background: #0b0d14;
    color: #c8ced6;
    overflow-x: hidden;
    line-height: 1.6;
}

::selection { background: rgba(46, 168, 255, 0.25); }

#bg {
    position: fixed;
    top: 0; left: 0;
    width: 100vw; height: 100vh;
    z-index: 0;
    pointer-events: none;
}

nav {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 100;
    background: rgba(11, 13, 20, 0.85);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.nav-inner {
    max-width: 1100px;
    margin: 0 auto;
    padding: 16px 28px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    font-size: 17px;
    letter-spacing: 3px;
    color: #e8ecf0;
    text-decoration: none;
}

.nav-links {
    display: flex;
    gap: 28px;
    align-items: center;
}

.nav-links a {
    color: #6b7380;
    text-decoration: none;
    font-size: 13px;
    transition: color 0.2s;
}

.nav-links a:hover { color: #e8ecf0; }

.nav-lang {
    color: #4b5360;
    font-size: 13px;
    cursor: default;
    border: 1px solid rgba(255,255,255,0.06);
    padding: 4px 10px;
    border-radius: 4px;
}

.nav-login {
    background: rgba(46, 168, 255, 0.08);
    border: 1px solid rgba(46, 168, 255, 0.2);
    padding: 7px 18px;
    border-radius: 6px;
    color: #2EA8FF !important;
    font-weight: 600;
    font-size: 13px;
    transition: background 0.2s;
}

.nav-login:hover {
    background: rgba(46, 168, 255, 0.15);
}

.accent { color: #2EA8FF; }

.hero {
    position: relative;
    z-index: 1;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 24px;
}

.hero-bg-shape {
    position: absolute;
    top: 50%; left: 50%;
    width: 700px; height: 700px;
    transform: translate(-50%, -60%);
    background: radial-gradient(circle, rgba(46, 168, 255, 0.06) 0%, transparent 70%);
    pointer-events: none;
}

.hero-content {
    position: relative;
    max-width: 750px;
}

.hero h1 {
    font-size: clamp(44px, 8vw, 76px);
    font-weight: 900;
    line-height: 1.08;
    color: #f0f4f8;
    letter-spacing: -2px;
    margin-bottom: 16px;
}

.hero-sub {
    color: #5b6370;
    font-size: 17px;
    margin-bottom: 36px;
    letter-spacing: 0.3px;
}

.btn-group {
    display: flex;
    gap: 14px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 36px;
}

.btn {
    display: inline-block;
    padding: 15px 38px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 700;
    font-size: 14px;
    transition: all 0.25s ease;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: #2EA8FF;
    color: #fff;
    box-shadow: 0 4px 24px rgba(46, 168, 255, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 32px rgba(46, 168, 255, 0.45);
}

.btn-secondary {
    background: rgba(255,255,255,0.04);
    color: #c8ced6;
    border: 1px solid rgba(255,255,255,0.08);
}

.btn-secondary:hover {
    background: rgba(255,255,255,0.08);
    transform: translateY(-2px);
}

.hero-stats {
    color: #4b5360;
    font-size: 14px;
    display: flex;
    gap: 10px;
    justify-content: center;
    flex-wrap: wrap;
}

.dot { color: #2a3340; }

.stats-bar {
    position: relative;
    z-index: 1;
    max-width: 900px;
    margin: -40px auto 0;
    padding: 0 24px;
}

.stats-inner {
    background: rgba(18, 22, 34, 0.9);
    backdrop-filter: blur(12px);
    border: 1px solid rgba(255,255,255,0.04);
    border-radius: 14px;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1px;
    padding: 28px 8px;
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    text-align: center;
    font-size: 13px;
    color: #6b7380;
}

.stat-item strong {
    display: block;
    color: #e8ecf0;
    font-size: 16px;
    margin-bottom: 2px;
}

.stat-item svg { margin-bottom: 4px; }

.section {
    position: relative;
    z-index: 1;
    max-width: 1000px;
    margin: 0 auto;
    padding: 120px 28px 60px;
}

.section h2 {
    font-size: 32px;
    font-weight: 800;
    color: #f0f4f8;
    text-align: center;
    margin-bottom: 16px;
    letter-spacing: -0.5px;
}

.section-desc {
    text-align: center;
    color: #4b5360;
    font-size: 14px;
    margin-bottom: 44px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    margin-top: 32px;
}

.feature-card {
    background: rgba(255,255,255,0.02);
    border: 1px solid rgba(255,255,255,0.04);
    border-radius: 12px;
    padding: 32px 28px;
    transition: border-color 0.3s, background 0.3s;
}

.feature-card:hover {
    border-color: rgba(46, 168, 255, 0.12);
    background: rgba(46, 168, 255, 0.02);
}

.fc-icon {
    width: 36px;
    height: 36px;
    margin-bottom: 16px;
}

.fc-icon svg { width: 100%; height: 100%; }

.feature-card h3 {
    font-size: 17px;
    font-weight: 700;
    color: #e8ecf0;
    margin-bottom: 8px;
}

.feature-card p {
    font-size: 14px;
    color: #6b7380;
    line-height: 1.6;
}

