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

:root {
    --bg: #0a0b10;
    --bg2: #0f1119;
    --surface: #141722;
    --surface2: #1a1e2e;
    --border: #1f2438;
    --text: #e8ecf4;
    --text2: #7d859c;
    --accent: #00d4aa;
    --accent2: #00b894;
    --accent-glow: rgba(0, 212, 170, 0.15);
}

html { scroll-behavior: smooth; }

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 1120px;
    margin: 0 auto;
    padding: 0 40px;
}

/* === Nav === */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(10, 11, 16, 0.85);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
}

.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 18px;
    font-weight: 700;
    color: var(--text);
    text-decoration: none;
}

.nav-links {
    display: flex;
    gap: 36px;
}

.nav-links a {
    color: var(--text2);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: color 0.2s;
}

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

.nav-right {
    display: flex;
    align-items: center;
    gap: 12px;
}

.lang-toggle {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    background: transparent;
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text2);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    font-family: inherit;
}

.lang-toggle:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.nav-cta {
    padding: 8px 20px;
    background: var(--accent);
    color: #0a0b10;
    border-radius: 8px;
    text-decoration: none;
    font-size: 14px;
    font-weight: 600;
    transition: background 0.2s;
}

.nav-cta:hover { background: var(--accent2); }

/* === Buttons === */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--accent);
    color: #0a0b10;
}

.btn-primary:hover {
    background: var(--accent2);
    transform: translateY(-1px);
}

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

.btn-outline:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.btn-lg {
    padding: 14px 32px;
    font-size: 16px;
    border-radius: 12px;
}

.btn-disabled {
    opacity: 0.4;
    pointer-events: none;
}

/* === Hero === */
.hero {
    padding: 140px 0 100px;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-badge {
    display: inline-block;
    padding: 6px 16px;
    background: var(--accent-glow);
    border: 1px solid rgba(0, 212, 170, 0.2);
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
    color: var(--accent);
    margin-bottom: 24px;
}

.hero h1 {
    font-size: 52px;
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -1.5px;
    margin-bottom: 20px;
}

.hero-sub {
    font-size: 17px;
    color: var(--text2);
    line-height: 1.7;
    margin-bottom: 36px;
    max-width: 480px;
}

.hero-actions {
    display: flex;
    gap: 14px;
    margin-bottom: 48px;
}

.hero-stats {
    display: flex;
    align-items: center;
    gap: 28px;
}

.hero-stat strong {
    display: block;
    font-size: 20px;
    font-weight: 700;
    color: var(--accent);
}

.hero-stat span {
    font-size: 13px;
    color: var(--text2);
}

.hero-stat-divider {
    width: 1px;
    height: 36px;
    background: var(--border);
}

/* === App Mockup === */
.app-mockup {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 40px 80px rgba(0, 0, 0, 0.4), 0 0 60px rgba(0, 212, 170, 0.06);
}

.mockup-bar {
    display: flex;
    align-items: center;
    gap: 7px;
    padding: 12px 16px;
    background: var(--bg2);
    border-bottom: 1px solid var(--border);
}

.mockup-bar .dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.dot.red { background: #ff5f57; }
.dot.yellow { background: #febc2e; }
.dot.green { background: #28c840; }

.mockup-title {
    margin-left: 8px;
    font-size: 12px;
    color: var(--text2);
    font-weight: 500;
}

.mockup-body {
    padding: 16px;
}

.mockup-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 12px;
}

.mockup-logo-row {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    font-weight: 700;
    color: var(--text);
}

.mockup-status {
    display: flex;
    align-items: center;
    gap: 8px;
}

.mockup-dot-green {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 6px rgba(0, 212, 170, 0.6);
}

.mockup-logout {
    font-size: 11px;
    color: var(--text2);
    padding: 3px 8px;
    border: 1px solid var(--border);
    border-radius: 4px;
}

.mockup-card {
    background: var(--bg2);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 14px;
    margin-bottom: 10px;
}

.mockup-card-glow {
    border-color: var(--accent);
    box-shadow: 0 0 20px rgba(0, 212, 170, 0.08);
}

.mockup-card-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
    font-size: 12px;
    font-weight: 600;
}

.mockup-badge {
    font-size: 9px;
    font-weight: 700;
    padding: 2px 8px;
    border-radius: 10px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.mockup-badge.green {
    background: rgba(0, 212, 170, 0.15);
    color: var(--accent);
}

.mockup-row {
    display: flex;
    justify-content: space-between;
    padding: 5px 0;
    font-size: 11px;
    color: var(--text2);
    border-bottom: 1px solid rgba(31, 36, 56, 0.5);
}

