:root {
  --bg: #0b0f14;
  --panel: #141a22;
  --panel2: #0e131a;
  --border: #1f2a36;
  --muted: #7a8697;
  --text: #dbe2ea;
  --accent: #4ade80;
  --accent2: #22c55e;
  --warn: #fbbf24;
  --danger: #f87171;
  --first: #60a5fa;
  --gold: #d4af37;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; background: var(--bg); color: var(--text); font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Inter, sans-serif; }
a { color: var(--first); text-decoration: none; }
a:hover { text-decoration: underline; }
code, .mono { font-family: ui-monospace, "JetBrains Mono", Consolas, monospace; }
header.nav {
  padding: 14px 28px;
  border-bottom: 1px solid var(--border);
  background: var(--panel);
  display: flex; align-items: center; gap: 18px;
  position: sticky; top: 0; z-index: 10;
}
header.nav .brand { font-weight: 700; letter-spacing: .03em; font-size: 16px; }
header.nav .brand b { color: var(--accent); }
header.nav nav { margin-left: auto; display: flex; gap: 20px; }
header.nav nav a { color: var(--muted); font-size: 14px; }
header.nav nav a:hover { color: var(--text); text-decoration: none; }
.btn {
  display: inline-block; padding: 10px 18px;
  background: var(--accent); color: #0b0f14;
  border: none; border-radius: 6px; font-weight: 600;
  cursor: pointer; font-family: inherit; font-size: 14px;
  transition: filter 120ms;
}
.btn:hover { filter: brightness(1.1); }
.btn.ghost { background: transparent; border: 1px solid var(--border); color: var(--text); }
.btn.ghost:hover { background: var(--panel); }
.btn.gold { background: var(--gold); }
.btn.big { padding: 14px 26px; font-size: 16px; }
.btn:disabled { opacity: .5; cursor: not-allowed; }

.container { max-width: 1100px; margin: 0 auto; padding: 0 24px; }

/* Landing hero */
section.hero { padding: 80px 24px 60px; text-align: center; }
section.hero h1 { font-size: 44px; margin: 0 0 16px; letter-spacing: -0.02em; line-height: 1.1; }
section.hero h1 span.hl { color: var(--accent); }
section.hero p.lead { color: var(--muted); font-size: 18px; max-width: 680px; margin: 0 auto 28px; line-height: 1.55; }
section.hero .cta { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
section.hero .stats {
  margin-top: 40px; display: flex; gap: 32px; justify-content: center; flex-wrap: wrap; color: var(--muted); font-size: 13px;
}
section.hero .stats b { color: var(--text); font-size: 15px; }

/* Feature grid */
.features {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px; margin: 20px 0 60px;
}
.feature {
  background: var(--panel); border: 1px solid var(--border); border-radius: 8px;
  padding: 22px;
}
.feature h3 { margin: 0 0 8px; font-size: 16px; }
.feature p { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.55; }

/* Pricing grid */
section.pricing { padding: 60px 0; border-top: 1px solid var(--border); }
section.pricing h2 { font-size: 28px; text-align: center; margin: 0 0 8px; }
section.pricing p.sub { text-align: center; color: var(--muted); margin: 0 0 36px; }
.pricing-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
}
.plan {
  background: var(--panel); border: 1px solid var(--border); border-radius: 10px;
  padding: 24px; display: flex; flex-direction: column; gap: 12px;
  position: relative;
}
.plan.free { border-color: var(--accent); }
.plan.gold { border-color: var(--gold); }

/* Shared pricing-card style (landing + panel) */
.plan.pricing-card { padding: 30px 26px; transition: transform .2s, border-color .2s; }
.plan.pricing-card:hover { transform: translateY(-4px); }
.plan.pricing-card .tagline { color: var(--muted); font-size: 13px; margin: -4px 0 4px; }
.plan.pricing-card .per-month { color: var(--muted); font-size: 13px; margin: -4px 0 8px; display: flex; align-items: center; gap: 8px; }
.plan.pricing-card .save { display: inline-block; background: rgba(74, 222, 128, 0.15); color: var(--accent); padding: 2px 8px; border-radius: 4px; font-size: 10px; font-weight: 700; letter-spacing: .05em; text-transform: uppercase; }
.plan.pricing-card ul { list-style: none; padding: 0; margin: 0; }
.plan.pricing-card ul li { padding: 4px 0 4px 24px; position: relative; line-height: 1.45; }
.plan.pricing-card ul li::before { content: "✓"; color: var(--accent); font-weight: 700; position: absolute; left: 0; top: 4px; }

