/* ZerdeSoft — warm paper, deep ink, saffron accent. */
:root {
  --paper: #f5efe3;
  --paper-2: #ece4d3;
  --card: #fffdf8;
  --ink: #1b2330;
  --ink-2: #4a5160;
  --ink-3: #7c8190;
  --line: #ded4c0;
  --accent: #d9661f;
  --accent-ink: #ffffff;
  --accent-soft: #f7dcc6;
  --teal: #1f6f6a;
  --teal-soft: #d4e8e3;
  --deep: #18202c;          /* dark slabs (output panel, API) */
  --deep-2: #222c3b;
  --deep-line: #333f52;
  --deep-ink: #eef0f3;
  --deep-ink-2: #a8b0bf;
  --danger: #b3261e;
  --radius: 18px;
  --radius-s: 10px;
  --shadow: 0 1px 0 rgba(27,35,48,.04), 0 12px 32px -18px rgba(27,35,48,.25);
  --f-display: "Unbounded", "Inter", system-ui, sans-serif;
  --f-body: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --f-mono: "JetBrains Mono", ui-monospace, monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #12161d; --paper-2: #181d26; --card: #1b212b;
    --ink: #eceae4; --ink-2: #b9bcc4; --ink-3: #868b97; --line: #2c3442;
    --accent: #f08a3e; --accent-soft: #3a2618; --teal: #5cc0b5; --teal-soft: #173230;
    --deep: #0c0f14; --deep-2: #161b23; --deep-line: #2a3240;
    --shadow: 0 12px 32px -18px rgba(0,0,0,.6);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --paper: #12161d; --paper-2: #181d26; --card: #1b212b;
  --ink: #eceae4; --ink-2: #b9bcc4; --ink-3: #868b97; --line: #2c3442;
  --accent: #f08a3e; --accent-soft: #3a2618; --teal: #5cc0b5; --teal-soft: #173230;
  --deep: #0c0f14; --deep-2: #161b23; --deep-line: #2a3240;
  --shadow: 0 12px 32px -18px rgba(0,0,0,.6);
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
  margin: 0; background: var(--paper); color: var(--ink);
  font: 16px/1.6 var(--f-body); -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img, svg, canvas { display: block; max-width: 100%; }
a { color: inherit; }
button, input, select, textarea { font: inherit; color: inherit; }
[hidden] { display: none !important; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 6px; }

.wrap { width: min(1180px, 100%); margin: 0 auto; padding: 0 24px; }
@media (max-width: 640px) { .wrap { padding: 0 16px; } }

.skip { position: absolute; left: -999px; top: 8px; background: var(--ink); color: var(--paper); padding: 8px 14px; border-radius: 8px; z-index: 100; }
.skip:focus { left: 8px; }

/* ---------- header ---------- */
.top {
  position: sticky; top: 0; z-index: 30;
  background: color-mix(in srgb, var(--paper) 86%, transparent);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid color-mix(in srgb, var(--line) 60%, transparent);
}
.top__in { display: flex; align-items: center; gap: 24px; height: 68px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; font: 500 19px var(--f-display); letter-spacing: -.01em; }
.brand b { color: var(--accent); font-weight: 700; }
.brand__mark { width: 32px; height: 32px; color: var(--ink); }
.nav { display: flex; gap: 28px; margin-left: auto; }
.nav a { text-decoration: none; color: var(--ink-2); font-weight: 500; font-size: 15px; }
.nav a:hover { color: var(--ink); }
.top__tools { display: flex; align-items: center; gap: 10px; }
.langs { display: flex; border: 1px solid var(--line); border-radius: 999px; padding: 3px; }
.langs button { border: 0; background: none; padding: 4px 10px; border-radius: 999px; font-size: 12px; font-weight: 600; letter-spacing: .04em; color: var(--ink-3); cursor: pointer; }
.langs button[aria-pressed="true"] { background: var(--ink); color: var(--paper); }
.iconbtn { width: 36px; height: 36px; display: grid; place-items: center; border: 1px solid var(--line); border-radius: 50%; background: none; cursor: pointer; }
.iconbtn svg { width: 18px; height: 18px; }
@media (max-width: 860px) { .nav { display: none; } .top__tools { margin-left: auto; } }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  min-height: 48px; padding: 0 24px; border-radius: 999px; border: 1px solid transparent;
  font-weight: 600; font-size: 15px; text-decoration: none; cursor: pointer;
  transition: transform .15s, background .15s, opacity .15s;
}
.btn:active { transform: translateY(1px); }
.btn--primary { background: var(--accent); color: var(--accent-ink); }
.btn--primary:hover { background: color-mix(in srgb, var(--accent) 88%, #000); }
.btn--ghost { border-color: var(--ink); color: var(--ink); background: transparent; }
.btn--ghost:hover { background: var(--ink); color: var(--paper); }
.btn--wide { width: 100%; }
.btn[disabled] { opacity: .45; cursor: not-allowed; }
.btn.is-busy { pointer-events: none; }
.btn.is-busy::before {
  content: ""; width: 16px; height: 16px; border-radius: 50%;
  border: 2px solid currentColor; border-right-color: transparent; animation: spin .8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.linkbtn { background: none; border: 0; color: inherit; opacity: .7; cursor: pointer; font-size: 14px; text-decoration: underline; text-underline-offset: 3px; }
.linkbtn:hover { opacity: 1; }

