/* === UI/UX 2026 DESIGN SYSTEM === */
:root {
    --bg-base: #F8FAFC;
    --bg-base-rgb: 248, 250, 252;
    --bg-mesh-1: rgba(16, 185, 129, 0.15);
    --bg-mesh-2: rgba(245, 158, 11, 0.15);
    
    --card-bg: rgba(255, 255, 255, 0.7);
    --card-border: rgba(0, 0, 0, 0.06);
    --card-highlight: rgba(255, 255, 255, 0.82);
    --card-glow: rgba(16, 185, 129, 0.18);
    --card-shadow: 0 18px 48px -18px rgba(15, 23, 42, 0.18), 0 8px 24px -18px rgba(15, 23, 42, 0.12);
    
    --text-title: #0F172A;
    --text-body: #475569;
    --text-muted: #64748B;
    
    --accent-primary: #10B981;
    --accent-primary-rgb: 16, 185, 129;
    --accent-btn-bg: #0F172A;
    --accent-btn-text: #FFFFFF;
    --accent-icon: #D97706;
    
    --font-heading: 'Space Grotesk', sans-serif;
    --font-body: 'Inter', sans-serif;
    
    --radius-sm: 12px;
    --radius-md: 24px;
    --radius-lg: 32px;
    
    --transition-spring: all 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.1);
}

[data-theme="dark"] {
    --bg-base: #0B0F19;
    --bg-base-rgb: 11, 15, 25;
    --bg-mesh-1: rgba(16, 185, 129, 0.1);
    --bg-mesh-2: rgba(245, 158, 11, 0.05);
    
    --card-bg: rgba(255, 255, 255, 0.03);
    --card-border: rgba(255, 255, 255, 0.08);
    --card-highlight: rgba(255, 255, 255, 0.14);
    --card-glow: rgba(16, 185, 129, 0.22);
    --card-shadow: 0 22px 60px -18px rgba(0, 0, 0, 0.55), 0 8px 24px -18px rgba(16, 185, 129, 0.35);
    
    --text-title: #F8FAFC;
    --text-body: #94A3B8;
    --text-muted: #64748B;
    
    --accent-btn-bg: #E2E8F0;
    --accent-btn-text: #0F172A;
    --accent-icon: #FBBF24;
}

html {
    -webkit-text-size-adjust: 100%;
    text-size-adjust: 100%;
    scroll-behavior: smooth;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
button, input, textarea, select { font: inherit; }
img { max-width: 100%; }
body { 
    font-family: var(--font-body); 
    background-color: var(--bg-base);
    color: var(--text-body); 
    overflow-x: hidden; 
    line-height: 1.6; 
    min-height: 100vh;
    min-height: 100dvh;
    transition: background-color 0.4s ease, color 0.4s ease;
    -webkit-font-smoothing: antialiased;
}
body::before {
    content: '';
    position: fixed;
    inset: 0;
    z-index: -1;
    pointer-events: none;
    background: radial-gradient(520px circle at var(--cursor-x, 50vw) var(--cursor-y, 18vh), rgba(var(--accent-primary-rgb), 0.14), transparent 48%);
    opacity: 0.9;
}
h1, h2, h3, h4 { font-family: var(--font-heading); color: var(--text-title); font-weight: 700; letter-spacing: 0; transition: color 0.4s ease; }
a { text-decoration: none; }
a:focus-visible,
button:focus-visible {
    outline: 3px solid rgba(var(--accent-primary-rgb), 0.55);
    outline-offset: 3px;
}

.mesh-bg { position: fixed; top: 0; left: 0; width: 100vw; height: 100vh; height: 100dvh; z-index: -1; overflow: hidden; pointer-events: none; }
.mesh-bg::after { content: ''; position: absolute; inset: 0; background: radial-gradient(520px circle at var(--cursor-x, 50vw) var(--cursor-y, 18vh), rgba(var(--accent-primary-rgb), 0.12), transparent 48%); opacity: 0.9; }
.mesh-blob { position: absolute; border-radius: 50%; filter: blur(100px); opacity: 0.6; transition: background 0.5s ease; }
.blob-1 { top: -10%; left: -10%; width: 50vw; height: 50vw; background: var(--bg-mesh-1); animation: meshFloatOne 18s ease-in-out infinite alternate; }
.blob-2 { bottom: -10%; right: -10%; width: 60vw; height: 60vw; background: var(--bg-mesh-2); animation: meshFloatTwo 22s ease-in-out infinite alternate; }

@keyframes meshFloatOne {
    from { transform: translate3d(0, 0, 0) scale(1); }
    to { transform: translate3d(9vw, 7vh, 0) scale(1.12); }
}

