:root {
  --bg: #0A0A10; --card: #14141F; --card-2: #1B1B29; --line: #2A2A3D;
  --text: #F4F2FF; --muted: #A5A1BD; --faint: #6E6A86;
  --coral: #FF7A59; --pink: #E0508F; --violet: #A46BFF; --ok: #4BE3A7; --hot: #FF5470;
  --grad: linear-gradient(135deg, var(--coral), var(--pink) 50%, var(--violet));
  --mono: 'IBM Plex Mono', ui-monospace, monospace;
  --display: 'Bricolage Grotesque', 'Manrope', sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0; min-height: 100vh; color: var(--text);
  font: 15px/1.55 'Manrope', system-ui, sans-serif;
  background:
    radial-gradient(700px 380px at 50% -80px, rgba(164,107,255,.22), transparent 70%),
    radial-gradient(520px 300px at 85% 140px, rgba(255,122,89,.12), transparent 70%),
    var(--bg);
}
a { color: inherit; }
button, select, input, textarea { font: inherit; color: inherit; }
:focus-visible { outline: 2px solid var(--violet); outline-offset: 2px; }
[hidden] { display: none !important; }
.wrap { max-width: 1120px; margin: 0 auto; padding: 0 16px; }
.eyebrow { font: 500 11px var(--mono); letter-spacing: .18em; text-transform: uppercase; color: var(--muted); margin: 0 0 12px; }
.grad-text { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }

/* top bar */
.top { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 18px 0; }
.brand { display: flex; align-items: center; gap: 10px; font: 800 20px var(--display); letter-spacing: -.01em; text-decoration: none; }
.brand-mark { width: 34px; height: 34px; border-radius: 10px; background: var(--grad); display: grid; place-items: center; flex: none; }
.top-right { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; justify-content: flex-end; }
.top .gen { padding: 9px 18px; font-size: 14px; border-radius: 999px; }
@media (max-width: 560px) { .hide-sm { display: none !important; } }
.nav-links { display: flex; gap: 22px; font-size: 14px; color: var(--muted); }
.nav-links a { text-decoration: none; }
.nav-links a:hover { color: var(--text); }
@media (max-width: 720px) { .nav-links { display: none; } }
.settings select option, .settings select optgroup { background: var(--card); }
.btn-soft { background: var(--card); border: 1px solid var(--line); border-radius: 999px; padding: 9px 16px; cursor: pointer; font-size: 14px; text-decoration: none; display: inline-block; }
.btn-soft:hover { border-color: var(--muted); }
.credits { font-weight: 700; }
.credits b { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.btn-2 { background: var(--card-2); border: 1px solid var(--line); border-radius: 12px; padding: 12px 16px; cursor: pointer; font-weight: 700; text-decoration: none; display: inline-block; }
.btn-2:hover { border-color: var(--muted); }
.gen {
  border: 0; border-radius: 12px; padding: 12px 26px; background: var(--grad); color: #fff; font-weight: 700; font-size: 15px;
  cursor: pointer; box-shadow: 0 10px 30px -10px rgba(224,80,143,.8); text-decoration: none; display: inline-block; text-align: center;
}
.gen:hover { filter: brightness(1.08); }
.gen:disabled, .btn-2:disabled { opacity: .45; cursor: not-allowed; filter: none; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; }
.chip { background: var(--card); border: 1px solid var(--line); border-radius: 999px; padding: 7px 14px; font-size: 13px; cursor: pointer; }
.chip:hover { border-color: var(--coral); }

/* hero */
.hero { text-align: center; padding: 34px 0 26px; }
h1 { font: 800 clamp(32px, 6vw, 58px)/1.02 var(--display); letter-spacing: -.02em; margin: 0 auto; max-width: 820px; }
h1 em { font-style: normal; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.lede { color: var(--muted); max-width: 600px; margin: 14px auto 0; font-size: 16px; }
.cta-row { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; margin-top: 24px; }
.cta-row .gen, .cta-row .btn-2 { padding: 14px 26px; font-size: 16px; }
.cta-note { font: 11px var(--mono); color: var(--faint); margin-top: 12px; letter-spacing: .08em; }