.mockup-row:last-child { border-bottom: none; }

.mockup-tag {
    font-size: 10px;
    font-weight: 600;
    padding: 1px 6px;
    border-radius: 3px;
}

.mockup-tag.green {
    background: rgba(0, 212, 170, 0.15);
    color: var(--accent);
}

.mockup-count {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--bg2);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 12px 14px;
    font-size: 12px;
    font-weight: 600;
}

.mockup-count-num {
    font-size: 18px;
    font-weight: 700;
    color: var(--accent);
    background: rgba(0, 212, 170, 0.12);
    padding: 2px 12px;
    border-radius: 6px;
    font-family: 'SF Mono', 'Fira Code', monospace;
}

/* === Section Headers === */
.section-header {
    text-align: center;
    max-width: 600px;
    margin: 0 auto 60px;
}

.section-badge {
    display: inline-block;
    padding: 5px 14px;
    background: var(--accent-glow);
    border: 1px solid rgba(0, 212, 170, 0.2);
    border-radius: 16px;
    font-size: 12px;
    font-weight: 600;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 20px;
}

.section-header h2 {
    font-size: 40px;
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -1px;
    margin-bottom: 16px;
}

.section-header p {
    font-size: 16px;
    color: var(--text2);
    line-height: 1.7;
}

/* === Features === */
.features {
    padding: 100px 0;
    background: var(--bg2);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.feature-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 36px;
    transition: border-color 0.3s, box-shadow 0.3s;
}

.feature-card:hover {
    border-color: rgba(0, 212, 170, 0.3);
    box-shadow: 0 0 30px rgba(0, 212, 170, 0.06);
}

.feature-icon {
    width: 52px;
    height: 52px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-glow);
    border-radius: 12px;
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 10px;
}

.feature-card p {
    font-size: 14px;
    color: var(--text2);
    line-height: 1.7;
}

/* === How It Works === */
.how-it-works {
    padding: 100px 0;
}

.steps {
    max-width: 640px;
    margin: 0 auto;
}

.step {
    display: flex;
    gap: 28px;
    align-items: flex-start;
}

.step-num {
    flex-shrink: 0;
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-glow);
    border: 1px solid rgba(0, 212, 170, 0.25);
    border-radius: 14px;
    font-size: 20px;
    font-weight: 800;
    color: var(--accent);
}

.step-content h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 8px;
}

.step-content p {
    font-size: 15px;
    color: var(--text2);
    line-height: 1.7;
}

.step-connector {
    width: 2px;
    height: 40px;
    background: var(--border);
    margin: 0 0 0 27px;
}

/* === Trust === */
.trust {
    padding: 80px 0;
    background: var(--bg2);
}

.trust-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.trust-card {
    text-align: center;
    padding: 36px 20px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 16px;
}

.trust-num {
    font-size: 36px;
    font-weight: 800;
    color: var(--accent);
    margin-bottom: 6px;
}

.trust-label {
    font-size: 14px;
    color: var(--text2);
}

/* === Download === */
.download {
    padding: 100px 0;
}

.download-box {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 24px;
    padding: 60px;
}

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

.download-cards.four-col {
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

/* Install commands */
.install-commands {
    max-width: 640px;
    margin: 0 auto;
}

.install-block {
    margin-bottom: 24px;
}

.install-label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 15px;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 10px;
}

.install-code {
    position: relative;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 16px 20px;
    cursor: pointer;
    transition: border-color 0.2s;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.install-code:hover {
    border-color: var(--accent);
}

.install-code code {
    font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
    font-size: 14px;
    color: var(--accent);
    white-space: nowrap;
    overflow-x: auto;
}

.copy-hint {
    font-size: 12px;
    color: var(--text2);
    white-space: nowrap;
    flex-shrink: 0;
}

.install-note {
    text-align: center;
    font-size: 14px;
    color: var(--text2);
    line-height: 1.8;
    margin-top: 28px;
}

/* Platform dropdown */
.platform-dropdown {
    margin-top: 32px;
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
}

.platform-toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    color: var(--text2);
    transition: color 0.2s, background 0.2s;
}

.platform-toggle:hover {
    color: var(--text);
    background: rgba(255, 255, 255, 0.02);
}

.platform-arrow {
    transition: transform 0.3s;
    flex-shrink: 0;
}

.platform-dropdown.open .platform-arrow {
    transform: rotate(180deg);
}

.platform-list {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease;
}

.platform-dropdown.open .platform-list {
    max-height: 800px;
}

.platform-item {
    padding: 16px 20px;
    border-top: 1px solid var(--border);
}

.platform-name {
    font-size: 13px;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 10px;
}