@keyframes meshFloatTwo {
    from { transform: translate3d(0, 0, 0) scale(1); }
    to { transform: translate3d(-8vw, -6vh, 0) scale(1.08); }
}

header { position: fixed; top: 0; width: 100%; padding: 16px 5%; display: flex; justify-content: space-between; align-items: center; z-index: 100; backdrop-filter: blur(20px) saturate(160%); -webkit-backdrop-filter: blur(20px) saturate(160%); background: rgba(var(--bg-base-rgb), 0.72); border-bottom: 1px solid var(--card-border); transition: background 0.4s ease, border-color 0.4s ease; }
header { padding-left: max(5%, env(safe-area-inset-left)); padding-right: max(5%, env(safe-area-inset-right)); }
.logo-container { display: flex; align-items: center; gap: 12px; }
.logo-img { width: 40px; height: 40px; border-radius: var(--radius-sm); object-fit: cover; border: 1px solid var(--card-border); }
.brand-text { font-size: 1.4rem; font-weight: 700; letter-spacing: 0; color: var(--text-title); }
.brand-text span { color: var(--accent-primary); }

.nav-controls { display: flex; align-items: center; gap: 12px; }
.nav-link { color: var(--text-title); font-size: 0.9rem; font-weight: 600; padding: 10px 14px; border-radius: 999px; transition: var(--transition-spring); }
.nav-link:hover { color: var(--accent-primary); background: rgba(var(--accent-primary-rgb), 0.08); }
.exit-button { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 44px; padding: 10px 16px; border-radius: 999px; color: var(--text-title); background: var(--card-bg); border: 1px solid var(--card-border); font-size: 0.9rem; font-weight: 700; backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); transition: var(--transition-spring); }
.exit-button:hover { color: var(--accent-primary); border-color: rgba(var(--accent-primary-rgb), 0.32); transform: translateY(-2px); }
.lang-toggle, .theme-toggle { background: var(--card-bg); border: 1px solid var(--card-border); color: var(--text-title); border-radius: 999px; cursor: pointer; display: flex; align-items: center; justify-content: center; backdrop-filter: blur(10px); transition: var(--transition-spring); min-width: 44px; min-height: 44px; }
.lang-toggle { padding: 6px 16px; font-family: var(--font-heading); font-weight: 600; font-size: 0.85rem; }
.theme-toggle { font-size: 1rem; }
.lang-toggle:hover, .theme-toggle:hover { transform: translateY(-2px); border-color: var(--text-muted); }

.bento-card {
    position: relative;
    overflow: hidden;
    isolation: isolate;
    background:
        linear-gradient(135deg, var(--card-highlight), var(--card-bg) 42%, rgba(var(--accent-primary-rgb), 0.035)),
        var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-md);
    padding: 32px;
    backdrop-filter: blur(28px) saturate(165%);
    -webkit-backdrop-filter: blur(28px) saturate(165%);
    box-shadow: var(--card-shadow), inset 0 1px 0 rgba(255, 255, 255, 0.45), inset 0 -1px 0 rgba(255, 255, 255, 0.12);
    transition: var(--transition-spring);
}
.bento-card::before {
    content: '';
    position: absolute;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    background:
        radial-gradient(520px circle at var(--mouse-x, 50%) var(--mouse-y, 0%), rgba(255, 255, 255, 0.54), transparent 34%),
        radial-gradient(700px circle at 20% 0%, var(--card-glow), transparent 40%);
    opacity: 0.72;
    transition: opacity 0.35s ease;
}
.bento-card::after {
    content: '';
    position: absolute;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='180' height='180' filter='url(%23n)' opacity='0.42'/%3E%3C/svg%3E");
    opacity: 0.055;
    mix-blend-mode: soft-light;
}
.bento-card > * { position: relative; z-index: 1; }
.bento-card:hover { border-color: rgba(var(--accent-primary-rgb), 0.35); transform: translateY(-4px); box-shadow: var(--card-shadow), 0 0 34px -20px rgba(var(--accent-primary-rgb), 0.9), inset 0 1px 0 rgba(255, 255, 255, 0.58); }

.hero { padding: 160px 5% 80px; max-width: 1280px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; gap: 60px; min-height: 95vh; }
.hero-content { flex: 1.1; max-width: 600px; display: flex; flex-direction: column; justify-content: center; }

.badge { display: inline-block; background: var(--card-bg); color: var(--text-title); padding: 8px 16px; border-radius: 999px; font-size: 0.85rem; font-weight: 600; margin-bottom: 24px; border: 1px solid var(--card-border); width: fit-content; }
.hero h1 { font-size: 4.5rem; line-height: 1.02; margin-bottom: 24px; font-weight: 700; }
.hero h1 .brand-line { color: var(--text-title); display: inline-block; }
.hero h1 .highlight { color: var(--accent-primary); }
.hero p { font-size: 1.15rem; color: var(--text-body); margin-bottom: 32px; font-weight: 400; }