/* landing sections */
.section { padding: 64px 0 8px; }
.section > h2, .section-title { font: 800 clamp(26px, 4vw, 40px)/1.1 var(--display); letter-spacing: -.02em; text-align: center; margin: 0 0 10px; }
.section-lede { text-align: center; color: var(--muted); max-width: 620px; margin: 0 auto 32px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
@media (max-width: 860px) { .grid-3 { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .grid-3 { grid-template-columns: 1fr; } }
.feature { background: var(--card); border: 1px solid var(--line); border-radius: 18px; padding: 20px; }
.feature h3 { font: 700 18px var(--display); margin: 10px 0 6px; }
.feature p { margin: 0; color: var(--muted); font-size: 14px; }
.feature .ico { width: 38px; height: 38px; border-radius: 10px; display: grid; place-items: center; background: var(--card-2); border: 1px solid var(--line); font-size: 18px; }
.steps { counter-reset: step; }
.step::before { counter-increment: step; content: counter(step); display: grid; place-items: center; width: 34px; height: 34px; border-radius: 50%; background: var(--grad); font: 800 16px var(--display); color: #fff; }
.tier-compare { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; max-width: 860px; margin: 0 auto; }
@media (max-width: 640px) { .tier-compare { grid-template-columns: 1fr; } }
.tier-card { background: var(--card); border: 1px solid var(--line); border-radius: 18px; padding: 22px; }
.tier-card.premium { border-color: rgba(164,107,255,.6); box-shadow: 0 20px 60px -30px rgba(164,107,255,.6); }
.tier-card h3 { font: 800 22px var(--display); margin: 0; display: flex; justify-content: space-between; align-items: baseline; gap: 8px; }
.tier-card h3 small { font: 500 12px var(--mono); color: var(--muted); }
.tier-card ul { margin: 12px 0 0; padding-left: 18px; color: var(--muted); font-size: 14px; }
.tier-card li { margin: 4px 0; }

/* example output on landing */
.demo { max-width: 860px; margin: 0 auto; }
.demo-input { display: flex; gap: 10px; align-items: center; justify-content: center; flex-wrap: wrap; margin-bottom: 14px; color: var(--muted); font-size: 14px; }
.demo-input span { background: var(--card); border: 1px solid var(--line); border-radius: 999px; padding: 6px 14px; color: var(--text); }

/* pricing */
.interval { display: flex; gap: 4px; justify-content: center; margin: 0 auto 22px; background: var(--card); border: 1px solid var(--line); border-radius: 999px; padding: 4px; width: fit-content; }
.interval button { background: transparent; border: 0; border-radius: 999px; padding: 8px 16px; cursor: pointer; color: var(--muted); font-size: 14px; }
.interval button[aria-pressed="true"] { background: var(--card-2); color: var(--text); box-shadow: inset 0 0 0 1px var(--line); }
.plans { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
@media (max-width: 860px) { .plans { grid-template-columns: 1fr; max-width: 420px; margin: 0 auto; } }
.plan { position: relative; background: var(--card); border: 1px solid var(--line); border-radius: 20px; padding: 24px 22px; display: flex; flex-direction: column; gap: 6px; }
.plan.hot { border-color: rgba(224,80,143,.7); box-shadow: 0 24px 70px -30px rgba(224,80,143,.7); }
.plan.current { border-color: var(--ok); }
.badge { position: absolute; top: -11px; left: 50%; transform: translateX(-50%); background: var(--grad); color: #fff; font: 700 11px var(--mono); letter-spacing: .1em; text-transform: uppercase; padding: 4px 12px; border-radius: 999px; white-space: nowrap; }
.plan.current .badge { background: var(--ok); color: var(--bg); }
.plan-name { font: 800 20px var(--display); }
.plan-price { font: 800 38px var(--display); letter-spacing: -.02em; }
.plan-price em { font: 500 14px 'Manrope', sans-serif; color: var(--muted); font-style: normal; }
.plan-sub { color: var(--muted); font-size: 14px; min-height: 1.5em; }
.plan-credits { font-weight: 700; }
.plan .gen, .plan .btn-2 { margin-top: 10px; width: 100%; }
.plans-note { text-align: center; color: var(--muted); font-size: 14px; margin: 18px auto 0; max-width: 640px; }