/* Billing-period toggle (shared) */
.bill-toggle { display: inline-flex; padding: 4px; background: var(--panel2); border: 1px solid var(--border); border-radius: 8px; gap: 2px; justify-content: center; margin: 0 auto 24px; flex-wrap: wrap; }
.bill-toggle button { background: transparent; color: var(--muted); border: none; padding: 10px 16px; cursor: pointer; border-radius: 6px; font-family: inherit; font-size: 12px; font-weight: 600; transition: all .2s; white-space: nowrap; }
.bill-toggle button.active { background: var(--panel); color: var(--text); box-shadow: 0 2px 8px rgba(0,0,0,.2); }
.bill-toggle button:hover:not(.active) { color: var(--text); }

/* ──────────────── Mobile responsiveness ──────────────── */
@media (max-width: 700px) {
  /* Nav */
  header.nav { padding: 12px 16px; gap: 12px; flex-wrap: wrap; }
  header.nav .brand { font-size: 14px; }
  header.nav nav { gap: 14px; font-size: 13px; width: 100%; margin-left: 0; justify-content: flex-end; margin-top: 2px; }

  /* Hero */
  section.hero { padding: 50px 16px 40px; }
  section.hero h1 { font-size: 30px; }
  section.hero p.lead { font-size: 15px; padding: 0 6px; }
  section.hero .cta { gap: 10px; flex-direction: column; align-items: stretch; max-width: 300px; margin: 0 auto; }
  section.hero .cta .btn { width: 100%; text-align: center; }
  section.hero .stats { gap: 18px; font-size: 12px; padding: 0 12px; }
  .btn.big { padding: 12px 20px; font-size: 14px; }

  /* Container padding */
  .container { padding: 0 16px; }

  /* Feature grid — single column */
  .features { gap: 12px; margin-bottom: 40px; }
  .feature { padding: 18px; }

  /* Pricing */
  section.pricing { padding: 40px 0; }
  section.pricing h2 { font-size: 24px; }
  section.pricing p.sub { font-size: 13px; }
  .pro-grid, .pricing-grid { grid-template-columns: 1fr !important; gap: 12px; }
  .plan.pricing-card { padding: 24px 20px; }
  .plan.pricing-card .price { font-size: 34px; }

  /* Billing toggle — stack vertically on narrow screens */
  .bill-toggle { flex-direction: column; width: 100%; max-width: 320px; }
  .bill-toggle button { width: 100%; padding: 12px 14px; }

  /* Compare table — horizontally scrollable */
  .compare { margin-top: 40px; padding-top: 28px; }
  .compare h3 { font-size: 17px; }
  .compare table { display: block; overflow-x: auto; white-space: nowrap; font-size: 12px; }
  .compare table th, .compare table td { padding: 10px 10px; }

  /* Trial card — stack */
  .trial-card { flex-direction: column; align-items: flex-start; gap: 12px; padding: 18px; }
  .trial-card .btn { width: 100%; text-align: center; }

  /* Panel dashboard */
  h1 { font-size: 22px !important; }
  .panel-grid { gap: 12px; }
  .keybar { flex-wrap: wrap; gap: 8px; padding: 10px 12px; }
  .keybar .key { font-size: 11px; flex: 1 1 100%; order: 1; }
  .keybar #emailDisplay { flex: 1 1 100%; order: 2; margin-left: 0; }
  .keybar .btn { order: 3; flex: 1; }
  .card { padding: 16px; }
  .card .big-num { font-size: 26px; }
  .chart-card { padding: 16px; }
  .chart-head { gap: 10px; }
  .chart-tabs button { padding: 5px 10px; font-size: 11px; }
  #usageChart { height: 180px !important; }