.cta-area { display: flex; flex-direction: column; gap: 12px; margin-bottom: 40px; }
.cta-buttons { display: grid; grid-template-columns: repeat(2, minmax(0, max-content)); align-items: center; gap: 10px; width: fit-content; max-width: 100%; }
.cta-button { position: relative; overflow: hidden; display: inline-flex; align-items: center; justify-content: center; gap: 12px; background: var(--accent-btn-bg); color: var(--accent-btn-text) !important; padding: 18px 36px; border-radius: 999px; font-size: 1.1rem; font-weight: 600; border: none; cursor: pointer; width: fit-content; min-height: 54px; transition: var(--transition-spring); }
.cta-button-muted,
.cta-button-outline { color: var(--text-title) !important; background: rgba(var(--bg-base-rgb), 0.5); border: 1px solid var(--card-border); }
.cta-button-muted { cursor: pointer; }
.cta-button-muted i,
.cta-button-outline i { color: var(--accent-primary); }
.cta-button-outline { padding-left: 24px; padding-right: 24px; }
.cta-button-guide { grid-column: 1 / -1; justify-self: stretch; width: 100%; }
.cta-button::after, .donate-btn::after { content: ''; position: absolute; inset: -30% auto -30% -45%; width: 34%; background: linear-gradient(90deg, transparent, rgba(255,255,255,0.58), transparent); transform: skewX(-18deg) translateX(-160%); transition: transform 0.75s ease; }
.cta-button:hover::after, .donate-btn:hover::after { transform: skewX(-18deg) translateX(560%); }
.cta-button > *, .donate-btn > * { position: relative; z-index: 1; }
.cta-button:hover { transform: translateY(-4px) scale(1.02); box-shadow: 0 20px 40px -10px rgba(0,0,0,0.2), 0 0 28px -12px rgba(var(--accent-primary-rgb), 0.85); opacity: 0.97; }
.cta-subtext { display: flex; align-items: center; gap: 8px; font-size: 0.9rem; color: var(--text-muted); }
.cta-subtext i { color: var(--accent-primary); }
.cta-subtext a { color: var(--text-title); font-weight: 600; border-bottom: 1px solid rgba(var(--accent-primary-rgb), 0.35); transition: color 0.25s ease, border-color 0.25s ease; }
.cta-subtext a:hover { color: var(--accent-primary); border-color: var(--accent-primary); }
.download-meta { display: grid; grid-template-columns: repeat(2, minmax(0, max-content)); gap: 10px 14px; align-items: center; width: fit-content; max-width: 100%; margin-top: 4px; padding: 12px 14px; border: 1px solid var(--card-border); border-radius: var(--radius-sm); background: rgba(var(--bg-base-rgb), 0.42); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px); box-shadow: inset 0 1px 0 rgba(255,255,255,0.34); }
.download-meta span { display: inline-flex; align-items: center; gap: 6px; font-size: 0.82rem; color: var(--text-muted); white-space: nowrap; }
.download-meta strong { color: var(--text-title); font-weight: 700; }
.download-meta .checksum { grid-column: 1 / -1; min-width: 0; align-items: flex-start; white-space: normal; }
.download-meta code { color: var(--text-body); font-size: 0.72rem; word-break: break-all; }

.dev-signature { display: flex; align-items: center; justify-content: space-between; padding-top: 24px; border-top: 1px solid var(--card-border); gap: 20px; flex-wrap: wrap; }
.dev-info { flex: 1; text-align: left; }
.dev-info h4 { font-size: 0.95rem; color: var(--text-muted); font-weight: 400; margin-bottom: 4px; }
.dev-name { font-family: var(--font-heading); font-size: 1.8rem; font-weight: 700; color: var(--text-title); }

a.link-author { display: inline-block; color: var(--text-title); transition: var(--transition-spring); }
a.link-author:hover { color: var(--accent-primary); transform: translateX(6px); }

.dev-contacts { display: flex; gap: 10px; }
.contact-pill { background: var(--card-bg); border: 1px solid var(--card-border); padding: 10px 16px; border-radius: 999px; font-size: 0.9rem; color: var(--text-title); font-weight: 500; display: flex; align-items: center; gap: 8px; transition: var(--transition-spring); min-height: 44px; }
.contact-pill:hover { background: var(--text-title); color: var(--bg-base); }

/* SLIDER DRAG */
.hero-mockups { flex: 0.9; display: flex; justify-content: center; align-items: center; width: 100%; max-width: 320px; margin: 0 auto; perspective: 1000px; }
.mockup-carousel { width: 100%; display: flex; flex-direction: column; gap: 20px; transform-style: preserve-3d; transition: transform 0.16s ease-out; }
.mockup-track { display: flex; overflow-x: auto; scroll-snap-type: x mandatory; scroll-behavior: smooth; -ms-overflow-style: none; scrollbar-width: none; -webkit-overflow-scrolling: touch; touch-action: pan-x; border-radius: var(--radius-lg); box-shadow: 0 28px 62px -16px rgba(0,0,0,0.22), 0 0 46px -22px rgba(var(--accent-primary-rgb), 0.8); cursor: grab; user-select: none; }
.mockup-track::-webkit-scrollbar { display: none; }
.mockup-track.active-drag { cursor: grabbing; scroll-behavior: auto; scroll-snap-type: none; }
.mockup-slide { flex: 0 0 100%; scroll-snap-align: center; padding: 4px; pointer-events: none; }
.mockup-img-wrapper { background: #0F172A; border: 8px solid #1E293B; border-radius: 36px; overflow: hidden; aspect-ratio: 9/19.5; display: flex; justify-content: center; align-items: center; box-shadow: inset 0 1px 0 rgba(255,255,255,0.16); }
.mockup-img { width: 100%; height: 100%; object-fit: cover; object-position: top; pointer-events: none; }

