:root {
  --bg: #0a0a10;
  --bg-soft: #12121c;
  --ink: #f2f0ea;
  --ink-dim: #a7a4b8;
  --violet: #8b5cf6;
  --violet-deep: #6d3df0;
  --blue: #4f6df5;
  --glass: rgba(255, 255, 255, 0.06);
  --glass-line: rgba(255, 255, 255, 0.12);
  --danger: #f47174;
  font-size: 16px;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }
body {
  background: var(--bg);
  color: var(--ink);
  font-family: "Soehne", "Inter", system-ui, -apple-system, sans-serif;
  -webkit-font-smoothing: antialiased;
}
.serif { font-family: Georgia, "Times New Roman", serif; font-style: italic; font-weight: 500; }
.muted { color: var(--ink-dim); }
.small { font-size: 0.85rem; }
.error { color: var(--danger); margin-top: 0.75rem; font-size: 0.9rem; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; }

.page { min-height: 100dvh; display: flex; flex-direction: column; }
.center-page { align-items: center; justify-content: center; padding: 1.25rem; }

.mark { width: 2rem; height: 2rem; color: var(--violet); flex: none; }

/* floating glass pill nav */
.nav-pill {
  position: fixed; top: 0.9rem; left: 50%; transform: translateX(-50%);
  display: flex; align-items: center; gap: 1.1rem;
  padding: 0.45rem 0.55rem 0.45rem 1rem;
  background: rgba(16, 16, 26, 0.72);
  border: 1px solid var(--glass-line);
  border-radius: 999px;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  z-index: 20;
  max-width: calc(100vw - 1.5rem);
}
.nav-brand { display: flex; align-items: center; gap: 0.5rem; font-weight: 650; letter-spacing: 0.01em; }
.nav-brand .mark { width: 1.4rem; height: 1.4rem; }
.nav-links { display: flex; align-items: center; gap: 0.9rem; font-size: 0.92rem; }
.nav-links a { color: var(--ink-dim); }
.nav-links a:hover { color: var(--ink); }
.nav-cta {
  background: var(--ink); color: #10101a !important;
  padding: 0.4rem 0.95rem; border-radius: 999px; font-weight: 600;
}

/* hero */
.hero { flex: 1; display: flex; flex-direction: column; justify-content: center; padding: 7rem 1.25rem 3rem; max-width: 60rem; margin: 0 auto; width: 100%; }
.hero-kicker { color: var(--violet); font-size: 0.82rem; letter-spacing: 0.22em; text-transform: uppercase; margin-bottom: 1.1rem; }
.hero-title { font-size: clamp(2.5rem, 9vw, 5.4rem); line-height: 1.02; font-weight: 700; letter-spacing: -0.02em; }
.inline-pill {
  display: inline-flex; align-items: center; justify-content: center;
  width: 3.2rem; height: 2rem; margin-left: 0.6rem; vertical-align: middle;
  background: var(--glass); border: 1px solid var(--violet); border-radius: 999px;
}
.inline-pill .mark { width: 1.25rem; height: 1.25rem; }
.hero-sub { margin-top: 1.4rem; max-width: 34rem; color: var(--ink-dim); font-size: 1.05rem; line-height: 1.55; }
.hero-actions { display: flex; gap: 0.8rem; margin-top: 2.2rem; flex-wrap: wrap; }

.btn-primary {
  background: linear-gradient(135deg, var(--violet), var(--violet-deep));
  color: #fff; border: none; border-radius: 999px;
  padding: 0.8rem 1.7rem; font-weight: 650; font-size: 1rem;
  box-shadow: 0 6px 30px rgba(139, 92, 246, 0.35);
}
.btn-primary:disabled { opacity: 0.55; cursor: default; }
.btn-primary.full { width: 100%; margin-top: 0.9rem; }
.btn-ghost {
  background: var(--glass); color: var(--ink);
  border: 1px solid var(--glass-line); border-radius: 999px;
  padding: 0.8rem 1.5rem; font-weight: 600;
}
.btn-ghost.small { padding: 0.42rem 1rem; font-size: 0.88rem; }

/* footer with glow wordmark */
.footer { position: relative; overflow: hidden; text-align: center; padding: 3rem 0 0.5rem; }
.footer::before {
  content: ""; position: absolute; left: 50%; bottom: -9rem; transform: translateX(-50%);
  width: 42rem; height: 16rem; max-width: 120vw;
  background: radial-gradient(ellipse at center, rgba(139,92,246,0.5), rgba(79,109,245,0.28) 45%, transparent 70%);
  filter: blur(30px); pointer-events: none;
}
.footer-word {
  position: relative; font-size: clamp(4rem, 17vw, 11rem); font-weight: 800;
  letter-spacing: -0.03em; line-height: 0.95;
  background: linear-gradient(180deg, var(--ink), rgba(242,240,234,0.18));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.footer-row { position: relative; display: flex; gap: 0.7rem; justify-content: center; color: var(--ink-dim); font-size: 0.85rem; padding: 1rem 0 1.4rem; }

