:root {
  color-scheme: dark;
  --bg: #080c14;
  --nav: #0d1421;
  --surface: #131d2d;
  --elev: #192638;
  --border: #29384b;
  --ink: #f5f8fc;
  --muted: #9baec4;
  --cyan: #19d3e6;
  --cyan-ink: #062126;
  --emerald: #17c99a;
  --amber: #f5b942;
  --danger: #ff8f8f;
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.28);
  --radius: 18px;
  --nav-w: 280px;
  --dock-w: 0px;
  --font: "Manrope", "Segoe UI", sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;
  --space: 8px;
  --focus: 0 0 0 3px rgba(25, 211, 230, 0.45);
}

html[data-lang="fa"] { --font: "Vazirmatn", "Noto Naskh Arabic", sans-serif; }
.bubble, #draft {
  font-family: "Vazirmatn", "Manrope", "Noto Naskh Arabic", "Noto Sans Devanagari", "Noto Sans SC", "Noto Sans TC", "Noto Sans JP", "Noto Sans KR", sans-serif;
}

[data-theme="light"] {
  color-scheme: light;
  --bg: #f7f9fc;
  --nav: #ffffff;
  --surface: #ffffff;
  --elev: #eef3f8;
  --border: #dfe7ef;
  --ink: #142133;
  --muted: #62758a;
  --cyan: #087f94;
  --cyan-ink: #f7f9fc;
  --emerald: #0e8f6e;
  --amber: #9a6b12;
  --danger: #a12626;
  --shadow: 0 16px 40px rgba(20, 33, 51, 0.06);
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body {
  font-family: var(--font);
  background:
    radial-gradient(ellipse at 50% -20%, rgba(25, 211, 230, 0.08), transparent 42%),
    var(--bg);
  color: var(--ink);
  line-height: 1.5;
}
button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; }
a { color: inherit; text-decoration: none; }
:focus-visible { outline: none; box-shadow: var(--focus); }
.skip {
  position: absolute; inset-inline-start: 12px; top: -40px; z-index: 9;
  background: var(--cyan); color: var(--cyan-ink); padding: 8px 12px; border-radius: 999px;
}
.skip:focus { top: 12px; }

.landing { max-width: 1080px; margin: 0 auto; padding: 22px 20px 72px; }
.topbar, .row, .stage-bar { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.topbar, .stage-bar { justify-content: space-between; }
.spread { justify-content: space-between; width: 100%; }
.center { justify-content: center; }
.brand { display: flex; }
.logo-mark, .hero-logo { background: #080c14; display: block; }
.logo-mark { height: 56px; width: auto; border-radius: 14px; padding: 4px; }
.hero { display: grid; justify-items: center; text-align: center; gap: 8px; padding: 28px 0 12px; }
.hero-logo { width: min(420px, 88vw); height: auto; border-radius: 28px; }
.hero h1 { margin: 0; font-size: clamp(1.8rem, 4vw, 3.1rem); letter-spacing: -0.03em; line-height: 1.15; max-width: 16ch; }
.kicker { margin: 8px 0 0; color: var(--cyan); font-weight: 700; letter-spacing: 0.14em; font-size: 0.78rem; }
.lede { margin: 0 0 8px; color: var(--muted); max-width: 42rem; }
.nav-links { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.preview {
  margin: 28px auto; max-width: 720px; padding: 18px; border-radius: 24px;
  background: var(--surface); border: 1px solid var(--border); box-shadow: var(--shadow);
}
.preview-bar, .preview-line, .preview-composer {
  border-radius: 999px; background: var(--elev); height: 12px; margin-bottom: 10px;
}
.preview-bar { width: 28%; background: rgba(25, 211, 230, 0.35); }
.preview-line.short { width: 62%; }
.preview-composer { height: 46px; border-radius: 16px; border: 1px solid var(--border); background: transparent; }
.card, .stat, .metric {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow);
}
.card { padding: 18px; }
.card h2, .card h3 { margin: 0 0 8px; font-size: 1.05rem; }
.card p { margin: 0; color: var(--muted); }
.price { text-align: center; }
.price h3 { color: var(--ink); }
.euro, .num { font-family: var(--mono); font-variant-numeric: tabular-nums; }
.euro { color: var(--cyan); font-size: 1.8rem; font-weight: 500; margin: 10px 0; }
.muted { color: var(--muted); }
.center-note { text-align: center; margin: 14px auto; max-width: 46rem; }
.grid-3, .grid-2, .metrics, .quick { display: grid; gap: 14px; }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-2 { grid-template-columns: 1.15fr 0.85fr; }
.metrics { grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); }
.metric { padding: 14px; }
.metric b { display: block; margin-top: 6px; font-size: 1.25rem; color: var(--cyan); }
.metric span, .metric small { color: var(--muted); }
.faq { display: grid; gap: 8px; margin-top: 28px; }
.faq h2 { margin-bottom: 4px; }
details { border: 1px solid var(--border); border-radius: 14px; padding: 10px 14px; background: var(--surface); }
summary { cursor: pointer; font-weight: 650; }
.foot { margin-top: 36px; color: var(--muted); text-align: center; }