.carousel-indicators { display: flex; justify-content: center; gap: 12px; }
.indicator { width: 28px; height: 28px; border-radius: 50%; background: transparent; cursor: pointer; display: flex; align-items: center; justify-content: center; }
.indicator::after { content: ''; width: 8px; height: 8px; background: var(--card-border); border-radius: 50%; transition: background 0.3s ease, transform 0.3s ease; }
.indicator.active::after { background: var(--accent-primary); transform: scale(1.4); }

.offline-guarantee { max-width: 1280px; margin: 0 auto; padding: 0 5%; }
.guarantee-box { display: flex; align-items: center; gap: 24px; background: rgba(16, 185, 129, 0.05); border: 1px solid rgba(16, 185, 129, 0.2); }
.guarantee-icon { font-size: 2.5rem; color: var(--accent-primary); }
.guarantee-text h3 { font-size: 1.25rem; margin-bottom: 4px; }
.guarantee-text p { font-size: 1rem; color: var(--text-body); }

.release-section {
    max-width: 1000px;
    margin: 34px auto 0;
    padding: 0 5%;
    display: grid;
    grid-template-columns: minmax(260px, 0.82fr) minmax(360px, 1.18fr);
    align-items: center;
    gap: 24px;
}
.release-copy { display: flex; flex-direction: column; gap: 14px; }
.release-copy h2 { font-size: 2rem; line-height: 1.16; margin: 0; }
.release-copy p { color: var(--text-body); }
.release-card { padding: 26px; }
.release-list { list-style: none; display: grid; gap: 12px; }
.release-list li { display: grid; grid-template-columns: 36px 1fr; align-items: start; gap: 12px; color: var(--text-body); font-size: 0.96rem; }
.release-list i { width: 36px; height: 36px; display: inline-flex; align-items: center; justify-content: center; border-radius: 50%; color: var(--accent-primary); background: rgba(var(--accent-primary-rgb), 0.1); border: 1px solid rgba(var(--accent-primary-rgb), 0.18); }

.archive-section {
    max-width: 1000px;
    margin: 24px auto 0;
    padding: 0 5%;
    display: grid;
    grid-template-columns: minmax(260px, 1fr) auto;
    align-items: center;
    gap: 24px;
}
.archive-copy { display: flex; flex-direction: column; gap: 12px; }
.archive-copy h2 { font-size: 1.75rem; line-height: 1.16; margin: 0; }
.archive-copy p { color: var(--text-body); max-width: 620px; }
.archive-link { display: inline-flex; align-items: center; justify-content: center; gap: 10px; min-height: 54px; padding: 14px 20px; color: var(--text-title); font-size: 0.96rem; font-weight: 800; white-space: nowrap; transition: var(--transition-spring); }
.archive-link i { color: var(--accent-primary); font-size: 1.05rem; }
.archive-link:hover { color: var(--accent-primary); border-color: rgba(var(--accent-primary-rgb), 0.35); transform: translateY(-2px); }

.section-title { text-align: center; font-size: 2.5rem; margin: 100px 0 40px; }
.bento-grid { max-width: 1000px; margin: 0 auto; padding: 0 5%; display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.bento-large { grid-column: span 2; display: flex; flex-direction: column; justify-content: center; }
.card-icon { width: 48px; height: 48px; background: rgba(16, 185, 129, 0.1); color: var(--accent-primary); border-radius: var(--radius-sm); display: flex; justify-content: center; align-items: center; font-size: 1.4rem; margin-bottom: 24px; border: 1px solid rgba(16, 185, 129, 0.2); }
.bento-card h3 { font-size: 1.3rem; margin-bottom: 12px; }

.exchange-section {
    max-width: 1000px;
    margin: 34px auto 0;
    padding: 0 5%;
    display: grid;
    grid-template-columns: minmax(260px, 0.82fr) minmax(360px, 1.18fr);
    align-items: center;
    gap: 24px;
}
.exchange-copy { display: flex; flex-direction: column; gap: 14px; }
.exchange-copy h2 { font-size: 2rem; line-height: 1.16; margin: 0; }
.exchange-copy p { color: var(--text-body); }
.exchange-card { padding: 26px; }
.exchange-base { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding-bottom: 16px; border-bottom: 1px solid var(--card-border); }
.exchange-base span { color: var(--text-muted); font-size: 0.86rem; font-weight: 700; }
.exchange-base strong { color: var(--text-title); font-size: 1.1rem; }
.rate-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; margin-top: 20px; }
.rate-grid span { display: flex; align-items: center; justify-content: space-between; gap: 10px; min-height: 42px; padding: 10px 12px; border: 1px solid var(--card-border); border-radius: var(--radius-sm); background: rgba(var(--bg-base-rgb), 0.46); color: var(--text-body); font-size: 0.86rem; }
.rate-grid strong { color: var(--text-title); font-size: 0.9rem; font-weight: 800; }
.exchange-note { margin-top: 14px; color: var(--text-muted); font-size: 0.82rem; }