.platform-item .install-code code {
    font-size: 12px;
    word-break: break-all;
    white-space: normal;
}

.install-note code {
    font-family: 'SF Mono', 'Fira Code', monospace;
    font-size: 13px;
    color: var(--accent);
    background: rgba(0, 212, 170, 0.08);
    padding: 2px 8px;
    border-radius: 4px;
}

.dl-card {
    text-align: center;
    padding: 36px 24px;
    background: var(--bg2);
    border: 1px solid var(--border);
    border-radius: 16px;
    transition: border-color 0.3s;
}

.dl-card-active {
    border-color: var(--accent);
    box-shadow: 0 0 30px rgba(0, 212, 170, 0.08);
}

.dl-icon {
    margin-bottom: 16px;
}

.dl-card h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 4px;
}

.dl-card p {
    font-size: 13px;
    color: var(--text2);
    margin-bottom: 20px;
}

.dl-card .btn {
    width: 100%;
    justify-content: center;
    margin-bottom: 12px;
}

.dl-version {
    font-size: 12px;
    color: var(--text2);
}


/* === FAQ === */
.faq {
    padding: 100px 0;
    background: var(--bg2);
}

.faq-list {
    max-width: 700px;
    margin: 0 auto;
}

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

.faq-q {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 22px 0;
    font-size: 16px;
    font-weight: 600;
    color: var(--text);
}

.faq-arrow {
    flex-shrink: 0;
    color: var(--text2);
    transition: transform 0.3s;
}

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

.faq-a {
    max-height: 0;
    overflow: hidden;
    font-size: 14px;
    color: var(--text2);
    line-height: 1.8;
    transition: max-height 0.3s ease, padding 0.3s ease;
    padding: 0 0 0 0;
}

.faq-item.open .faq-a {
    max-height: 200px;
    padding: 0 0 22px 0;
}

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

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

.footer-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 15px;
    font-weight: 700;
    color: var(--text);
}

.footer-text {
    font-size: 13px;
    color: var(--text2);
}

/* === Selection === */
::selection {
    background: rgba(0, 212, 170, 0.25);
    color: var(--text);
}

/* === Scrollbar === */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: #2a2e45; }

/* === Mobile Hamburger (Landing Page) === */
.nav-hamburger {
    display: none;
    background: none;
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 6px 8px;
    cursor: pointer;
    color: var(--text);
    font-size: 20px;
    line-height: 1;
}

/* === Mobile Responsive === */
@media (max-width: 768px) {
    .container { padding: 0 20px; }

    /* Nav */
    .nav-hamburger { display: block; }
    .nav-inner { flex-wrap: wrap; }
    .nav-links, .nav-right {
        display: none;
        width: 100%;
        padding: 12px 0;
    }
    .nav-links {
        flex-direction: column;
        gap: 0;
    }
    .nav-links a {
        padding: 10px 0;
        font-size: 15px;
    }
    .nav-right {
        flex-direction: column;
        gap: 10px;
        padding-bottom: 16px;
    }
    .nav.nav-open .nav-links,
    .nav.nav-open .nav-right { display: flex; }

    /* Hero */
    .hero { padding: 100px 0 60px; }
    .hero .container { grid-template-columns: 1fr; gap: 32px; }
    .hero h1 { font-size: 32px; min-height: auto !important; }
    .hero-sub { font-size: 15px; }
    .hero-actions { flex-wrap: wrap; }
    .hero-stats { flex-wrap: wrap; gap: 16px; }
    .hero-stat-divider { display: none; }

    /* Section Headers */
    .section-header h2 { font-size: 28px; }
    .section-header p { font-size: 14px; }
    .section-header { margin-bottom: 36px; }

    /* Features */
    .features { padding: 60px 0; }
    .features-grid { grid-template-columns: 1fr; }
    .feature-card { padding: 24px; }

    /* How It Works */
    .how-it-works { padding: 60px 0; }

    /* Trust */
    .trust { padding: 48px 0; }
    .trust-grid { grid-template-columns: repeat(2, 1fr); }
    .trust-card { padding: 24px 16px; }
    .trust-num { font-size: 28px; }

    /* Download */
    .download { padding: 60px 0; }
    .download-box { padding: 32px 20px; }
    .download-cards { grid-template-columns: 1fr; }
    .download-cards.four-col { grid-template-columns: 1fr; }
    .install-code code { font-size: 12px; }

    /* FAQ */
    .faq { padding: 60px 0; }
    .faq-q { font-size: 14px; }

    /* Footer */
    .footer-inner { flex-direction: column; gap: 8px; text-align: center; }

    /* Buttons */
    .btn-lg { padding: 12px 24px; font-size: 14px; }
}