:root {
  --ink: #0A0F1A;
  --panel: #121A2C;
  --panel-edge: #223049;
  --text: #E7ECF3;
  --text-dim: #8C9AB3;
  --signal: #2DD4BF;
  --signal-dim: #1B8577;
  --danger: #E5697A;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--ink);
  color: var(--text);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  line-height: 1.5;
}

h1, h2, h3 {
  font-family: 'Space Grotesk', 'Inter', sans-serif;
  font-weight: 600;
  margin: 0 0 12px;
  letter-spacing: -0.01em;
}

a { color: var(--signal); text-decoration: none; }
a:hover { text-decoration: underline; }
p { color: var(--text-dim); }
.muted { color: var(--text-dim); font-size: 14px; }
.muted.small { font-size: 12px; }

/* ---- nav ---- */
.site-nav {
  display: flex; align-items: center; justify-content: space-between;
  padding: 20px 40px;
  border-bottom: 1px solid var(--panel-edge);
}
.brand { font-family: 'Space Grotesk', sans-serif; font-weight: 700; font-size: 20px; color: var(--text); letter-spacing: 0.02em; }
.brand span { color: var(--signal); }
.site-nav nav { display: flex; align-items: center; gap: 20px; }
.site-nav nav a { color: var(--text-dim); font-size: 14px; font-weight: 500; }
.site-nav nav a:hover { color: var(--text); text-decoration: none; }
.nav-btn {
  background: var(--signal); color: #06251F !important; padding: 8px 16px; border-radius: 6px;
  font-weight: 600 !important;
}
.nav-btn:hover { background: #45E0CC; text-decoration: none !important; }

main { max-width: 1080px; margin: 0 auto; padding: 0 40px; }

/* ---- buttons ---- */
.btn {
  display: inline-block; padding: 12px 22px; border-radius: 6px; font-weight: 600; font-size: 14px;
  border: 1px solid transparent; cursor: pointer;
}
.btn:hover { text-decoration: none; }
.btn-primary { background: var(--signal); color: #06251F; }
.btn-primary:hover { background: #45E0CC; }
.btn-ghost { background: transparent; color: var(--text); border-color: var(--panel-edge); }
.btn-ghost:hover { border-color: var(--signal); color: var(--signal); }
.btn-block { width: 100%; }
.btn-small { padding: 6px 12px; font-size: 12px; }

/* ---- hero ---- */
.hero {
  display: grid; grid-template-columns: 1.2fr 1fr; gap: 60px; align-items: center;
  padding: 80px 0 60px;
}
.eyebrow { color: var(--signal); font-size: 13px; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; margin: 0 0 14px; }
.hero h1 { font-size: 44px; line-height: 1.12; color: var(--text); }
.hero-sub { font-size: 16px; max-width: 46ch; margin: 18px 0 30px; }
.hero-cta { display: flex; gap: 14px; flex-wrap: wrap; }

.signal-panel {
  background: var(--panel); border: 1px solid var(--panel-edge); border-radius: 10px;
  padding: 26px; font-family: 'IBM Plex Mono', monospace; font-size: 13px;
}
.signal-row { display: flex; align-items: center; gap: 10px; color: var(--text-dim); padding: 10px 0; letter-spacing: 0.03em; }
.signal-row-final { color: var(--text); }
.signal-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--panel-edge); flex-shrink: 0; }
.signal-dot-live { background: var(--signal); box-shadow: 0 0 8px var(--signal); }
.signal-arrow { color: var(--panel-edge); padding-left: 3px; }

/* ---- how it works ---- */
.how { padding: 40px 0 70px; }
.how h2 { font-size: 28px; margin-bottom: 30px; }
.how-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.how-card { background: var(--panel); border: 1px solid var(--panel-edge); border-radius: 10px; padding: 26px; }
.how-index { color: var(--signal); font-family: 'IBM Plex Mono', monospace; font-size: 12px; letter-spacing: 0.06em; }
.how-card h3 { margin-top: 10px; font-size: 18px; }
.how-card p { font-size: 14px; margin: 0; }

/* ---- pricing ---- */
.pricing { padding: 30px 0 90px; text-align: center; }
.pricing h2 { font-size: 28px; }
.pricing-sub { max-width: 50ch; margin: 0 auto 36px; }
.plan-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; text-align: left; }
.plan-card { background: var(--panel); border: 1px solid var(--panel-edge); border-radius: 10px; padding: 28px; }
.plan-card-highlight { border-color: var(--signal); }
.plan-card h3 { font-size: 18px; }
.plan-price { font-family: 'Space Grotesk', sans-serif; font-size: 32px; font-weight: 700; margin: 8px 0 18px; }
.plan-price span { font-size: 14px; color: var(--text-dim); font-weight: 500; }
.plan-card ul { list-style: none; padding: 0; margin: 0 0 24px; }
.plan-card li { color: var(--text-dim); font-size: 14px; padding: 6px 0; border-bottom: 1px solid var(--panel-edge); }
.plan-card li:last-child { border-bottom: none; }