.app-preview {
    max-width: 1120px;
    margin: 0 auto;
    padding: 34px 5%;
    display: grid;
    grid-template-columns: minmax(280px, 0.9fr) minmax(360px, 1.1fr);
    align-items: center;
    gap: 42px;
}
.preview-copy { display: flex; flex-direction: column; gap: 16px; }
.preview-kicker { width: fit-content; padding: 7px 13px; border-radius: 999px; color: var(--accent-primary); background: rgba(var(--accent-primary-rgb), 0.1); border: 1px solid rgba(var(--accent-primary-rgb), 0.18); font-size: 0.82rem; font-weight: 800; }
.preview-copy h3 { font-size: 2rem; line-height: 1.16; margin: 0; }
.preview-copy p { color: var(--text-body); font-size: 1rem; }
.preview-points { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 4px; }
.preview-points span { display: inline-flex; align-items: center; min-height: 36px; padding: 7px 12px; border-radius: 999px; color: var(--text-title); background: rgba(var(--bg-base-rgb), 0.5); border: 1px solid var(--card-border); font-size: 0.88rem; font-weight: 700; }
.preview-phones { position: relative; min-height: 560px; display: flex; justify-content: center; align-items: center; }
.preview-phones::before { content: ''; position: absolute; width: 78%; height: 74%; border-radius: 50%; background: radial-gradient(circle, rgba(var(--accent-primary-rgb), 0.18), transparent 64%); filter: blur(12px); }
.preview-phone { position: relative; width: 250px; aspect-ratio: 9 / 19.5; border: 8px solid #162334; border-radius: 34px; overflow: hidden; background: #0F172A; box-shadow: 0 28px 70px -24px rgba(0,0,0,0.44), inset 0 1px 0 rgba(255,255,255,0.16); }
.preview-phone img { width: 100%; height: 100%; display: block; object-fit: cover; object-position: top; }
.preview-phone.primary { transform: rotate(-5deg) translateX(30px); z-index: 2; }
.preview-phone.secondary { margin-left: -68px; transform: rotate(6deg) translateY(26px); opacity: 0.92; z-index: 1; }
.preview-phone.iphone-frame { border-radius: 42px; border-color: #101827; }
.preview-phone.android-frame { border-radius: 30px; border-color: #1E293B; }
.phone-dynamic-island,
.phone-camera-dot {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    z-index: 3;
    background: #0B1020;
    pointer-events: none;
}
.phone-dynamic-island {
    top: 12px;
    width: 76px;
    height: 22px;
    border-radius: 999px;
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.1), 0 2px 10px rgba(0,0,0,0.18);
}
.phone-camera-dot {
    top: 12px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    border: 2px solid rgba(255,255,255,0.18);
    box-shadow: 0 2px 8px rgba(0,0,0,0.18);
}

.faq-section { max-width: 800px; margin: 0 auto; padding: 0 5% 60px; }
.faq-grid { display: flex; flex-direction: column; gap: 16px; }
.faq-item { padding: 24px 32px; }
.faq-item h4 { font-size: 1.1rem; display: flex; align-items: flex-start; gap: 12px; margin-bottom: 8px; }
.faq-item h4 i { color: var(--accent-primary); margin-top: 4px; }
.inline-link { color: var(--accent-primary); font-weight: 700; border-bottom: 1px solid rgba(var(--accent-primary-rgb), 0.34); transition: border-color 0.25s ease, color 0.25s ease; }
.inline-link:hover { color: var(--text-title); border-color: var(--text-title); }

.donation { padding: 40px 5% 80px; display: flex; justify-content: center; }
.donation-card { max-width: 920px; width: 100%; text-align: left; padding: 34px 36px; display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: center; gap: 28px; background: linear-gradient(145deg, var(--card-bg), rgba(16, 185, 129, 0.03)); }
.donation-copy { display: flex; flex-direction: column; align-items: flex-start; gap: 10px; }
.donation-kicker { display: inline-flex; align-items: center; min-height: 30px; padding: 5px 11px; border-radius: 999px; color: var(--accent-primary); background: rgba(var(--accent-primary-rgb), 0.1); border: 1px solid rgba(var(--accent-primary-rgb), 0.2); font-size: 0.78rem; font-weight: 800; }
.donation-card h3 { font-size: 1.45rem; color: var(--text-title); margin: 0; }
.donation-card p { max-width: 620px; font-size: 0.98rem; color: var(--text-body); margin: 0; }
.donation-action { display: flex; justify-content: flex-end; }