  /* Payments table */
  table { font-size: 12px; }
  table th, table td { padding: 8px 8px; }
  table { display: block; overflow-x: auto; }

  /* Footer */
  footer { padding: 20px 16px; font-size: 12px; }

  /* Modals */
  .modal { padding: 24px 20px; width: 92%; }
  .modal h3 { font-size: 16px; }
  .modal p { font-size: 13px; }
  .key-reveal { font-size: 12px; padding: 12px; }
}

@media (max-width: 420px) {
  section.hero h1 { font-size: 26px; }
  section.hero h1 br { display: none; }
  section.pricing h2 { font-size: 20px; }
  .plan.pricing-card .price { font-size: 30px; }
  .card .big-num { font-size: 22px; }
}
.plan .ribbon {
  position: absolute; top: -10px; right: 14px;
  background: var(--gold); color: #111; padding: 2px 8px; font-size: 10px; border-radius: 3px;
  text-transform: uppercase; letter-spacing: .05em;
}
.plan h3 { margin: 0; font-size: 16px; }
.plan .price { font-size: 30px; font-weight: 700; color: var(--text); }
.plan .price small { color: var(--muted); font-weight: 400; font-size: 13px; }
.plan ul { margin: 0; padding: 0; list-style: none; color: var(--muted); font-size: 13px; line-height: 1.8; }
.plan ul li::before { content: "→ "; color: var(--accent); }

/* Panel */
.panel-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px; margin: 24px 0;
}
.card {
  background: var(--panel); border: 1px solid var(--border); border-radius: 8px;
  padding: 20px;
}
.card h3 { margin: 0 0 12px; font-size: 13px; text-transform: uppercase; letter-spacing: .05em; color: var(--muted); font-weight: 600; }
.card .big-num { font-size: 32px; font-weight: 700; line-height: 1; }
.card .big-num small { font-size: 12px; color: var(--muted); font-weight: 400; margin-left: 6px; }
.card .kv { display: flex; justify-content: space-between; padding: 4px 0; font-size: 13px; }
.card .kv span { color: var(--muted); }

.keybar {
  display: flex; align-items: center; gap: 10px;
  background: var(--panel2); border: 1px solid var(--border); border-radius: 6px;
  padding: 10px 14px; margin-bottom: 20px;
}
.keybar .key { font-family: ui-monospace, Consolas, monospace; font-size: 13px; flex: 1; word-break: break-all; }
.keybar .key.masked { color: var(--muted); }

table { width: 100%; border-collapse: collapse; font-size: 13px; }
table th { text-align: left; color: var(--muted); font-weight: 600; text-transform: uppercase; letter-spacing: .05em; font-size: 11px; padding: 8px 12px; border-bottom: 1px solid var(--border); }
table td { padding: 9px 12px; border-bottom: 1px solid #131a22; }
table tr:hover td { background: #121822; }

footer {
  padding: 30px 24px; border-top: 1px solid var(--border);
  text-align: center; color: var(--muted); font-size: 13px; margin-top: 60px;
}

.flash {
  padding: 12px 16px; border-radius: 6px; margin: 16px 0; font-size: 14px;
}
.flash.ok { background: #0d2819; border: 1px solid var(--accent); color: var(--accent); }
.flash.warn { background: #2a1f0a; border: 1px solid var(--warn); color: var(--warn); }

.modal-bg {
  position: fixed; inset: 0; background: rgba(0, 0, 0, 0.7);
  display: flex; align-items: center; justify-content: center; z-index: 100;
}
.modal {
  background: var(--panel); border: 1px solid var(--border); border-radius: 10px;
  padding: 32px; max-width: 560px; width: 90%;
}
.modal h3 { margin: 0 0 12px; }
.modal p { color: var(--muted); font-size: 14px; margin: 0 0 16px; }
.key-reveal {
  background: var(--bg); border: 1px solid var(--accent); border-radius: 6px;
  padding: 14px; font-family: ui-monospace, Consolas, monospace;
  word-break: break-all; font-size: 14px; color: var(--accent);
  margin-bottom: 16px;
}