/* ===== Suno Downloader — landing =====
   Bảng màu riêng: cam nóng (đúng accent của app #FF8A1F) + hồng magenta cho
   chất "âm nhạc", nền gần đen. Cố ý khác Story (hổ phách+violet) và Voice (cyan). */
:root {
    --bg: #0a0710;
    --panel: rgba(255, 255, 255, .035);
    --panel-2: rgba(255, 255, 255, .06);
    --border: rgba(255, 255, 255, .09);
    --border-h: rgba(255, 138, 31, .40);
    --text: #f7f4f6;
    --dim: #a096a0;
    --orange: #ff8a1f;
    --orange-2: #ffb05a;
    --magenta: #ff3d81;
    --violet: #a855f7;
    --green: #34d399;
    --r: 14px;
    --font: 'Outfit', 'Space Grotesk', -apple-system, BlinkMacSystemFont, sans-serif;
    --serif: 'Fraunces', Georgia, serif;
    --mono: 'JetBrains Mono', Consolas, monospace;
    --maxw: 1180px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0 }
html { scroll-behavior: smooth; scroll-padding-top: 84px }

body {
    background: var(--bg);
    background-image:
        radial-gradient(circle 520px at 12% 8%, rgba(255, 138, 31, .11) 0%, transparent 70%),
        radial-gradient(circle 460px at 88% 26%, rgba(255, 61, 129, .10) 0%, transparent 70%),
        radial-gradient(circle 420px at 50% 96%, rgba(168, 85, 247, .06) 0%, transparent 65%);
    background-attachment: fixed;
    color: var(--text);
    font-family: var(--font);
    line-height: 1.65;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

.grain {
    position: fixed; inset: 0; z-index: 0; pointer-events: none; opacity: .04;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
    background-size: 256px;
}

#cursor-glow {
    position: fixed; width: 420px; height: 420px; border-radius: 50%;
    background: radial-gradient(circle, rgba(255, 138, 31, .08) 0%, transparent 62%);
    pointer-events: none; z-index: 1; transform: translate(-50%, -50%);
    transition: opacity .3s; opacity: 0;
}

.mono { font-family: var(--mono) }
.accent { color: var(--orange) }
.grad {
    background: linear-gradient(100deg, var(--orange-2) 0%, var(--orange) 40%, var(--magenta) 100%);
    -webkit-background-clip: text; background-clip: text; color: transparent;
}

/* ===== NAV ===== */
.nav {
    position: fixed; top: 0; left: 0; right: 0; z-index: 50;
    backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
    background: rgba(10, 7, 16, .55); border-bottom: 1px solid transparent;
    transition: background .3s, border-color .3s;
}
.nav.scrolled { background: rgba(10, 7, 16, .88); border-bottom-color: var(--border) }
.nav-inner {
    max-width: var(--maxw); margin: 0 auto; padding: .85rem 1.5rem;
    display: flex; align-items: center; justify-content: space-between; gap: 1rem;
}
.nav-logo {
    display: flex; align-items: center; gap: .55rem; font-size: .78rem; font-weight: 700;
    letter-spacing: .09em; color: var(--text); text-decoration: none; white-space: nowrap;
}
.nav-icon { width: 22px; height: 22px; border-radius: 6px; object-fit: cover }
.nav-links { display: flex; align-items: center; gap: 1.35rem }
.nav-links a {
    color: var(--dim); text-decoration: none; font-size: .9rem; font-weight: 500;
    transition: color .2s; position: relative;
}
.nav-links a:hover { color: var(--orange) }
.lang-toggle {
    display: inline-flex; align-items: center; gap: .35rem; padding: .3rem .6rem;
    border: 1px solid var(--border); border-radius: 999px; cursor: pointer;
}
.lang-toggle:hover { border-color: var(--border-h) }
.lang-code { font-family: var(--mono); font-size: .72rem }

/* ===== HERO ===== */
.hero {
    position: relative; z-index: 2; max-width: var(--maxw); margin: 0 auto;
    padding: 9rem 1.5rem 4rem;
    display: grid; grid-template-columns: 1fr 1.05fr; gap: 3.2rem; align-items: center;
}
.eyebrow {
    display: inline-flex; align-items: center; gap: .5rem; font-size: .68rem; letter-spacing: .16em;
    color: var(--orange); border: 1px solid rgba(255, 138, 31, .3); border-radius: 999px;
    padding: .3rem .8rem; background: rgba(255, 138, 31, .06);
}
.dot-live {
    width: 6px; height: 6px; border-radius: 50%; background: var(--orange);
    box-shadow: 0 0 0 0 rgba(255, 138, 31, .6); animation: pulse 2s infinite;
}
@keyframes pulse { 70% { box-shadow: 0 0 0 8px rgba(255, 138, 31, 0) } 100% { box-shadow: 0 0 0 0 rgba(255, 138, 31, 0) } }