.donate-btn { position: relative; overflow: hidden; display: inline-flex; align-items: center; justify-content: center; gap: 10px; background: rgba(var(--bg-base-rgb), 0.5); color: var(--text-title); padding: 12px 20px; border-radius: 999px; font-size: 0.96rem; font-weight: 700; border: 1px solid var(--card-border); cursor: pointer; transition: var(--transition-spring); min-height: 46px; white-space: nowrap; }
.donate-btn::after { display: none; }
.donate-btn:hover { color: var(--accent-primary); border-color: rgba(var(--accent-primary-rgb), 0.35); transform: translateY(-2px); box-shadow: 0 14px 28px -20px rgba(var(--accent-primary-rgb), 0.8); }

.modal { display: none; position: fixed; z-index: 999; left: 0; top: 0; width: 100%; height: 100%; min-height: 100dvh; background-color: rgba(0, 0, 0, 0.5); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); align-items: center; justify-content: center; opacity: 0; transition: opacity 0.3s ease; }
.modal.show { display: flex; opacity: 1; }
.modal-content { max-width: 420px; width: 90%; text-align: center; transform: scale(0.95); padding: 40px; position: relative;}
.modal.show .modal-content { transform: scale(1); }
.close-btn { position: absolute; top: 16px; right: 16px; width: 40px; height: 40px; display: flex; justify-content: center; align-items: center; font-size: 24px; cursor: pointer; color: var(--text-muted); background: transparent; border: none; transition: var(--transition-spring); }
.close-btn:hover { color: var(--text-title); transform: rotate(90deg); }
.modal h3 { font-size: 1.5rem; margin-bottom: 8px; text-transform: none; }
.modal-subtitle { font-size: 0.95rem; color: var(--text-muted); max-width: 330px; margin: 0 auto; }
.modal-qr-img { width: 100%; height: auto; aspect-ratio: 1/1; object-fit: contain; border-radius: var(--radius-md); margin-top: 24px; border: 1px solid var(--card-border); }

.site-toast {
    position: fixed;
    left: 50%;
    bottom: max(28px, calc(env(safe-area-inset-bottom) + 18px));
    z-index: 1000;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    width: fit-content;
    max-width: calc(100vw - 32px);
    padding: 14px 22px;
    border: 1px solid var(--card-border);
    border-radius: 999px;
    background: rgba(var(--bg-base-rgb), 0.9);
    color: var(--text-title);
    box-shadow: var(--card-shadow);
    backdrop-filter: blur(18px) saturate(160%);
    -webkit-backdrop-filter: blur(18px) saturate(160%);
    transform: translate(-50%, 26px);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.28s ease, transform 0.28s ease, visibility 0.28s ease;
}
.site-toast.show { opacity: 1; visibility: visible; transform: translate(-50%, 0); }
.site-toast i { flex: 0 0 auto; color: var(--accent-primary); font-size: 1.05rem; }
.site-toast span { font-size: 0.92rem; font-weight: 700; line-height: 1.45; text-align: center; white-space: nowrap; }

.policy-main { max-width: 920px; margin: 0 auto; padding: 138px 5% 72px; }
.policy-hero { max-width: 820px; margin-bottom: 26px; padding-bottom: 24px; border-bottom: 1px solid var(--card-border); }
.policy-hero h1 { font-size: 2.85rem; line-height: 1.08; margin-bottom: 16px; }
.policy-hero p { font-size: 1.04rem; color: var(--text-body); margin-bottom: 14px; max-width: 780px; }
.policy-updated { color: var(--text-muted); font-size: 0.92rem; }
.policy-content { display: grid; gap: 18px; }
.policy-card { padding: 28px 32px; }
.policy-card h2 { font-size: 1.28rem; margin-bottom: 10px; }
.policy-list { display: grid; gap: 10px; padding-left: 20px; color: var(--text-body); }
.policy-list li::marker { color: var(--accent-primary); }

.install-main { max-width: 980px; margin: 0 auto; padding: 138px 5% 72px; }
.install-hero { max-width: 820px; margin-bottom: 26px; padding-bottom: 24px; border-bottom: 1px solid var(--card-border); }
.install-hero h1 { font-size: 2.85rem; line-height: 1.08; margin-bottom: 16px; }
.install-hero p { font-size: 1.04rem; color: var(--text-body); margin-bottom: 14px; max-width: 780px; }
.install-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 20px; }
.install-content { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.install-card { padding: 28px; }
.install-card .card-icon { margin-bottom: 18px; }
.install-card p { color: var(--text-body); }