.btn, .btn-ghost, .btn-danger, .quick button, .nav button.nav-item, .list-btn {
  border-radius: 999px; padding: 10px 14px; border: 1px solid transparent;
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
}
.btn { background: var(--cyan); color: var(--cyan-ink); font-weight: 700; }
.btn:disabled, .btn[aria-disabled="true"] { opacity: 0.45; cursor: not-allowed; }
.btn-ghost { background: transparent; border-color: var(--border); color: var(--ink); }
.btn-danger { background: transparent; color: var(--danger); border-color: var(--danger); }
.quick { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.quick button {
  text-align: start; justify-content: flex-start; width: 100%;
  background: var(--elev); border-color: var(--border); min-height: 72px; border-radius: 16px; line-height: 1.35;
}
.quick button small { display: block; color: var(--muted); font-weight: 500; }

.app { min-height: 100vh; display: grid; grid-template-columns: var(--nav-w) minmax(0, 1fr) var(--dock-w); }
.app.dock-open { --dock-w: min(440px, 38vw); }
.app.nav-collapsed { --nav-w: 76px; }
.nav, .dock { background: var(--nav); border-color: var(--border); min-height: 100vh; }
.nav { border-inline-end: 1px solid var(--border); padding: 16px 12px; display: flex; flex-direction: column; gap: 8px; }
.dock { border-inline-start: 1px solid var(--border); overflow: auto; position: relative; }
.dock:empty, .app:not(.dock-open) .dock { display: none; }
.app.dock-open .dock { display: flex; flex-direction: column; padding: 16px; gap: 12px; }
.nav-item, .list-btn {
  width: 100%; border-radius: 12px; background: transparent; color: var(--ink);
  text-align: start; justify-content: flex-start; white-space: normal;
}
.nav button[aria-current="page"], .list-btn[aria-current="true"] { background: rgba(25, 211, 230, 0.12); color: var(--cyan); }
.nav .group { color: var(--muted); font-size: 0.75rem; margin: 10px 8px 0; }
.app.nav-collapsed .nav .label, .app.nav-collapsed .nav .group, .app.nav-collapsed .recent { display: none; }
.recent { display: grid; gap: 2px; }
.stage-wrap { min-width: 0; display: flex; flex-direction: column; min-height: 100vh; }
.stage-bar { padding: 14px 18px 0; }
.stage-bar h1 { margin: 0; font-size: 1.15rem; }
#stage { padding: 12px 18px 24px; display: grid; gap: 14px; align-content: start; }
.activity { min-height: 0; margin: 8px 18px 0; }
.activity:not(:empty) { padding: 8px 12px; border-radius: 12px; background: rgba(245, 185, 66, 0.12); border: 1px solid var(--border); }
.chat-shell { display: grid; gap: 14px; min-height: calc(100vh - 120px); align-content: end; }
.welcome { text-align: center; display: grid; justify-items: center; gap: 8px; padding: 12px 0 8px; }
.welcome h2 { margin: 0; font-size: clamp(1.6rem, 3vw, 2.4rem); letter-spacing: -0.03em; }
.thread { display: flex; flex-direction: column; gap: 10px; }
.bubble { padding: 12px 14px; border-radius: 16px; white-space: pre-wrap; unicode-bidi: plaintext; max-width: 760px; }
.bubble.user { background: rgba(25, 211, 230, 0.12); margin-inline-start: auto; }
.bubble.assistant { background: var(--surface); border: 1px solid var(--border); }
.bubble .actions { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 8px; }
.composer { display: grid; gap: 10px; padding: 12px; border-radius: 22px; background: var(--surface); border: 1px solid var(--border); position: sticky; bottom: 12px; }
textarea { width: 100%; min-height: 74px; resize: vertical; border: 0; background: transparent; padding: 8px; }
input, select {
  width: 100%; border: 1px solid var(--border); background: var(--elev); border-radius: 12px; padding: 10px 12px;
}
label { display: grid; gap: 6px; font-size: 0.92rem; }