.hero h1 {
    font-family: var(--serif); font-weight: 600; font-size: clamp(2.4rem, 5.2vw, 3.9rem);
    line-height: 1.08; letter-spacing: -.02em; margin: 1.1rem 0 1rem;
}
.hero-desc { color: var(--dim); font-size: 1.03rem; max-width: 33rem }
.hero-btns { display: flex; flex-wrap: wrap; gap: .7rem; margin: 1.8rem 0 1.6rem }

.btn-main, .btn-ghost {
    display: inline-flex; align-items: center; gap: .5rem; padding: .72rem 1.25rem;
    border-radius: 10px; text-decoration: none; font-weight: 600; font-size: .93rem;
    transition: transform .18s, box-shadow .18s, border-color .2s, background .2s;
}
.btn-main {
    background: linear-gradient(100deg, var(--orange) 0%, #e0602f 100%);
    color: #1a0e06; border: 1px solid rgba(255, 176, 90, .5);
}
.btn-main:hover { transform: translateY(-2px); box-shadow: 0 10px 28px rgba(255, 138, 31, .26) }
.btn-ghost { background: var(--panel); color: var(--text); border: 1px solid var(--border) }
.btn-ghost:hover { border-color: var(--border-h); background: var(--panel-2) }
.btn-lg { padding: .9rem 1.6rem; font-size: 1rem }

.hero-stats { display: flex; gap: 2.2rem; flex-wrap: wrap }
.hstat { display: flex; flex-direction: column }
.hstat b { font-family: var(--mono); font-size: 1.6rem; color: var(--orange); line-height: 1.1 }
.hstat span { font-size: .78rem; color: var(--dim) }

/* window frame quanh ảnh chụp app */
.frame {
    border: 1px solid var(--border); border-radius: var(--r); overflow: hidden;
    background: #0d0a14; box-shadow: 0 24px 60px rgba(0, 0, 0, .55);
}
.frame-bar {
    display: flex; align-items: center; gap: .4rem; padding: .5rem .75rem;
    background: rgba(255, 255, 255, .04); border-bottom: 1px solid var(--border);
}
.frame-bar i { width: 9px; height: 9px; border-radius: 50%; background: #3a3a4d; display: block }
.frame-bar i:first-child { background: #ff5f57 } .frame-bar i:nth-child(2) { background: #febc2e }
.frame-bar i:nth-child(3) { background: #28c840 }
.frame-bar span { margin-left: .5rem; font-size: .68rem; color: var(--dim) }
.frame img { display: block; width: 100%; height: auto }
figcaption { margin-top: .6rem; font-size: .7rem; color: var(--dim); text-align: center }

/* ===== SECTIONS ===== */
.sect { position: relative; z-index: 2; max-width: var(--maxw); margin: 0 auto; padding: 5rem 1.5rem }
.sect-head { max-width: 46rem; margin-bottom: 3rem }
.kicker { display: block; font-size: .68rem; letter-spacing: .18em; color: var(--orange); margin-bottom: .7rem }
.sect h2 { font-family: var(--serif); font-weight: 600; font-size: clamp(1.8rem, 3.6vw, 2.6rem); letter-spacing: -.015em }
.sect-sub { color: var(--dim); margin-top: .7rem }

/* ===== STEPS ===== */
.steps { list-style: none; display: flex; flex-direction: column; gap: 4.5rem }
.step { display: grid; grid-template-columns: .82fr 1.18fr; gap: 2.6rem; align-items: center }
.step.alt .step-text { order: 2 }
.step-num {
    display: inline-block; font-size: .75rem; color: var(--orange); letter-spacing: .1em;
    border: 1px solid rgba(255, 138, 31, .3); border-radius: 6px; padding: .1rem .5rem; margin-bottom: .7rem;
}
.step-text h3 { font-family: var(--serif); font-size: 1.6rem; font-weight: 600; margin-bottom: .6rem }
.step-text p { color: var(--dim); font-size: .97rem }
.step-text b { color: var(--text); font-weight: 600 }
.step-tags { list-style: none; display: flex; flex-wrap: wrap; gap: .4rem; margin-top: 1rem }
.step-tags li {
    font-size: .68rem; color: var(--dim); padding: .18rem .55rem;
    border: 1px solid var(--border); border-radius: 999px; background: var(--panel);
}
.step-shot img {
    display: block; width: 100%; height: auto; border-radius: var(--r);
    border: 1px solid var(--border); box-shadow: 0 18px 46px rgba(0, 0, 0, .5);
    transition: transform .35s, border-color .35s;
}
.step-shot img:hover { transform: translateY(-4px) scale(1.008); border-color: var(--border-h) }