/* faq */
.faq { max-width: 760px; margin: 0 auto; }
.faq details { border-bottom: 1px solid var(--line); padding: 16px 4px; }
.faq summary { cursor: pointer; font-weight: 700; font-size: 16px; }
.faq details p { color: var(--muted); margin: 10px 0 0; }
.footer { border-top: 1px solid var(--line); margin-top: 72px; padding: 26px 0 40px; display: flex; flex-wrap: wrap; gap: 16px; justify-content: space-between; color: var(--faint); font-size: 13px; }
.footer nav { display: flex; gap: 18px; }
.footer a { text-decoration: none; }
.footer a:hover { color: var(--text); }

/* legal pages */
.legal { max-width: 760px; margin: 0 auto; padding: 20px 0 40px; }
.legal h1 { text-align: left; font-size: clamp(30px, 5vw, 44px); margin: 10px 0 6px; }
.legal h2 { font: 700 20px var(--display); margin: 30px 0 8px; }
.legal p, .legal li { color: var(--muted); }

/* composer */
.composer { max-width: 860px; margin: 0 auto; background: var(--card); border: 1px solid var(--line); border-radius: 20px; padding: 18px; box-shadow: 0 30px 80px -40px rgba(164,107,255,.45); }
.seg { display: grid; grid-template-columns: repeat(3, 1fr); background: var(--bg); border: 1px solid var(--line); border-radius: 12px; padding: 4px; gap: 4px; }
.seg.two { grid-template-columns: 1fr 1fr; }
.seg button { background: transparent; border: 0; border-radius: 9px; padding: 9px 6px; cursor: pointer; color: var(--muted); }
.seg b { display: block; font-size: 14px; }
.seg small { display: block; font: 10px var(--mono); opacity: .8; }
.seg button.on { background: var(--card-2); color: var(--text); box-shadow: inset 0 0 0 1px var(--line); }
.seg button.on small { color: var(--coral); }
.caption { font-size: 13px; color: var(--muted); margin: 10px 2px 12px; }
textarea {
  width: 100%; min-height: 150px; resize: vertical; background: var(--bg); border: 1px solid var(--line);
  border-radius: 14px; padding: 14px 16px; font-size: 16px; line-height: 1.55;
}
textarea:focus { border-color: var(--violet); outline: none; }
textarea::placeholder, input::placeholder { color: var(--faint); }
.settings { display: grid; grid-template-columns: 1fr 1.4fr 1fr 1fr; gap: 10px; margin-top: 12px; }
@media (max-width: 640px) { .settings { grid-template-columns: 1fr 1fr; } }
.settings label { min-width: 0; display: flex; flex-direction: column; gap: 4px; font: 10px var(--mono); letter-spacing: .14em; text-transform: uppercase; color: var(--muted); }
.settings select { width: 100%; min-width: 0; background: var(--bg); border: 1px solid var(--line); border-radius: 10px; padding: 10px; font: 500 14px 'Manrope', sans-serif; letter-spacing: 0; text-transform: none; color: var(--text); cursor: pointer; }
.settings select:disabled { opacity: .4; cursor: not-allowed; }
.actions { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-top: 14px; }
.tog { display: flex; align-items: center; gap: 8px; background: transparent; border: 1px solid var(--line); border-radius: 999px; padding: 7px 13px; font-size: 13px; color: var(--muted); cursor: pointer; }
.tog i { width: 26px; height: 15px; border-radius: 999px; background: var(--line); position: relative; transition: background .15s; }
.tog i::after { content: ""; position: absolute; top: 2px; left: 2px; width: 11px; height: 11px; border-radius: 50%; background: var(--text); transition: transform .15s; }
.tog[aria-pressed="true"] { color: var(--text); border-color: var(--violet); }
.tog[aria-pressed="true"] i { background: var(--violet); }
.tog[aria-pressed="true"] i::after { transform: translateX(11px); }
.tog:disabled { opacity: .35; cursor: not-allowed; }
.spacer { flex: 1; }
.go-row { display: flex; gap: 10px; align-items: stretch; margin-top: 14px; flex-wrap: wrap; }
.go-row .seg { flex: 1 1 260px; }
.go-row .btn-2, .go-row .gen { flex: 0 0 auto; white-space: nowrap; }
@media (max-width: 640px) { .go-row .btn-2, .go-row .gen { flex: 1; } }
.hintline { text-align: right; font: 11px var(--mono); color: var(--faint); margin: 8px 2px 0; }

