:root {
  --bg: #0b0f1a; --bg2: #111827; --card: #151d2e; --border: #24304a;
  --text: #e6eaf2; --muted: #93a0b4; --accent: #6366f1; --accent2: #22d3ee;
  --ok: #34d399; --warn: #fbbf24; --err: #f87171;
  --radius: 12px; --shadow: 0 8px 30px rgba(0,0,0,.35);
}
[data-theme="light"] {
  --bg: #f7f8fb; --bg2: #ffffff; --card: #ffffff; --border: #e2e6ef;
  --text: #101828; --muted: #5a6a80; --shadow: 0 8px 30px rgba(16,24,40,.08);
}
* { box-sizing: border-box; margin: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Inter, sans-serif;
  background: var(--bg); color: var(--text); line-height: 1.6; min-height: 100vh;
}
a { color: var(--accent2); text-decoration: none; }
a:hover { text-decoration: underline; }
.container { max-width: 1100px; margin: 0 auto; padding: 0 20px; }
nav {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 20px; max-width: 1100px; margin: 0 auto;
}
.logo { font-weight: 800; font-size: 1.2rem; color: var(--text); }
.logo span { color: var(--accent); }
.nav-links { display: flex; gap: 18px; align-items: center; }
.btn {
  display: inline-block; padding: 10px 20px; border-radius: 10px; border: 1px solid var(--border);
  background: var(--card); color: var(--text); font-weight: 600; cursor: pointer; font-size: .95rem;
  transition: transform .1s, box-shadow .2s;
}
.btn:hover { transform: translateY(-1px); text-decoration: none; }
.btn.primary { background: linear-gradient(135deg, var(--accent), #8b5cf6); border: none; color: #fff; }
.btn.small { padding: 6px 12px; font-size: .85rem; }
.btn.danger { color: var(--err); }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.theme-toggle { background: none; border: 1px solid var(--border); border-radius: 8px; color: var(--text); padding: 6px 10px; cursor: pointer; }

.hero { text-align: center; padding: 80px 20px 60px; }
.hero h1 { font-size: clamp(2rem, 5vw, 3.4rem); line-height: 1.15; font-weight: 800; }
.hero h1 em { font-style: normal; background: linear-gradient(90deg, var(--accent), var(--accent2)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero p.sub { max-width: 640px; margin: 20px auto; color: var(--muted); font-size: 1.15rem; }
.hero .cta-row { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; margin-top: 28px; }
.badge { display: inline-block; padding: 4px 12px; border: 1px solid var(--border); border-radius: 999px; color: var(--muted); font-size: .8rem; margin-bottom: 18px; }

.section { padding: 60px 0; }
.section h2 { text-align: center; font-size: 2rem; margin-bottom: 12px; }
.section p.lead { text-align: center; color: var(--muted); max-width: 620px; margin: 0 auto 40px; }
.grid { display: grid; gap: 20px; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.card {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 24px; box-shadow: var(--shadow);
}
.card h3 { margin-bottom: 8px; font-size: 1.1rem; }
.card p { color: var(--muted); font-size: .95rem; }
.step-num { width: 34px; height: 34px; border-radius: 50%; background: var(--accent); color: #fff; display: flex; align-items: center; justify-content: center; font-weight: 700; margin-bottom: 14px; }

.pricing-grid { display: grid; gap: 24px; grid-template-columns: repeat(auto-fit, minmax(270px, 1fr)); max-width: 760px; margin: 0 auto; }
.price { font-size: 2.2rem; font-weight: 800; margin: 10px 0 2px; }
.price small { font-size: 1rem; color: var(--muted); font-weight: 400; }
.plan-features { list-style: none; padding: 0; margin: 18px 0; }
.plan-features li { padding: 6px 0; color: var(--muted); font-size: .95rem; }
.plan-features li::before { content: "✓  "; color: var(--ok); font-weight: 700; }
.popular { border-color: var(--accent); position: relative; }
.popular::before { content: "MOST POPULAR"; position: absolute; top: -11px; left: 50%; transform: translateX(-50%); background: var(--accent); color: #fff; font-size: .7rem; font-weight: 700; padding: 3px 12px; border-radius: 999px; }

footer { border-top: 1px solid var(--border); padding: 30px 20px; text-align: center; color: var(--muted); font-size: .9rem; margin-top: 40px; }
footer .links { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; margin-bottom: 10px; }

/* ---------- app ---------- */
.app-shell { max-width: 1100px; margin: 0 auto; padding: 0 20px 60px; }
.topbar { display: flex; align-items: center; justify-content: space-between; padding: 14px 0; border-bottom: 1px solid var(--border); margin-bottom: 24px; flex-wrap: wrap; gap: 10px; }
.topbar .right { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.pill { padding: 3px 10px; border-radius: 999px; font-size: .75rem; font-weight: 700; border: 1px solid var(--border); color: var(--muted); }
.pill.pro { background: var(--accent); color: #fff; border: none; }
.pill.ok { color: var(--ok); border-color: var(--ok); }
.pill.warn { color: var(--warn); border-color: var(--warn); }
.pill.err { color: var(--err); border-color: var(--err); }
.pill.run { color: var(--accent2); border-color: var(--accent2); }