.site-footer { text-align: center; padding: 48px 5%; border-top: 1px solid var(--card-border); background: rgba(0, 0, 0, 0.02); }
[data-theme="dark"] .site-footer { background: rgba(255, 255, 255, 0.01); }
[data-theme="dark"] .bento-card::before { background: radial-gradient(520px circle at var(--mouse-x, 50%) var(--mouse-y, 0%), rgba(255, 255, 255, 0.11), transparent 34%), radial-gradient(700px circle at 20% 0%, var(--card-glow), transparent 40%); }
.site-footer p { font-size: 0.95rem; font-weight: 500; color: var(--text-body); }
.footer-socials { display: flex; align-items: center; justify-content: center; gap: 14px; flex-wrap: wrap; margin-top: 18px; }
.footer-socials > span { color: var(--text-muted); font-size: 0.82rem; font-weight: 800; }
.footer-social-links { display: flex; align-items: center; justify-content: center; gap: 10px; flex-wrap: wrap; }
.footer-social-links a { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 40px; padding: 9px 14px; color: var(--text-title); font-size: 0.88rem; font-weight: 700; border-radius: 999px; border: 1px solid var(--card-border); background: rgba(var(--bg-base-rgb), 0.38); transition: var(--transition-spring); }
.footer-social-links a i { color: var(--accent-primary); font-size: 1rem; }
.footer-social-links a:hover { color: var(--accent-primary); border-color: rgba(var(--accent-primary-rgb), 0.32); transform: translateY(-2px); }
.footer-thanks { max-width: 760px; margin: 16px auto 0; color: var(--text-muted); font-size: 0.86rem; line-height: 1.6; }
.footer-links { display: flex; align-items: center; justify-content: center; margin-top: 18px; }
.footer-links a { display: inline-flex; align-items: center; justify-content: center; min-height: 44px; padding: 10px 18px; color: var(--text-title); font-size: 0.95rem; font-weight: 700; border-radius: 999px; border: 1px solid var(--card-border); background: rgba(var(--bg-base-rgb), 0.42); transition: var(--transition-spring); }
.footer-links a:hover { color: var(--accent-primary); border-color: rgba(var(--accent-primary-rgb), 0.32); transform: translateY(-2px); }

.back-to-top { position: fixed; bottom: max(30px, calc(env(safe-area-inset-bottom) + 18px)); right: max(30px, calc(env(safe-area-inset-right) + 18px)); width: 48px; height: 48px; border-radius: 50%; background: var(--accent-primary); color: #fff; border: none; box-shadow: 0 10px 25px rgba(16, 185, 129, 0.4); display: flex; justify-content: center; align-items: center; font-size: 1.2rem; cursor: pointer; z-index: 99; opacity: 0; visibility: hidden; transform: translateY(20px); transition: var(--transition-spring); }
.back-to-top.show { opacity: 1; visibility: visible; transform: translateY(0); }
.back-to-top:hover { transform: translateY(-5px); box-shadow: 0 15px 30px rgba(16, 185, 129, 0.5); }

/* Preloader tĩnh căn giữa - Đã loại bỏ hiệu ứng typewriter */
#preloader { position: fixed; inset: 0; background: var(--bg-base); z-index: 9999; display: flex; justify-content: center; align-items: center; transition: opacity 0.4s ease, visibility 0.4s ease; }
#preloader.hidden { opacity: 0; visibility: hidden; pointer-events: none; }
.loader-content { text-align: center; display: flex; flex-direction: column; align-items: center; justify-content: center; }
.loader-logo { border-radius: var(--radius-md); border: 1px solid var(--card-border); margin-bottom: 16px; }
.loader-text { font-family: var(--font-heading); font-size: 2rem; font-weight: 700; letter-spacing: 0; color: var(--text-title); display: flex; justify-content: center; align-items: center; }
.loader-text span { color: var(--accent-primary); margin-left: 6px; }

.reveal { opacity: 1; transform: none; }
.js-enabled .reveal { opacity: 0; transform: translateY(30px); transition: all 0.8s cubic-bezier(0.175, 0.885, 0.32, 1); }
.js-enabled .reveal.active { opacity: 1; transform: translateY(0); }
.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }

@supports not ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
    header,
    .bento-card,
    .download-meta,
    .exit-button,
    .lang-toggle,
    .theme-toggle {
        background: rgba(var(--bg-base-rgb), 0.94);
    }

    [data-theme="dark"] header,
    [data-theme="dark"] .bento-card,
    [data-theme="dark"] .download-meta,
    [data-theme="dark"] .exit-button,
    [data-theme="dark"] .lang-toggle,
    [data-theme="dark"] .theme-toggle {
        background: rgba(var(--bg-base-rgb), 0.92);
    }

    .modal { background-color: rgba(0, 0, 0, 0.72); }
}

@media (hover: none) {
    .bento-card:hover,
    .cta-button:hover,
    .donate-btn:hover,
    .contact-pill:hover,
    .footer-social-links a:hover,
    .footer-links a:hover,
    .exit-button:hover,
    .lang-toggle:hover,
    .theme-toggle:hover,
    .back-to-top:hover {
        transform: none;
    }
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        scroll-behavior: auto !important;
        transition-duration: 0.01ms !important;
    }