.module-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 8px;
}

.module-category {
    background: rgba(255,255,255,0.02);
    border: 1px solid rgba(255,255,255,0.04);
    border-radius: 8px;
    overflow: hidden;
    transition: border-color 0.2s;
}

.module-category.open { border-color: rgba(46, 168, 255, 0.15); }
.module-category.open .cat-header { color: #2EA8FF; }

.cat-header {
    padding: 14px 18px;
    font-size: 13px;
    font-weight: 600;
    color: #6b7380;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    letter-spacing: 1px;
    user-select: none;
    transition: color 0.2s;
}

.cat-header:hover { color: #c8ced6; }

.cat-header .arrow {
    font-size: 10px;
    transition: transform 0.25s ease;
    color: #3a4350;
}

.module-category.open .arrow { transform: rotate(180deg); }

.cat-body {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease;
}

.module-category.open .cat-body { max-height: 800px; }

.module-list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2px;
    padding: 0 18px 14px;
}

.module-item {
    padding: 6px 8px;
    font-size: 13px;
    color: #4b5360;
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: 'SF Mono', 'Cascadia Code', 'Consolas', monospace;
}

.module-item::before {
    content: "";
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: #2EA8FF;
    opacity: 0.35;
    flex-shrink: 0;
}

.setup-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-top: 32px;
}

.setup-card {
    background: rgba(255,255,255,0.02);
    border: 1px solid rgba(255,255,255,0.04);
    border-radius: 12px;
    padding: 36px 32px;
    text-align: center;
}

.setup-card-accent {
    background: rgba(46, 168, 255, 0.04);
    border-color: rgba(46, 168, 255, 0.12);
}

.setup-label {
    color: #4b5360;
    font-size: 11px;
    letter-spacing: 3px;
    text-transform: uppercase;
    margin-bottom: 24px;
}

.setup-steps {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.setup-step-item {
    display: flex;
    gap: 16px;
    align-items: flex-start;
    text-align: left;
}

.step-num {
    flex-shrink: 0;
    width: 32px;
    height: 32px;
    border-radius: 8px;
    background: rgba(46, 168, 255, 0.1);
    border: 1px solid rgba(46, 168, 255, 0.15);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    font-weight: 700;
    color: #2EA8FF;
}

.setup-step-item strong {
    display: block;
    color: #e8ecf0;
    font-size: 14px;
    margin-bottom: 4px;
}

.setup-step-item p {
    color: #5b6370;
    font-size: 13px;
    line-height: 1.5;
    margin: 0;
}

.setup-step-item code {
    background: rgba(255,255,255,0.04);
    padding: 1px 6px;
    border-radius: 3px;
    font-size: 12px;
    color: #7b8390;
}

.setup-users {
    font-size: 22px;
    margin-bottom: 8px;
    color: #c8ced6;
}

.setup-users strong { color: #f0f4f8; }

.setup-card p {
    color: #5b6370;
    font-size: 14px;
    margin-bottom: 20px;
    line-height: 1.5;
}

.video-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-top: 32px;
}

.video-card {
    background: rgba(255,255,255,0.02);
    border: 1px solid rgba(255,255,255,0.04);
    border-radius: 12px;
    overflow: hidden;
    aspect-ratio: 16 / 10;
}

.video-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    color: #3a4350;
    font-size: 13px;
}

footer {
    position: relative;
    z-index: 1;
    border-top: 1px solid rgba(255,255,255,0.03);
    margin-top: 60px;
}

.footer-inner {
    max-width: 1000px;
    margin: 0 auto;
    padding: 40px 28px 32px;
    text-align: center;
}

.footer-brand {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-size: 14px;
    font-weight: 800;
    letter-spacing: 3px;
    color: #4b5360;
    margin-bottom: 8px;
}

.footer-inner p {
    color: #2a3340;
    font-size: 12px;
}

.reviews-section {
    overflow: hidden;
    padding-bottom: 80px;
}
.reviews-track {
    display: flex;
    gap: 20px;
    animation: scrollReviews 30s linear infinite;
    width: max-content;
    padding: 10px 0;
}
.reviews-track:hover {
    animation-play-state: paused;
}
@keyframes scrollReviews {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}
.review-card {
    background: #12161e;
    border: 1px solid rgba(255,255,255,0.06);
    border-radius: 14px;
    padding: 22px 24px;
    min-width: 280px;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    gap: 8px;
    transition: border-color 0.2s;
}
.review-card:hover {
    border-color: #2EA8FF;
}
.review-stars {
    color: #f5b342;
    font-size: 15px;
    letter-spacing: 2px;
}
.review-card p {
    color: #9aa3b0;
    font-size: 14px;
    line-height: 1.5;
    margin: 0;
}
.review-author {
    color: #4b5360;
    font-size: 12px;
}

@media (max-width: 768px) {
    .stats-inner { grid-template-columns: repeat(2, 1fr); gap: 20px; }
    .features-grid { grid-template-columns: 1fr; }
    .setup-grid { grid-template-columns: 1fr; }
    .video-grid { grid-template-columns: 1fr; }
    .nav-links { gap: 16px; }
    .nav-links a { font-size: 12px; }
    .module-grid { grid-template-columns: 1fr; }
    .module-list { grid-template-columns: 1fr; }
    .hero-stats { font-size: 13px; }
}