/* cheaptalk.ai landing — night sky */

:root {
  --bg: #0a0b10;
  --ink: #e6e7ec;
  --ink-dim: #9a9daa;
  --ink-faint: #5c5f6b;
  --accent: #8b8ff0;
  --accent-soft: rgba(139, 143, 240, 0.14);
  --line: rgba(255, 255, 255, 0.08);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  background: radial-gradient(ellipse 120% 80% at 50% -20%, #12142033 0%, transparent 60%), var(--bg);
  color: var(--ink);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.65;
  min-height: 100vh;
  overflow-x: hidden;
}

#sky {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

header, main, footer { position: relative; z-index: 2; }

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 26px clamp(20px, 6vw, 72px);
}

.brand { font-size: 21px; font-weight: 600; letter-spacing: -0.02em; }
.brand span { color: var(--accent); font-weight: 400; }

header nav { display: flex; align-items: center; gap: 26px; }
header nav a {
  color: var(--ink-dim);
  text-decoration: none;
  font-size: 14.5px;
  transition: color 0.15s;
}
header nav a:hover { color: var(--ink); }

.btn-outline {
  background: none;
  border: 1px solid var(--line);
  border-radius: 10px;
  color: var(--ink);
  font: inherit;
  font-size: 14px;
  padding: 7px 18px;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
}
.btn-outline:hover { border-color: var(--accent); background: var(--accent-soft); }

.btn-primary {
  background: var(--accent);
  border: none;
  border-radius: 12px;
  color: #0a0b10;
  font: inherit;
  font-size: 15.5px;
  font-weight: 600;
  padding: 13px 28px;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.2s, filter 0.2s;
  box-shadow: 0 0 0 rgba(139, 143, 240, 0);
}
.btn-primary:hover {
  filter: brightness(1.08);
  transform: translateY(-1px);
  box-shadow: 0 6px 30px rgba(139, 143, 240, 0.35);
}
.wide { width: 100%; }

.btn-ghost {
  background: none;
  border: none;
  color: var(--ink-faint);
  font: inherit;
  font-size: 13.5px;
  cursor: pointer;
  padding: 10px;
}
.btn-ghost:hover { color: var(--ink-dim); }

/* ---------- hero ---------- */

.hero {
  max-width: 780px;
  margin: 0 auto;
  padding: clamp(70px, 14vh, 150px) 24px 80px;
  text-align: center;
}

.hero h1 {
  font-size: clamp(40px, 7vw, 68px);
  font-weight: 650;
  letter-spacing: -0.03em;
  line-height: 1.08;
  background: linear-gradient(180deg, #f2f2f7 30%, #a8abd8 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.sub {
  margin: 26px auto 0;
  max-width: 560px;
  color: var(--ink-dim);
  font-size: 17.5px;
}
.sub strong { color: var(--ink); font-weight: 600; }
.sub em { color: var(--accent); font-style: normal; }

.cta-row {
  margin-top: 40px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}
.cta-note { font-size: 13px; color: var(--ink-faint); letter-spacing: 0.02em; }

/* ---------- features ---------- */

.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 18px;
  max-width: 960px;
  margin: 0 auto;
  padding: 20px 24px 90px;
}

.card {
  background: rgba(20, 22, 28, 0.72);
  backdrop-filter: blur(6px);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 28px 26px;
  transition: border-color 0.25s, transform 0.25s;
}
.card:hover { border-color: rgba(139, 143, 240, 0.35); transform: translateY(-3px); }
.card .glyph { font-size: 22px; color: var(--accent); margin-bottom: 12px; }
.card h3 { font-size: 16.5px; margin-bottom: 8px; font-weight: 600; }
.card p { font-size: 14px; color: var(--ink-dim); }

/* ---------- pricing ---------- */

.pricing { display: flex; justify-content: center; padding: 0 24px 100px; }

.price-card {
  width: min(400px, 100%);
  background: rgba(20, 22, 28, 0.8);
  backdrop-filter: blur(6px);
  border: 1px solid rgba(139, 143, 240, 0.3);
  border-radius: 22px;
  padding: 36px 34px;
  box-shadow: 0 0 80px rgba(139, 143, 240, 0.08);
}
.price-head { color: var(--accent); font-size: 14px; letter-spacing: 0.08em; text-transform: uppercase; }
.price { margin: 10px 0 20px; color: var(--ink-dim); font-size: 18px; }
.price span { font-size: 52px; font-weight: 650; color: var(--ink); letter-spacing: -0.02em; }
.price-card ul { list-style: none; margin-bottom: 28px; }
.price-card li { padding: 7px 0; font-size: 14.5px; color: var(--ink-dim); }
.price-card li::before { content: "✦ "; color: var(--accent); font-size: 11px; }

/* ---------- privacy ---------- */

.privacy {
  max-width: 640px;
  margin: 0 auto;
  padding: 0 24px 110px;
  text-align: center;
}
.privacy h2 { font-size: 26px; font-weight: 600; letter-spacing: -0.02em; margin-bottom: 16px; }
.privacy p { color: var(--ink-dim); font-size: 15px; }

footer {
  display: flex;
  justify-content: space-between;
  padding: 22px clamp(20px, 6vw, 72px) 30px;
  font-size: 13px;
  color: var(--ink-faint);
  border-top: 1px solid var(--line);
}

/* ---------- auth modal ---------- */

.modal {
  position: fixed;
  inset: 0;
  z-index: 20;
  background: rgba(5, 6, 10, 0.7);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
}
.modal.hidden { display: none; }

.modal-card {
  position: relative;
  width: min(400px, 92vw);
  background: #14161c;
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 30px;
}

.modal-x {
  position: absolute;
  top: 14px;
  right: 18px;
  background: none;
  border: none;
  color: var(--ink-faint);
  font-size: 22px;
  cursor: pointer;
}
.modal-x:hover { color: var(--ink); }

.tabs {
  display: flex;
  gap: 6px;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 4px;
  margin-bottom: 22px;
}
.tab {
  flex: 1;
  background: none;
  border: none;
  border-radius: 9px;
  color: var(--ink-faint);
  font: inherit;
  font-size: 14px;
  padding: 8px;
  cursor: pointer;
}
.tab.active { background: var(--accent-soft); color: var(--accent); }

.modal-card label {
  display: block;
  font-size: 13px;
  color: var(--ink-dim);
  margin-bottom: 16px;
}
.modal-card input {
  display: block;
  width: 100%;
  margin-top: 6px;
  padding: 11px 14px;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 10px;
  color: var(--ink);
  font: inherit;
  font-size: 15px;
  outline: none;
  transition: border-color 0.2s;
}
.modal-card input:focus { border-color: rgba(139, 143, 240, 0.5); }

#auth-code { letter-spacing: 0.5em; text-align: center; font-size: 20px; }

.form-note { font-size: 12.5px; color: var(--ink-faint); margin: -6px 0 10px; }

.modal-card h2 { font-size: 18px; font-weight: 600; margin-bottom: 18px; }

.code-hint { font-size: 14px; color: var(--ink-dim); margin-bottom: 18px; }
.code-hint strong { color: var(--ink); }

.form-error { color: #e07a7a; font-size: 13px; min-height: 20px; margin-bottom: 8px; }

.hidden { display: none; }

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}