    .reveal {
        opacity: 1;
        transform: none;
    }

    .mockup-carousel {
        transform: none !important;
    }
}

/* Responsive Mobile & Tablet */
@media (max-width: 900px) {
    .hero { flex-direction: column; padding-top: 120px; text-align: center; gap: 50px; }
    .hero-content { align-items: center; }
    .hero h1 { font-size: 3.45rem; }
    .dev-signature { justify-content: center; flex-direction: column; gap: 16px; }
    .bento-grid { grid-template-columns: 1fr; }
    .bento-large { grid-column: span 1; }
    .release-section { grid-template-columns: 1fr; text-align: center; }
    .release-copy { align-items: center; }
    .release-list { text-align: left; }
    .archive-section { grid-template-columns: 1fr; text-align: center; }
    .archive-copy { align-items: center; }
    .archive-link { width: fit-content; margin: 0 auto; }
    .exchange-section { grid-template-columns: 1fr; text-align: center; }
    .exchange-copy { align-items: center; }
    .app-preview { grid-template-columns: 1fr; text-align: center; gap: 24px; }
    .preview-copy { align-items: center; }
    .donation-card { grid-template-columns: 1fr; text-align: center; }
    .donation-copy { align-items: center; }
    .donation-action { justify-content: center; }
    .preview-phones { min-height: 500px; }
    .hero-mockups { max-width: 280px; }
    .cta-buttons { justify-content: center; }
    .download-meta { grid-template-columns: repeat(2, minmax(0, max-content)); justify-content: center; }
    .policy-main { padding-top: 120px; }
    .policy-hero { text-align: center; margin-left: auto; margin-right: auto; }
    .policy-hero .badge { margin-left: auto; margin-right: auto; }
    .policy-hero h1 { font-size: 2.6rem; }
    .install-main { padding-top: 120px; }
    .install-hero { text-align: center; margin-left: auto; margin-right: auto; }
    .install-hero .badge { margin-left: auto; margin-right: auto; }
    .install-hero h1 { font-size: 2.6rem; }
    .install-actions { justify-content: center; }
    .install-content { grid-template-columns: 1fr; }
}
@media (max-width: 600px) {
    header { padding-top: 12px; padding-bottom: 12px; padding-left: max(4%, env(safe-area-inset-left)); padding-right: max(4%, env(safe-area-inset-right)); }
    .brand-text { font-size: 1.15rem; }
    .nav-controls { gap: 8px; }
    .nav-link { display: none; }
    .exit-button { min-width: auto; padding: 10px 14px; }
    .hero h1 { font-size: 2.55rem; }
    .cta-area { width: 100%; align-items: center; }
    .cta-buttons { grid-template-columns: 1fr; justify-content: center; width: 100%; max-width: 320px; }
    .cta-button-guide { grid-column: auto; }
    .cta-button { width: 100%; max-width: 320px; }
    .cta-subtext { flex-wrap: wrap; justify-content: center; }
    .download-meta { grid-template-columns: 1fr; width: 100%; max-width: 320px; justify-items: start; text-align: left; }
    .dev-contacts { flex-direction: column; width: 100%; max-width: 320px; }
    .contact-pill { justify-content: center; }
    .bento-card { padding: 24px; }
    .release-copy h2 { font-size: 1.45rem; }
    .release-card { padding: 22px; }
    .release-list li { grid-template-columns: 32px 1fr; font-size: 0.9rem; }
    .release-list i { width: 32px; height: 32px; }
    .archive-copy h2 { font-size: 1.45rem; }
    .archive-link { width: 100%; max-width: 320px; white-space: normal; text-align: center; }
    .exchange-copy h2 { font-size: 1.45rem; }
    .exchange-base { align-items: flex-start; flex-direction: column; gap: 6px; text-align: left; }
    .rate-grid { grid-template-columns: 1fr; }
    .rate-grid span { font-size: 0.84rem; }
    .preview-copy h3 { font-size: 1.45rem; }
    .preview-phones { min-height: 420px; }
    .preview-phone { width: 190px; border-width: 6px; border-radius: 28px; }
    .preview-phone.primary { transform: rotate(-4deg) translateX(28px); }
    .preview-phone.secondary { margin-left: -52px; transform: rotate(5deg) translateY(22px); }
    .policy-card, .faq-item { padding: 24px; }
    .guarantee-box { flex-direction: column; text-align: center; }
    .donation-card { padding: 28px 24px; }
    .donate-btn { width: 100%; max-width: 280px; }
    .policy-hero h1 { font-size: 2.45rem; }
    .modal-content { padding: 32px 20px; width: 95%; }
    .site-toast { align-items: center; border-radius: 999px; }
    .install-hero h1 { font-size: 2.45rem; }
    .install-actions .cta-button { max-width: none; }
    .install-content { grid-template-columns: 1fr; }
    .back-to-top { bottom: 20px; right: 20px; width: 44px; height: 44px; }
}