/* ---------- hero ---------- */
.hero { padding: 72px 0 88px; position: relative; overflow: hidden; }
.hero::before { /* faint ornament, like a stamped pattern on felt */
  content: ""; position: absolute; inset: auto -120px -220px auto; width: 560px; height: 560px;
  background: radial-gradient(circle, var(--accent-soft) 0 38%, transparent 39%);
  opacity: .55; pointer-events: none;
}
.hero__in { display: grid; grid-template-columns: 1.15fr .85fr; gap: 56px; align-items: center; position: relative; }
.eyebrow { font: 600 12px var(--f-body); letter-spacing: .14em; text-transform: uppercase; color: var(--teal); margin: 0 0 18px; }
h1 { font: 700 clamp(38px, 6vw, 72px)/1.04 var(--f-display); letter-spacing: -.03em; margin: 0 0 24px; }
h1 em { font-style: normal; color: var(--accent); }
.lead { font-size: 18px; color: var(--ink-2); max-width: 560px; margin: 0 0 32px; }
.hero__cta { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 44px; }
.facts { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: 0; border-top: 1px solid var(--line); }
.facts li { flex: 1 1 140px; padding: 16px 16px 0 0; display: flex; flex-direction: column; }
.facts b { font: 700 24px var(--f-display); letter-spacing: -.02em; }
.facts span { font-size: 13px; color: var(--ink-3); }

.hero__demo { display: flex; flex-direction: column; align-items: center; text-align: center; }
.orb { position: relative; width: min(400px, 100%); aspect-ratio: 1; }
.orb canvas { width: 100%; height: 100%; }
.orb__play {
  position: absolute; inset: 0; margin: auto; width: 88px; height: 88px; border-radius: 50%;
  border: 0; background: var(--ink); color: var(--paper); display: grid; place-items: center; cursor: pointer;
  box-shadow: 0 16px 40px -12px rgba(0,0,0,.45); transition: transform .2s;
}
.orb__play:hover { transform: scale(1.06); }
.orb__play svg { width: 32px; height: 32px; margin-left: 4px; }
.orb__play.is-playing svg { margin-left: 0; }
.orb__quote { font: 500 18px/1.4 var(--f-display); margin: 8px 0 4px; max-width: 360px; }
.orb__hint { font-size: 13px; color: var(--ink-3); margin: 0; }
@media (max-width: 900px) {
  .hero { padding: 40px 0 56px; }
  .hero__in { grid-template-columns: 1fr; gap: 32px; }
  .orb { width: min(300px, 80vw); }
}

/* ---------- section heads ---------- */
section { padding: 88px 0; }
@media (max-width: 640px) { section { padding: 56px 0; } }
.sechead { display: flex; gap: 20px; align-items: flex-start; margin-bottom: 36px; }
.secnum { font: 500 13px var(--f-mono); color: var(--accent); border: 1px solid currentColor; border-radius: 999px; padding: 3px 10px; margin-top: 10px; display: inline-block; }
h2 { font: 700 clamp(28px, 4vw, 42px)/1.1 var(--f-display); letter-spacing: -.02em; margin: 0 0 8px; }
.sechead p { margin: 0; color: var(--ink-2); }

/* ---------- studio ---------- */
.studio { background: var(--paper-2); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.tabs { display: flex; gap: 8px; margin-bottom: 20px; overflow-x: auto; scrollbar-width: none; }
.tab {
  display: flex; align-items: center; gap: 10px; padding: 12px 18px; border-radius: 14px;
  border: 1px solid var(--line); background: var(--card); cursor: pointer; font-weight: 600; white-space: nowrap;
  color: var(--ink-2);
}
.tab__ico { font: 500 12px var(--f-mono); color: var(--ink-3); }
.tab[aria-selected="true"] { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.tab[aria-selected="true"] .tab__ico { color: var(--accent); }