.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
.modes { display: flex; gap: 6px; flex-wrap: wrap; }
.modes button[aria-pressed="true"] { border-color: var(--cyan); color: var(--cyan); }
table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
th, td { border-bottom: 1px solid var(--border); text-align: start; padding: 8px 6px; vertical-align: top; }
th { cursor: pointer; color: var(--muted); font-weight: 600; }
.eq, code, .ltr { direction: ltr; unicode-bidi: isolate; font-family: var(--mono); white-space: pre-wrap; }
.md p { margin: 0 0 8px; }
.skeleton { height: 14px; border-radius: 999px; background: linear-gradient(90deg, var(--elev), var(--surface), var(--elev)); background-size: 200% 100%; }
html:not(.reduce-motion) .skeleton { animation: vida-shimmer 1.2s linear infinite; }
html:not(.reduce-motion) .welcome { animation: vida-in 0.45s ease; }
@keyframes vida-in { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
@keyframes vida-shimmer { from { background-position: 100% 0; } to { background-position: -100% 0; } }
.modal { position: fixed; inset: 0; background: rgba(8, 12, 20, 0.62); display: grid; place-items: center; z-index: 20; padding: 18px; }
.modal-card { width: min(560px, 100%); max-height: min(80vh, 720px); overflow: auto; background: var(--surface); border: 1px solid var(--border); border-radius: 20px; padding: 16px; box-shadow: var(--shadow); }
.lang-list, .cmd-list { display: grid; gap: 4px; margin-top: 10px; }
.lang-list button, .cmd-list button { text-align: start; background: transparent; border: 0; border-radius: 10px; padding: 10px 12px; color: var(--ink); }
.lang-list button[aria-selected="true"], .cmd-list button[aria-selected="true"], .lang-list button:hover, .cmd-list button:hover { background: var(--elev); }
.badge { border-radius: 999px; padding: 2px 8px; font-size: 0.75rem; border: 1px solid var(--border); }
.badge.ok { color: var(--emerald); }
.badge.wait { color: var(--amber); }
.hidden { display: none !important; }
.menu-toggle { display: none; }
.resize { position: absolute; inset-inline-start: -4px; top: 0; bottom: 0; width: 8px; cursor: col-resize; }
.split { display: grid; grid-template-columns: 0.9fr 1.1fr; min-height: calc(100vh - 90px); gap: 18px; }
.split-copy { display: grid; align-content: center; gap: 10px; padding: 12px; }
.nodes { display: grid; gap: 8px; }
.node { display: grid; grid-template-columns: 16px 1fr; gap: 10px; align-items: start; }
.node i { width: 10px; height: 10px; margin-top: 6px; border-radius: 99px; background: var(--cyan); display: block; }
.node.wait i { background: var(--amber); }
.node.bad i { background: var(--danger); }
.diff-up { color: var(--emerald); }
.diff-down { color: var(--amber); }

@media (max-width: 980px) {
  .grid-3, .quick, .grid-2, .split, .form-grid { grid-template-columns: 1fr; }
  .app { grid-template-columns: 1fr; }
  .menu-toggle { display: inline-flex; }
  .nav {
    position: fixed; inset-block: 0; inset-inline-start: 0; width: min(86vw, 320px); z-index: 6;
    transition: transform 0.2s ease;
  }
  html[dir="rtl"] .nav { transform: translateX(110%); }
  html[dir="ltr"] .nav { transform: translateX(-110%); }
  .nav.open { transform: none !important; }
  .app.dock-open .dock {
    position: fixed; inset-inline: 0; bottom: 0; top: auto; width: auto;
    min-height: 0; max-height: 70vh; z-index: 7;
    border-radius: 20px 20px 0 0; box-shadow: var(--shadow);
  }
  .menu-toggle { position: relative; z-index: 8; }
  .resize { display: none; }
  .app.nav-collapsed { --nav-w: 280px; }
}

html.reduce-motion *, html.reduce-motion *::before, html.reduce-motion *::after {
  animation: none !important; transition: none !important;
}