.auth-box { max-width: 400px; margin: 60px auto; }
.auth-box h2 { margin-bottom: 18px; text-align: center; }
input, textarea, select {
  width: 100%; padding: 11px 14px; border-radius: 10px; border: 1px solid var(--border);
  background: var(--bg2); color: var(--text); font-size: .95rem; font-family: inherit; margin-bottom: 12px;
}
input:focus, textarea:focus { outline: 2px solid var(--accent); border-color: transparent; }
label { font-size: .85rem; color: var(--muted); display: block; margin-bottom: 4px; }
.error-msg { color: var(--err); font-size: .9rem; margin: 8px 0; min-height: 1.2em; }
.muted { color: var(--muted); font-size: .9rem; }

.proj-grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); }
.proj-card { cursor: pointer; transition: border-color .15s; }
.proj-card:hover { border-color: var(--accent); }

.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--border); margin: 18px 0 22px; overflow-x: auto; }
.tab { padding: 10px 18px; cursor: pointer; color: var(--muted); font-weight: 600; border-bottom: 2px solid transparent; white-space: nowrap; background: none; border-top: none; border-left: none; border-right: none; font-size: .95rem; font-family: inherit; }
.tab.active { color: var(--text); border-bottom-color: var(--accent); }

.doc-row { display: flex; align-items: center; justify-content: space-between; padding: 12px 16px; border: 1px solid var(--border); border-radius: 10px; margin-bottom: 10px; background: var(--card); gap: 10px; flex-wrap: wrap; }
.md-view { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; overflow-x: auto; }
.md-view h1 { font-size: 1.5rem; margin: 18px 0 10px; }
.md-view h2 { font-size: 1.25rem; margin: 18px 0 8px; border-bottom: 1px solid var(--border); padding-bottom: 6px; }
.md-view h3 { font-size: 1.05rem; margin: 16px 0 6px; color: var(--accent2); }
.md-view ul, .md-view ol { padding-left: 22px; margin: 8px 0; }
.md-view code { background: var(--bg); border: 1px solid var(--border); border-radius: 5px; padding: 1px 6px; font-size: .85em; }
.md-view pre { background: var(--bg); border: 1px solid var(--border); border-radius: 8px; padding: 14px; overflow-x: auto; margin: 10px 0; }
.md-view pre code { border: none; background: none; padding: 0; }
.md-view table { border-collapse: collapse; margin: 10px 0; width: 100%; font-size: .9rem; }
.md-view th, .md-view td { border: 1px solid var(--border); padding: 6px 10px; text-align: left; }
.md-view p { margin: 8px 0; }

.chat-box { display: flex; flex-direction: column; height: 65vh; background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); }
.chat-msgs { flex: 1; overflow-y: auto; padding: 20px; display: flex; flex-direction: column; gap: 14px; }
.msg { max-width: 82%; padding: 12px 16px; border-radius: 14px; font-size: .95rem; white-space: pre-wrap; word-break: break-word; }
.msg.user { align-self: flex-end; background: var(--accent); color: #fff; border-bottom-right-radius: 4px; }
.msg.assistant { align-self: flex-start; background: var(--bg2); border: 1px solid var(--border); border-bottom-left-radius: 4px; }
.chat-input { display: flex; gap: 10px; padding: 14px; border-top: 1px solid var(--border); }
.chat-input textarea { flex: 1; margin: 0; resize: none; height: 52px; }

.run-row { display: flex; align-items: center; gap: 12px; justify-content: space-between; padding: 14px 16px; border: 1px solid var(--border); border-radius: 10px; margin-bottom: 10px; background: var(--card); cursor: pointer; flex-wrap: wrap; }
.run-row:hover { border-color: var(--accent); }
.spinner { display: inline-block; width: 16px; height: 16px; border: 2px solid var(--border); border-top-color: var(--accent); border-radius: 50%; animation: spin .8s linear infinite; vertical-align: middle; }
@keyframes spin { to { transform: rotate(360deg); } }

.modal-bg { position: fixed; inset: 0; background: rgba(0,0,0,.6); display: flex; align-items: center; justify-content: center; z-index: 50; padding: 20px; }
.modal { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 28px; max-width: 460px; width: 100%; }
.hidden { display: none !important; }
.row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.spread { justify-content: space-between; }
.mt { margin-top: 16px; } .mb { margin-bottom: 16px; }
.stat-row { display: flex; gap: 14px; flex-wrap: wrap; margin: 14px 0; }
.stat { background: var(--card); border: 1px solid var(--border); border-radius: 10px; padding: 10px 18px; text-align: center; }
.stat b { display: block; font-size: 1.3rem; }
.stat span { color: var(--muted); font-size: .78rem; }
@media (max-width: 640px) {
  .hero { padding: 50px 16px 40px; }
  .msg { max-width: 94%; }
  .nav-links .hide-mobile { display: none; }
}