/* SpeechX site — calm, white-first, mobile-first. Tokens theo frontend-taste-chatgpt. */

:root {
  --bg: #ffffff;
  --surface: #fafafa;
  --border: #e5e5e5;
  --text: #111111;
  --text-2: #666666;
  --text-3: #999999;
  --accent: #111111;
  --accent-fg: #ffffff;
  --error: #cc0000;
  --radius: 12px;
  --radius-lg: 16px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  font-size: 15px;
  line-height: 1.6;
  -webkit-text-size-adjust: 100%;
}

.wrap {
  max-width: 860px;
  margin: 0 auto;
  padding-left: 16px;
  padding-right: 16px;
}

section { padding: 40px 0 8px; }

h1, h2, h3 { line-height: 1.25; font-weight: 600; }
h1 { font-size: clamp(26px, 6vw, 40px); margin: 0 0 16px; }
h2 { font-size: clamp(20px, 4vw, 26px); margin: 0 0 16px; }
h3 { font-size: 16px; margin: 0 0 8px; }

p { margin: 0 0 12px; }
a { color: inherit; }

/* Hover chỉ bật trên thiết bị thật sự hover; touch dùng :active */
@media (hover: hover) and (pointer: fine) {
  a:hover, button:hover { background-color: #f5f5f5; }
}
@media (hover: none), (pointer: coarse) {
  a:active, button:active { background-color: #f5f5f5; }
}

:where(a, button, [tabindex]):focus-visible {
  outline: 2px solid rgba(0, 0, 0, 0.22);
  outline-offset: 2px;
}

/* Top bar */
.top { border-bottom: 1px solid var(--border); }
.top-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 52px;
}
.brand { font-weight: 600; }
.top-nav { display: flex; gap: 4px; }
.top-nav a {
  text-decoration: none;
  color: var(--text-2);
  padding: 8px 12px;
  border-radius: var(--radius);
}

/* Hero */
.hero { padding-top: 56px; text-align: left; }
.hero-sub { max-width: 640px; color: var(--text-2); font-size: 17px; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 12px; margin: 24px 0 12px; }
.hero-note { color: var(--text-3); font-size: 13px; }

/* Buttons: text-only + solid cho 1 primary duy nhất */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 20px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg);
  color: var(--text);
  font: inherit;
  text-decoration: none;
  cursor: pointer;
}
.btn.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-fg);
}
.btn.primary:disabled { opacity: 0.6; cursor: default; }

/* Steps */
.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}
.steps li {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 16px;
}
.steps p { color: var(--text-2); margin: 0; }

/* Limits + privacy */
.limits ul, .privacy { margin: 0; }
.limits ul { padding-left: 20px; display: grid; gap: 8px; }
.limits li, .privacy p { color: var(--text-2); }

/* Pricing */
.pricing-note { color: var(--text-2); max-width: 640px; }
.pricing-grid {
  display: grid;
  gap: 16px;
  margin: 24px 0 12px;
}
.plan-card {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.plan-lifetime { border-color: var(--text); }
.plan-price { font-size: 32px; font-weight: 600; margin: 4px 0 0; font-variant-numeric: tabular-nums; }
.plan-billing { color: var(--text-3); margin: 0 0 8px; }
.plan-terms { color: var(--text-2); font-size: 13px; flex: 1; }
.buy-btn { width: 100%; margin-top: 12px; }
.tax-note { color: var(--text-3); font-size: 13px; }
.buy-error { color: var(--error); font-size: 14px; }

/* FAQ */
.faq dl { margin: 0; }
.faq dt { font-weight: 600; margin-top: 16px; }
.faq dd { margin: 4px 0 0; color: var(--text-2); }
.faq code {
  font-family: Consolas, monospace;
  font-size: 13px;
  background: var(--surface);
  padding: 1px 5px;
  border-radius: 6px;
}

/* Footer */
.footer {
  border-top: 1px solid var(--border);
  margin-top: 48px;
  padding-top: 24px;
  padding-bottom: 32px;
}
.footer p { color: var(--text-3); font-size: 13px; }

/* Tablet+ */
@media (min-width: 768px) {
  .wrap { padding-left: 24px; padding-right: 24px; }
  .pricing-grid { grid-template-columns: repeat(3, 1fr); }
  .steps { grid-template-columns: repeat(3, 1fr); }
  .br-desktop { display: inline; }
}

@media (max-width: 767px) {
  .br-desktop { display: none; }
  .hero { padding-top: 40px; }
}