.bench { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr); gap: 20px; align-items: start; }
@media (max-width: 960px) { .bench { grid-template-columns: 1fr; } }
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; box-shadow: var(--shadow); }
@media (max-width: 640px) { .card { padding: 18px; } }
.card--ink { background: var(--deep); color: var(--deep-ink); border-color: var(--deep); }

.field { margin-bottom: 20px; }
.field__row { display: flex; justify-content: space-between; align-items: baseline; gap: 8px; }
.field label, .label { display: block; font-weight: 600; font-size: 14px; margin-bottom: 8px; }
.counter { font: 12px var(--f-mono); color: var(--ink-3); }
.counter.is-over { color: var(--danger); }
textarea, select {
  width: 100%; border: 1px solid var(--line); border-radius: var(--radius-s);
  background: var(--paper); padding: 12px 14px; resize: vertical; font-size: 16px;
}
textarea { line-height: 1.55; min-height: 110px; }
select { appearance: none; padding-right: 36px; background-image: linear-gradient(45deg, transparent 50%, var(--ink-3) 50%), linear-gradient(135deg, var(--ink-3) 50%, transparent 50%); background-position: calc(100% - 18px) 50%, calc(100% - 13px) 50%; background-size: 5px 5px; background-repeat: no-repeat; }
textarea:focus, select:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 520px) { .grid2 { grid-template-columns: 1fr; } }
input[type="range"] { width: 100%; accent-color: var(--accent); margin-top: 12px; }

.chips { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 10px; }
.chip { border: 1px dashed var(--line); background: none; border-radius: 999px; padding: 4px 12px; font-size: 13px; color: var(--ink-2); cursor: pointer; }
.chip:hover { border-color: var(--accent); color: var(--accent); }

.voices { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 8px; }
.voice {
  position: relative; display: flex; align-items: center; gap: 10px; padding: 10px 12px;
  border: 1px solid var(--line); border-radius: 12px; background: var(--paper); cursor: pointer; text-align: left;
}
.voice[aria-checked="true"] { border-color: var(--accent); box-shadow: inset 0 0 0 1px var(--accent); background: var(--accent-soft); }
.voice__av { width: 34px; height: 34px; flex: none; border-radius: 50%; display: grid; place-items: center; font: 700 14px var(--f-display); color: #fff; }
.voice__meta { min-width: 0; display: flex; flex-direction: column; line-height: 1.25; }
.voice__name { font-weight: 600; font-size: 14px; }
.voice__tag { font-size: 12px; color: var(--ink-3); }
.voice__pv { margin-left: auto; width: 28px; height: 28px; flex: none; border-radius: 50%; border: 1px solid var(--line); background: var(--card); display: grid; place-items: center; cursor: pointer; }
.voice__pv svg { width: 12px; height: 12px; }
.voice__pv.is-busy svg { animation: spin .8s linear infinite; }

.drop {
  border: 2px dashed var(--line); border-radius: var(--radius); padding: 28px 16px; text-align: center; cursor: pointer;
  background: var(--paper); transition: border-color .15s, background .15s;
}
.drop:hover, .drop.is-over { border-color: var(--accent); background: var(--accent-soft); }
.drop__ico { width: 44px; height: 44px; margin: 0 auto 8px; border-radius: 50%; background: var(--card); display: grid; place-items: center; color: var(--accent); }
.drop__ico svg { width: 22px; height: 22px; }
.drop__title { font-weight: 600; margin: 0; }
.drop__hint { font-size: 13px; color: var(--ink-3); margin: 4px 0 0; }
.drop__file { font: 13px var(--f-mono); color: var(--teal); margin: 8px 0 0; word-break: break-all; }
.drop__file:empty { display: none; }
.or { display: flex; align-items: center; gap: 12px; color: var(--ink-3); font-size: 13px; margin: 16px 0; }
.or::before, .or::after { content: ""; flex: 1; height: 1px; background: var(--line); }