/* output area */
#out { padding: 28px 0 70px; display: flex; flex-direction: column; gap: 16px; }
.err { max-width: 860px; width: 100%; margin: 0 auto; background: rgba(255,84,112,.1); border: 1px solid rgba(255,84,112,.45); color: #FFC4CE; border-radius: 12px; padding: 12px 16px; }
.ok-msg { max-width: 860px; width: 100%; margin: 0 auto; background: rgba(75,227,167,.08); border: 1px solid rgba(75,227,167,.35); border-radius: 12px; padding: 12px 16px; }
.try { text-align: center; }
.loading { max-width: 860px; width: 100%; margin: 0 auto; background: var(--card); border: 1px solid var(--line); border-radius: 20px; padding: 40px 20px; text-align: center; }
.eq { display: flex; gap: 5px; justify-content: center; align-items: end; height: 40px; margin-bottom: 18px; }
.eq span { width: 6px; border-radius: 3px; background: var(--grad); animation: eq 1.1s ease-in-out infinite; }
.eq span:nth-child(2n) { animation-duration: .9s; } .eq span:nth-child(3n) { animation-duration: 1.3s; }
@keyframes eq { 0%, 100% { height: 8px; } 50% { height: 40px; } }
@media (prefers-reduced-motion: reduce) { .eq span { animation: none; height: 22px; } html { scroll-behavior: auto; } }
.load-line { font-weight: 700; }
.load-sub { font: 11px var(--mono); color: var(--faint); margin-top: 6px; }

/* result sheet */
.sheet { background: var(--card); border: 1px solid var(--line); border-radius: 22px; overflow: hidden; }
.sheet-head { display: flex; gap: 18px; align-items: center; padding: 20px; background: linear-gradient(180deg, var(--card-2), var(--card)); border-bottom: 1px solid var(--line); }
.cover { width: 92px; height: 92px; border-radius: 16px; flex: none; display: flex; align-items: end; justify-content: center; gap: 3px; padding: 14px 10px; }
.cover span { width: 4px; border-radius: 2px; background: rgba(255,255,255,.85); }
.sheet-meta { min-width: 0; }
h2.song { font: 800 clamp(22px, 3.6vw, 34px)/1.1 var(--display); margin: 4px 0 8px; overflow-wrap: anywhere; }
.tags { display: flex; flex-wrap: wrap; gap: 6px; }
.tag { font: 11px var(--mono); border: 1px solid var(--line); border-radius: 999px; padding: 3px 10px; color: var(--muted); }
.specs { display: grid; grid-template-columns: repeat(4, 1fr); border-bottom: 1px solid var(--line); }
@media (max-width: 760px) { .specs { grid-template-columns: 1fr 1fr; } }
.spec { padding: 14px 20px; border-right: 1px solid var(--line); }
.spec:last-child { border-right: 0; }
@media (max-width: 760px) { .spec:nth-child(2n) { border-right: 0; } .spec:nth-child(-n+2) { border-bottom: 1px solid var(--line); } }
.spec p { margin: 0; font: 10px var(--mono); letter-spacing: .14em; text-transform: uppercase; color: var(--faint); }
.spec div { font-size: 14px; font-weight: 500; margin-top: 3px; }
.note { margin: 16px 20px 0; padding: 12px 14px; border-radius: 12px; background: rgba(75,227,167,.07); border: 1px solid rgba(75,227,167,.25); font-size: 14px; }
.note b { color: var(--ok); }
.cols { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; padding: 16px 20px 20px; align-items: start; }
.cols.single { grid-template-columns: 1fr; }
@media (max-width: 860px) { .cols { grid-template-columns: 1fr; } }
.col { display: flex; flex-direction: column; gap: 16px; min-width: 0; }
.block { background: var(--bg); border: 1px solid var(--line); border-radius: 14px; overflow: hidden; }
.bhead { display: flex; justify-content: space-between; align-items: center; padding: 10px 14px; border-bottom: 1px solid var(--line); }
.blabel { font: 500 11px var(--mono); letter-spacing: .14em; text-transform: uppercase; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.copy { background: var(--card-2); border: 1px solid var(--line); border-radius: 8px; padding: 5px 12px; font: 11px var(--mono); color: var(--muted); cursor: pointer; }
.copy:hover { color: var(--text); border-color: var(--violet); }
.hint { margin: 10px 12px 0; padding: 9px 12px; border-radius: 8px; background: rgba(164,107,255,.1); border: 1px solid rgba(164,107,255,.35); font-size: 13px; }
pre { margin: 0; padding: 14px; white-space: pre-wrap; overflow-wrap: anywhere; font: 13px/1.65 var(--mono); unicode-bidi: plaintext; }
.lyrics pre { max-height: 640px; overflow-y: auto; font-family: 'Manrope', sans-serif; font-size: 14px; }
.meter { display: flex; align-items: center; gap: 10px; padding: 0 14px 12px; flex-wrap: wrap; }
.ticks { display: flex; gap: 3px; }
.ticks span { width: 6px; height: 12px; border-radius: 2px; background: var(--line); }
.ticks .target { background: transparent; box-shadow: inset 0 0 0 1px rgba(255,122,89,.6); }
.ticks .lit { background: var(--ok); }
.ticks .hot { background: var(--hot); }
.mlabel { font: 11px var(--mono); color: var(--muted); }
.mlabel.over { color: var(--hot); }
.tweak { border-top: 1px solid var(--line); padding: 16px 20px 20px; }
.tweak .chips { justify-content: flex-start; margin-bottom: 10px; }
.refine { display: flex; gap: 8px; }
.refine input { flex: 1; min-width: 0; height: 46px; background: var(--bg); border: 1px solid var(--line); border-radius: 12px; padding: 0 14px; }
.refine input:focus { border-color: var(--violet); outline: none; }