/* auth card */
.card {
  width: 100%; max-width: 24rem;
  background: var(--bg-soft); border: 1px solid var(--glass-line);
  border-radius: 1.4rem; padding: 2rem 1.6rem;
  display: flex; flex-direction: column; align-items: center; text-align: center;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.45);
}
.auth-card .mark { width: 2.6rem; height: 2.6rem; margin-bottom: 0.9rem; }
.auth-card h2 { font-size: 1.45rem; margin-bottom: 0.2rem; }
.steps { text-align: left; margin: 1.1rem 0 0.5rem; padding-left: 1.2rem; color: var(--ink); font-size: 0.95rem; }
.challenge {
  font-size: 1.7rem; font-weight: 750; letter-spacing: 0.18em;
  background: var(--glass); border: 1px solid var(--glass-line);
  border-radius: 0.8rem; padding: 0.65rem 0; width: 100%; margin: 0.4rem 0 0.9rem;
  font-variant-numeric: tabular-nums;
}
.otp-input {
  width: 100%; margin-top: 0.5rem;
  background: var(--glass); border: 1px solid var(--glass-line);
  border-radius: 0.8rem; color: var(--ink);
  font-size: 1.3rem; letter-spacing: 0.3em; text-align: center;
  padding: 0.7rem; outline: none;
}
.otp-input:focus { border-color: var(--violet); }

/* chat */
.chat-page { height: 100dvh; overflow: hidden; }
.chat-top {
  display: flex; align-items: center; justify-content: space-between;
  padding: 0.8rem 1rem; border-bottom: 1px solid var(--glass-line);
  background: rgba(10, 10, 16, 0.85); backdrop-filter: blur(10px);
}
.chat-brand { display: flex; align-items: center; gap: 0.5rem; font-weight: 650; }
.chat-brand .mark { width: 1.5rem; height: 1.5rem; }
.chat-scroll { flex: 1; overflow-y: auto; padding: 1.2rem 1rem 1rem; display: flex; flex-direction: column; gap: 0.9rem; }
.chat-empty { margin: auto; text-align: center; color: var(--ink-dim); display: flex; flex-direction: column; align-items: center; gap: 0.8rem; }
.chat-empty .mark { width: 3rem; height: 3rem; }
.bubble { max-width: min(42rem, 92%); }
.bubble.me { align-self: flex-end; }
.bubble.ai { align-self: flex-start; }
.bubble-role { font-size: 0.72rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--ink-dim); margin-bottom: 0.3rem; }
.bubble.me .bubble-role { text-align: right; }
.bubble-text {
  background: var(--glass); border: 1px solid var(--glass-line);
  border-radius: 1.1rem; padding: 0.75rem 1rem;
  line-height: 1.55; white-space: pre-wrap; word-break: break-word;
}
.bubble.me .bubble-text { background: rgba(139, 92, 246, 0.16); border-color: rgba(139, 92, 246, 0.35); }
.typing { display: flex; gap: 0.3rem; padding: 0.4rem 0.2rem; }
.typing span { width: 0.45rem; height: 0.45rem; border-radius: 50%; background: var(--violet); animation: blink 1.2s infinite; }
.typing span:nth-child(2) { animation-delay: 0.2s; }
.typing span:nth-child(3) { animation-delay: 0.4s; }
@keyframes blink { 0%, 80%, 100% { opacity: 0.25; } 40% { opacity: 1; } }

.composer {
  display: flex; gap: 0.6rem; padding: 0.8rem 1rem calc(0.8rem + env(safe-area-inset-bottom));
  border-top: 1px solid var(--glass-line); background: rgba(10, 10, 16, 0.9);
}
.composer textarea {
  flex: 1; resize: none; max-height: 8rem;
  background: var(--glass); border: 1px solid var(--glass-line);
  border-radius: 1rem; color: var(--ink);
  font: inherit; padding: 0.75rem 1rem; outline: none;
}
.composer textarea:focus { border-color: var(--violet); }
.btn-primary.send { padding: 0.75rem 1.4rem; align-self: flex-end; }

@media (prefers-reduced-motion: reduce) {
  .typing span { animation: none; }
}

/* small screens: keep the pill nav on one line */
.nav-pill, .nav-brand, .nav-links, .nav-links a, .nav-cta { white-space: nowrap; }
@media (max-width: 480px) {
  .nav-pill { gap: 0.7rem; padding: 0.4rem 0.5rem 0.4rem 0.8rem; }
  .nav-links { gap: 0.6rem; font-size: 0.88rem; }
  .nav-cta { padding: 0.35rem 0.8rem; }
}

/* markdown rendering */
.md-p { margin: 0 0 0.55rem; }
.md-p:last-child { margin-bottom: 0; }
.md-ul { margin: 0.2rem 0 0.55rem; padding-left: 1.2rem; }
.md-ul li { margin: 0.15rem 0; }
.md-pre { background: rgba(0,0,0,0.35); border: 1px solid var(--glass-line); border-radius: 0.6rem; padding: 0.7rem 0.85rem; overflow-x: auto; font-size: 0.86rem; margin: 0.4rem 0 0.55rem; }
.inline-code { background: rgba(0,0,0,0.35); border-radius: 0.3rem; padding: 0.05rem 0.35rem; font-size: 0.88em; }

/* error text must never overflow or show raw dumps */
.error { word-break: break-word; overflow-wrap: anywhere; max-width: 100%; }