.rec { display: flex; align-items: center; gap: 14px; padding: 12px; border: 1px solid var(--line); border-radius: 14px; background: var(--paper); margin-bottom: 20px; }
.recbtn { width: 52px; height: 52px; flex: none; border-radius: 50%; border: 0; background: var(--ink); display: grid; place-items: center; cursor: pointer; }
.recbtn__dot { width: 18px; height: 18px; border-radius: 50%; background: #e5484d; transition: border-radius .2s, width .2s, height .2s; }
.rec.is-recording .recbtn__dot { border-radius: 4px; width: 16px; height: 16px; }
.rec.is-recording .recbtn { animation: pulse 1.4s ease-out infinite; }
@keyframes pulse { 0% { box-shadow: 0 0 0 0 rgba(229,72,77,.5); } 100% { box-shadow: 0 0 0 16px rgba(229,72,77,0); } }
.rec__info { display: flex; flex-direction: column; line-height: 1.3; }
.rec__label { font-weight: 600; font-size: 14px; }
.rec__time { font: 13px var(--f-mono); color: var(--ink-3); }
.rec__meter { margin-left: auto; width: 120px; height: 32px; color: var(--accent); }
@media (max-width: 420px) { .rec__meter { width: 70px; } }

.steps { list-style: none; margin: 0; padding: 0; }
.steps > li { display: flex; gap: 14px; padding-bottom: 20px; position: relative; }
.steps > li:not(:last-child)::before { content: ""; position: absolute; left: 15px; top: 34px; bottom: 4px; width: 2px; background: var(--line); }
.steps__n { width: 32px; height: 32px; flex: none; border-radius: 50%; background: var(--teal); color: #fff; display: grid; place-items: center; font: 700 14px var(--f-display); position: relative; }
.steps__body { flex: 1; min-width: 0; }
.steps__t { font-weight: 600; margin: 4px 0 4px; display: block; }
.steps__d { font-size: 14px; color: var(--ink-2); margin: 0 0 8px; }
.readme { margin: 0 0 12px; padding: 14px 16px; border-left: 3px solid var(--accent); background: var(--accent-soft); border-radius: 0 10px 10px 0; font: 500 16px/1.5 var(--f-display); }
.filelink { font-size: 14px; color: var(--teal); cursor: pointer; text-decoration: underline; text-underline-offset: 3px; display: inline-block; margin-top: -8px; }
.consent { display: flex; gap: 10px; align-items: flex-start; font-size: 14px; color: var(--ink-2); margin: 6px 0 14px; cursor: pointer; }
.consent input { margin-top: 4px; accent-color: var(--accent); }

/* ---------- output ---------- */
.out { position: sticky; top: 88px; min-height: 420px; display: flex; flex-direction: column; }
@media (max-width: 960px) { .out { position: static; min-height: 0; } }
.out__head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; }
.out__head h3 { font: 500 16px var(--f-display); margin: 0; }
.out__list { display: flex; flex-direction: column; gap: 12px; max-height: 640px; overflow-y: auto; }
.out__empty { margin: auto; text-align: center; color: var(--deep-ink-2); padding: 40px 12px; }
.out__empty svg { width: 140px; margin: 0 auto 12px; color: var(--accent); opacity: .8; }
.out__empty p { margin: 0; font-size: 14px; }

.item { background: var(--deep-2); border: 1px solid var(--deep-line); border-radius: 14px; padding: 14px; animation: rise .3s ease-out; }
@keyframes rise { from { opacity: 0; transform: translateY(6px); } }
.item__top { display: flex; align-items: center; gap: 8px; margin-bottom: 10px; font-size: 12px; color: var(--deep-ink-2); }
.item__kind { font: 600 11px var(--f-mono); letter-spacing: .06em; text-transform: uppercase; color: var(--accent); }
.item__top time { margin-left: auto; font-family: var(--f-mono); }
.item__text { font-size: 14px; line-height: 1.55; margin: 0 0 10px; color: var(--deep-ink); white-space: pre-wrap; word-break: break-word; }
.item__text--muted { color: var(--deep-ink-2); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.item__note { font-size: 12px; color: var(--deep-ink-2); margin: 0 0 10px; }
.item__note b { color: var(--deep-ink); font-weight: 500; }
.item__actions { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 10px; }
.mini { border: 1px solid var(--deep-line); background: none; color: var(--deep-ink); border-radius: 999px; padding: 4px 12px; font-size: 12px; cursor: pointer; text-decoration: none; }
.mini:hover { border-color: var(--accent); color: var(--accent); }
.item--loading .item__text::after { content: "▍"; animation: blink 1s steps(1) infinite; color: var(--accent); }
@keyframes blink { 50% { opacity: 0; } }
.item--error { border-color: color-mix(in srgb, var(--danger) 60%, var(--deep-line)); }
.item--error .item__text { color: #ffb4ab; }