/* ===== FORMATS (thay MODES) ===== */
.mode-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(255px, 1fr)); gap: 1.1rem }
.mode-card {
    border: 1px solid var(--border); border-radius: var(--r); padding: 1.4rem;
    background: var(--panel); transition: transform .25s, border-color .25s, background .25s;
}
.mode-card:hover { transform: translateY(-3px); border-color: var(--border-h); background: var(--panel-2) }
.mode-card header { display: flex; align-items: center; gap: .6rem; margin-bottom: .8rem }
.mode-ic { font-size: 1.3rem }
.mode-tag {
    font-size: .6rem; letter-spacing: .12em; padding: .16rem .5rem; border-radius: 999px;
    color: var(--orange); background: rgba(255, 138, 31, .12); border: 1px solid rgba(255, 138, 31, .28);
}
.mode-tag.t-magenta { color: var(--magenta); background: rgba(255, 61, 129, .12); border-color: rgba(255, 61, 129, .28) }
.mode-tag.t-green { color: var(--green); background: rgba(52, 211, 153, .12); border-color: rgba(52, 211, 153, .28) }
.mode-tag.t-violet { color: var(--violet); background: rgba(168, 85, 247, .14); border-color: rgba(168, 85, 247, .3) }
.mode-card h3 { font-family: var(--serif); font-size: 1.25rem; font-weight: 600; margin-bottom: .45rem }
.mode-card p { color: var(--dim); font-size: .87rem }
.mode-card.is-star { border-color: rgba(255, 138, 31, .32); background: linear-gradient(160deg, rgba(255, 138, 31, .09), var(--panel) 60%) }
.mode-flag { display: inline-block; margin-top: .8rem; font-size: .66rem; color: var(--orange) }

/* ===== POWER ===== */
.power-wrap { display: grid; grid-template-columns: 1.05fr .95fr; gap: 2.6rem; align-items: center }
.power-list { display: flex; flex-direction: column; gap: 1.5rem }
.pw { display: flex; gap: .9rem }
.pw-ic {
    flex: none; width: 38px; height: 38px; display: grid; place-items: center; font-size: 1.05rem;
    border-radius: 10px; background: var(--panel-2); border: 1px solid var(--border);
}
.pw h4 { font-size: 1rem; margin-bottom: .25rem }
.pw p { color: var(--dim); font-size: .9rem }
.power-shot .frame { box-shadow: 0 18px 46px rgba(0, 0, 0, .5) }

.chips { display: flex; flex-wrap: wrap; gap: .5rem; margin-top: 3rem }
.chips span {
    display: inline-flex; align-items: center; gap: .45rem; font-size: .78rem; color: var(--dim);
    padding: .35rem .75rem; border: 1px solid var(--border); border-radius: 999px; background: var(--panel);
}
.chips i { color: var(--orange); font-size: .8rem }

/* ===== CTA ===== */
.cta {
    position: relative; z-index: 2; max-width: 46rem; margin: 2rem auto 5rem; padding: 3rem 1.5rem;
    text-align: center; border: 1px solid var(--border); border-radius: 20px;
    background: linear-gradient(160deg, rgba(255, 138, 31, .07), rgba(255, 61, 129, .05));
}
.cta h2 { font-family: var(--serif); font-size: clamp(1.6rem, 3.4vw, 2.2rem); font-weight: 600 }
.cta p { color: var(--dim); margin: .6rem 0 1.6rem }
.cta-btns { display: flex; flex-wrap: wrap; gap: .7rem; justify-content: center }

/* ===== FOOTER ===== */
.footer { position: relative; z-index: 2; border-top: 1px solid var(--border); padding: 3rem 1.5rem }
.footer-in { max-width: var(--maxw); margin: 0 auto; text-align: center }
.footer-logo { font-size: .8rem; letter-spacing: .1em }
.footer-tag { color: var(--dim); font-size: .88rem; margin: .5rem 0 1.2rem }
.footer-links { display: flex; flex-wrap: wrap; justify-content: center; gap: 1.2rem; margin-bottom: 1.2rem }
.footer-links a { color: var(--dim); text-decoration: none; font-size: .85rem; transition: color .2s }
.footer-links a:hover { color: var(--orange) }
.footer-copy { font-size: .78rem; color: #66607a }
.footer-copy a { color: var(--dim); text-decoration: none }

/* ===== REVEAL ===== */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .6s ease, transform .6s ease }
.reveal.visible { opacity: 1; transform: none }

/* ===== RESPONSIVE ===== */
@media (max-width: 940px) {
    .hero { grid-template-columns: 1fr; padding-top: 7rem; gap: 2.4rem }
    .step, .power-wrap { grid-template-columns: 1fr; gap: 1.4rem }
    .step.alt .step-text { order: 0 }
    .nav-links a:not(.lang-toggle):not([href^="http"]) { display: none }
}
@media (max-width: 560px) {
    .sect { padding: 3.4rem 1.1rem }
    .hero { padding: 6.4rem 1.1rem 2.5rem }
    .hero-stats { gap: 1.4rem }
    .steps { gap: 3rem }
    .nav-inner { padding: .7rem 1.1rem }
}
@media (prefers-reduced-motion: reduce) {
    .reveal { opacity: 1; transform: none; transition: none }
    html { scroll-behavior: auto }
    .dot-live { animation: none }
}