@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800;900&display=swap');

:root {
    --bg-primary: #0a0a0f;
    --bg-secondary: #111118;
    --bg-card: #16161f;
    --text-primary: #f0f0f5;
    --text-secondary: #8888a0;
    --text-muted: #555570;
    --accent: #7c3aed;
    --accent-glow: rgba(124, 58, 237, 0.4);
    --accent-light: #a78bfa;
    --gradient-1: linear-gradient(135deg, #7c3aed, #3b82f6);
    --gradient-2: linear-gradient(135deg, #7c3aed, #ec4899);
    --border: #1e1e2e;
    --radius: 12px;
    --radius-lg: 20px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

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

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

/* NAVBAR */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(10, 10, 15, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
}

.nav-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 18px;
    letter-spacing: -0.5px;
}

.nav-logo img {
    width: 32px;
    height: 32px;
    border-radius: 8px;
}

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

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

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

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

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: 0.3s;
}

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

.hero-bg {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 80% 60% at 50% 40%, rgba(124, 58, 237, 0.15) 0%, transparent 60%),
        radial-gradient(ellipse 60% 50% at 70% 60%, rgba(59, 130, 246, 0.1) 0%, transparent 50%),
        radial-gradient(ellipse 50% 40% at 30% 50%, rgba(236, 72, 153, 0.08) 0%, transparent 40%);
    pointer-events: none;
}

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

.hero-logo {
    margin-bottom: 32px;
}

.hero-logo img {
    width: 120px;
    height: 120px;
    border-radius: 24px;
    box-shadow: 0 0 60px var(--accent-glow);
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.hero h1 {
    font-size: clamp(40px, 7vw, 72px);
    font-weight: 900;
    line-height: 1.05;
    letter-spacing: -2px;
    margin-bottom: 20px;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-sub {
    font-size: 18px;
    color: var(--text-secondary);
    max-width: 560px;
    margin: 0 auto 40px;
    line-height: 1.7;
}

.btn-download {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 40px;
    background: var(--gradient-1);
    color: #fff;
    font-size: 16px;
    font-weight: 700;
    border-radius: 50px;
    transition: all 0.3s;
    border: none;
    cursor: pointer;
}

.btn-download:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 40px var(--accent-glow);
}

.hero-version {
    margin-top: 16px;
    font-size: 13px;
    color: var(--text-muted);
}

/* FEATURES */
.features {
    padding: 100px 24px;
    max-width: 1200px;
    margin: 0 auto;
}

.features-header {
    text-align: center;
    margin-bottom: 64px;
}

.features-header h2 {
    font-size: 36px;
    font-weight: 800;
    letter-spacing: -1px;
    margin-bottom: 12px;
}

.features-header p {
    color: var(--text-secondary);
    font-size: 16px;
}

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

@media (max-width: 900px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 600px) {
    .features-grid {
        grid-template-columns: 1fr;
    }
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px;
    transition: all 0.3s;
}

.feature-card:hover {
    border-color: var(--accent);
    transform: translateY(-4px);
    box-shadow: 0 8px 30px rgba(124, 58, 237, 0.1);
}

.feature-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(124, 58, 237, 0.1);
    border-radius: 12px;
    margin-bottom: 20px;
    color: var(--accent-light);
}

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

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

/* STATS */
.stats {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.stats-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 80px 24px;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
    text-align: center;
}

@media (max-width: 700px) {
    .stats-inner {
        grid-template-columns: repeat(2, 1fr);
        gap: 40px;
    }
}

.stat-number {
    display: block;
    font-size: 48px;
    font-weight: 900;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -2px;
    line-height: 1;
    margin-bottom: 8px;
}

.stat-label {
    font-size: 14px;
    color: var(--text-secondary);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* FAQ */
.faq {
    padding: 100px 24px;
    max-width: 720px;
    margin: 0 auto;
}

.faq h2 {
    font-size: 36px;
    font-weight: 800;
    letter-spacing: -1px;
    text-align: center;
    margin-bottom: 48px;
}

.faq-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.faq-item {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
}

.faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    text-align: left;
    font-family: inherit;
    transition: color 0.2s;
}

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

.faq-question svg {
    flex-shrink: 0;
    transition: transform 0.3s;
}

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

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
    padding: 0 24px;
}

.faq-item.open .faq-answer {
    max-height: 300px;
    padding: 0 24px 20px;
}

.faq-answer p {
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.8;
}

/* FOOTER */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    padding: 64px 24px 0;
}

.footer-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    gap: 48px;
    flex-wrap: wrap;
    padding-bottom: 48px;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 700;
    font-size: 18px;
}

.footer-brand img {
    width: 28px;
    height: 28px;
    border-radius: 6px;
}

.footer-links {
    display: flex;
    gap: 64px;
}

.footer-col h4 {
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-muted);
    margin-bottom: 16px;
}

.footer-col a {
    display: block;
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 10px;
    transition: color 0.2s;
}

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

.footer-bottom {
    border-top: 1px solid var(--border);
    padding: 20px 24px;
    text-align: center;
}

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

/* DOWNLOAD PAGE */
.download-page {
    min-height: 100vh;
    padding: 120px 24px 80px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.download-page h1 {
    font-size: 48px;
    font-weight: 900;
    letter-spacing: -2px;
    margin-bottom: 40px;
    text-align: center;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.download-cards {
    display: flex;
    gap: 24px;
    flex-wrap: wrap;
    justify-content: center;
    margin-bottom: 48px;
    max-width: 800px;
}

.download-card {
    flex: 1;
    min-width: 280px;
    max-width: 400px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 40px 32px;
    text-align: center;
    transition: all 0.3s;
}

.download-card:hover {
    border-color: var(--accent);
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(124, 58, 237, 0.15);
}

.download-card.recommended {
    border-color: var(--accent);
    position: relative;
}

.download-card.recommended::before {
    content: 'Recommended';
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--gradient-1);
    color: #fff;
    font-size: 12px;
    font-weight: 700;
    padding: 4px 16px;
    border-radius: 50px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.download-card-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(124, 58, 237, 0.1);
    border-radius: 16px;
    color: var(--accent-light);
}

.download-card h3 {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 8px;
}

.download-card p {
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 24px;
}

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

.download-notice {
    max-width: 560px;
    text-align: center;
}

.download-notice p {
    font-size: 13px;
    color: var(--text-muted);
    line-height: 1.8;
}

.download-notice strong {
    color: var(--text-secondary);
}

/* MOBILE NAV */
@media (max-width: 700px) {
    .nav-links {
        position: fixed;
        top: 64px;
        left: 0;
        right: 0;
        background: rgba(10, 10, 15, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 24px;
        gap: 16px;
        transform: translateY(-100%);
        opacity: 0;
        pointer-events: none;
        transition: 0.3s;
        border-bottom: 1px solid var(--border);
    }

    .nav-links.open {
        transform: translateY(0);
        opacity: 1;
        pointer-events: all;
    }

    .nav-links a {
        font-size: 16px;
        padding: 8px 0;
    }

    .nav-toggle {
        display: flex;
    }
}