/* drawer + modal */
.drawer { position: fixed; inset: 0 0 0 auto; width: min(420px, 100%); background: var(--card); border-left: 1px solid var(--line); z-index: 10; display: flex; flex-direction: column; box-shadow: -30px 0 80px rgba(0,0,0,.5); }
.drawer-head { display: flex; justify-content: space-between; align-items: center; padding: 18px 20px; border-bottom: 1px solid var(--line); }
.drawer-head h3 { margin: 0; font: 800 20px var(--display); }
.x { background: none; border: 0; color: var(--muted); font-size: 24px; line-height: 1; cursor: pointer; }
.hlist { overflow-y: auto; padding: 10px; display: flex; flex-direction: column; gap: 4px; }
.hrow { text-align: left; background: transparent; border: 1px solid transparent; border-radius: 12px; padding: 10px 12px; cursor: pointer; }
.hrow:hover { background: var(--card-2); border-color: var(--line); }
.hrow b { display: block; font-size: 14px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.hrow span { font: 11px var(--mono); color: var(--muted); }
.empty-hist { color: var(--muted); padding: 20px; }
.modal { position: fixed; inset: 0; z-index: 20; background: rgba(5,5,10,.72); backdrop-filter: blur(6px); overflow-y: auto; padding: 40px 16px; }
.modal-card { max-width: 1000px; margin: 0 auto; background: var(--bg); border: 1px solid var(--line); border-radius: 24px; padding: 26px 20px 30px; }
.modal-head { display: flex; justify-content: space-between; align-items: start; gap: 12px; margin-bottom: 18px; }
.modal-head h2 { font: 800 28px var(--display); margin: 0; }
.modal-head p { color: var(--muted); margin: 6px 0 0; }
.modal-foot { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; margin-top: 18px; }

/* sign-in gate */
.gate { max-width: 460px; margin: 30px auto 60px; text-align: center; }
.gate h2 { font: 800 30px var(--display); margin: 0 0 6px; }
.gate p { color: var(--muted); margin: 0 0 20px; }
#signIn { display: flex; justify-content: center; }