/* ---- auth pages ---- */
.auth-wrap { display: flex; justify-content: center; padding: 70px 0; }
.auth-card { background: var(--panel); border: 1px solid var(--panel-edge); border-radius: 10px; padding: 36px; width: 380px; }
.auth-sub { font-size: 14px; margin-top: -4px; }
.auth-card label { display: block; font-size: 13px; color: var(--text-dim); margin: 16px 0 6px; }
.auth-card input {
  width: 100%; background: var(--ink); border: 1px solid var(--panel-edge); border-radius: 6px;
  padding: 10px 12px; color: var(--text); font-size: 14px; font-family: inherit;
}
.auth-card input:focus { outline: 2px solid var(--signal); outline-offset: 1px; border-color: var(--signal); }
.auth-card .btn { margin-top: 22px; }
.auth-switch { font-size: 13px; margin-top: 18px; text-align: center; }
.form-error {
  background: rgba(229, 105, 122, 0.12); border: 1px solid var(--danger); color: #F3B4BE;
  border-radius: 6px; padding: 10px 14px; font-size: 13px; margin-top: 14px;
}

/* ---- dashboard ---- */
.dash { padding: 50px 0 80px; }
.dash-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 30px; }
.dash-head h1 { font-size: 26px; margin: 4px 0 0; }
.dash-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; margin-bottom: 22px; }
.dash-card { background: var(--panel); border: 1px solid var(--panel-edge); border-radius: 10px; padding: 24px; }
.dash-card h3 { font-size: 16px; margin-bottom: 14px; }
.dash-empty { text-align: center; padding: 40px 24px; }
.limit-list { list-style: none; padding: 0; margin: 0; }
.limit-list li { font-size: 14px; color: var(--text-dim); padding: 6px 0; }
.limit-list strong { color: var(--text); font-family: 'Space Grotesk', sans-serif; }
.key-display {
  display: block; background: var(--ink); border: 1px solid var(--panel-edge); border-radius: 6px;
  padding: 12px 14px; font-family: 'IBM Plex Mono', monospace; font-size: 13px; color: var(--signal);
  word-break: break-all; margin-bottom: 14px;
}

/* ---- help ---- */
.help { padding: 50px 0 80px; max-width: 640px; }
.help-block { margin-bottom: 28px; }
.help-block h3 { font-size: 17px; }
.help-block p { font-size: 14px; margin: 0; }

/* ---- admin ---- */
.admin { padding: 50px 0 80px; }
.admin-table { width: 100%; border-collapse: collapse; margin-top: 20px; }
.admin-table th {
  text-align: left; font-size: 12px; text-transform: uppercase; letter-spacing: 0.05em;
  color: var(--text-dim); border-bottom: 1px solid var(--panel-edge); padding: 10px 12px;
}
.admin-table td { padding: 10px 12px; border-bottom: 1px solid var(--panel-edge); font-size: 14px; }
.admin-table select {
  background: var(--ink); color: var(--text); border: 1px solid var(--panel-edge); border-radius: 6px; padding: 6px 8px;
}
.inline-form { display: inline; }
.mono { font-family: 'IBM Plex Mono', monospace; }
.tag {
  background: var(--signal-dim); color: var(--signal); font-size: 11px; padding: 2px 7px;
  border-radius: 4px; margin-left: 6px; text-transform: uppercase; letter-spacing: 0.04em;
}

/* ---- footer ---- */
.site-foot {
  border-top: 1px solid var(--panel-edge); margin-top: 40px; padding: 24px 40px;
  color: var(--text-dim); font-size: 13px;
}

/* ---- mobile ---- */
@media (max-width: 860px) {
  .hero { grid-template-columns: 1fr; padding: 50px 0 40px; }
  .hero h1 { font-size: 32px; }
  .how-grid, .plan-grid, .dash-grid { grid-template-columns: 1fr; }
  main { padding: 0 20px; }
  .site-nav { padding: 16px 20px; flex-wrap: wrap; gap: 12px; }
}

/* ---- accessibility ---- */
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible {
  outline: 2px solid var(--signal); outline-offset: 2px;
}
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}