.player { display: flex; align-items: center; gap: 10px; }
.player__btn { width: 36px; height: 36px; flex: none; border-radius: 50%; border: 0; background: var(--accent); color: #fff; display: grid; place-items: center; cursor: pointer; }
.player__btn svg { width: 14px; height: 14px; }
.player__wave { flex: 1; height: 36px; cursor: pointer; min-width: 0; }
.player__time { font: 11px var(--f-mono); color: var(--deep-ink-2); min-width: 38px; text-align: right; }

.segs { list-style: none; padding: 0; margin: 0 0 4px; max-height: 220px; overflow-y: auto; border-top: 1px solid var(--deep-line); }
.segs li { display: flex; gap: 10px; padding: 6px 0; border-bottom: 1px solid var(--deep-line); font-size: 13px; cursor: pointer; }
.segs li:hover { color: var(--accent); }
.segs time { font: 11px var(--f-mono); color: var(--accent); padding-top: 2px; flex: none; }

/* ---------- uses ---------- */
.usegrid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
@media (max-width: 960px) { .usegrid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .usegrid { grid-template-columns: 1fr; } }
.use { border-top: 3px solid var(--ink); padding: 20px 4px 0; }
.use__k { display: inline-grid; place-items: center; width: 40px; height: 40px; border-radius: 12px; background: var(--teal-soft); color: var(--teal); font-size: 20px; margin-bottom: 14px; }
.use h3 { font: 500 17px/1.3 var(--f-display); margin: 0 0 8px; }
.use p { margin: 0; color: var(--ink-2); font-size: 15px; }
.pipe { margin-top: 56px; display: grid; grid-template-columns: repeat(3, 1fr); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.pipe__step { padding: 22px; display: flex; gap: 14px; align-items: flex-start; font-size: 15px; color: var(--ink-2); }
.pipe__step + .pipe__step { border-left: 1px solid var(--line); }
.pipe__step b { font: 700 22px var(--f-display); color: var(--accent); line-height: 1; }
@media (max-width: 760px) { .pipe { grid-template-columns: 1fr; } .pipe__step + .pipe__step { border-left: 0; border-top: 1px solid var(--line); } }

/* ---------- api ---------- */
.api { background: var(--deep); color: var(--deep-ink); }
.api__in { display: grid; grid-template-columns: .9fr 1.1fr; gap: 48px; align-items: center; }
@media (max-width: 960px) { .api__in { grid-template-columns: 1fr; } }
.sechead--inv p { color: var(--deep-ink-2); }
.ticks { list-style: none; padding: 0; margin: 0 0 32px; }
.ticks li { padding: 10px 0 10px 30px; border-bottom: 1px solid var(--deep-line); position: relative; font-size: 15px; }
.ticks li::before { content: ""; position: absolute; left: 4px; top: 17px; width: 12px; height: 7px; border-left: 2px solid var(--accent); border-bottom: 2px solid var(--accent); transform: rotate(-45deg); }
.code { background: var(--deep-2); border: 1px solid var(--deep-line); border-radius: var(--radius); overflow: hidden; min-width: 0; }
.code__tabs { display: flex; gap: 2px; padding: 8px; border-bottom: 1px solid var(--deep-line); }
.code__tabs button { background: none; border: 0; color: var(--deep-ink-2); padding: 6px 12px; border-radius: 8px; font: 500 13px var(--f-mono); cursor: pointer; }
.code__tabs button[aria-selected="true"] { background: var(--deep-line); color: var(--deep-ink); }
.code__copy { margin-left: auto; font-family: var(--f-body) !important; }
.code pre { margin: 0; padding: 20px; overflow-x: auto; font: 13px/1.7 var(--f-mono); color: var(--deep-ink); }
.code .c { color: #7f8aa0; }
.code .k { color: #f0a46b; }
.code .s { color: #8fd4c8; }

/* ---------- contact / footer ---------- */
.contact__in { display: flex; justify-content: space-between; align-items: flex-end; gap: 32px; flex-wrap: wrap; }
.contact h2 { margin-top: 16px; }
.contact p { color: var(--ink-2); max-width: 560px; margin: 0; }
.foot { border-top: 1px solid var(--line); padding: 24px 0; font-size: 13px; color: var(--ink-3); }
.foot__in { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }

/* ---------- toasts ---------- */
.toasts { position: fixed; left: 50%; bottom: 24px; transform: translateX(-50%); display: flex; flex-direction: column; gap: 8px; z-index: 50; width: min(440px, calc(100% - 32px)); }
.toast { background: var(--ink); color: var(--paper); padding: 12px 16px; border-radius: 12px; font-size: 14px; box-shadow: 0 12px 30px -10px rgba(0,0,0,.4); animation: rise .25s ease-out; }
.toast--err { background: var(--danger); color: #fff; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
}