/* ============================================================
   Public pages stylesheet (homepage, about, contact, login, terms)
   Shares the design tokens from css/styles.css, but defaults to
   DARK mode (public/marketing pages are dark-first, resend.com
   style). A saved light preference still applies via
   [data-theme="light"] — public-nav.js sets data-theme from
   localStorage before paint.
   ============================================================ */

:root {
  color-scheme: dark;

  /* Brand / accent — identical across modes (matches styles.css) */
  --primary: #4A9EFF;
  --primary-dark: #3A8EEF;
  --primary-soft: rgba(74, 158, 255, 0.10);

  --success: #2ECC71;
  --danger-soft: #FF6B6B;

  /* Surfaces (dark default) */
  --background: #1A1A2E;
  --card-background: #16213E;
  --bg-card: #16213E;
  --bg-input: #0F1729;
  --bg-muted: #0A0F1F;

  /* Text */
  --text-primary: #FFFFFF;
  --text-secondary: #AAB3C4;
  --text-muted: #888F9E;

  /* Borders */
  --border-color: #2A3656;
  --border-strong: #3A4870;

  --error-bg: rgba(255, 107, 107, 0.10);
  --error-border: rgba(255, 107, 107, 0.30);
  --error-text: #FF8A95;
  --success-bg: rgba(46, 204, 113, 0.10);
  --success-text: #6EE7B7;

  --nav-bg: rgba(26, 26, 46, 0.75);
}

[data-theme="light"] {
  color-scheme: light;

  --background: #F4F6FA;
  --card-background: #FFFFFF;
  --bg-card: #FFFFFF;
  --bg-input: #F7F9FC;
  --bg-muted: #EEF2F8;

  --text-primary: #0F1729;
  --text-secondary: #6B7785;
  --text-muted: #9AA3B0;

  --border-color: #D6DEEA;
  --border-strong: #B8C2D4;

  --error-bg: rgba(255, 71, 87, 0.10);
  --error-border: rgba(255, 71, 87, 0.30);
  --error-text: #C8313E;
  --success-bg: rgba(46, 204, 113, 0.10);
  --success-text: #1E8449;

  --nav-bg: rgba(244, 246, 250, 0.75);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
  background: var(--background);
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

main { flex: 1; }

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 16px;
  width: 100%;
}

/* ------------------------------------------------------------
   Navigation — sticky, translucent, backdrop blur
   ------------------------------------------------------------ */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--nav-bg);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
}

.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 16px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.nav-logo {
  font-size: 17px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.2px;
}
.nav-logo:hover { text-decoration: none; }

.nav-menu {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-menu a {
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  padding: 8px 12px;
  border-radius: 8px;
  transition: color 0.15s, background 0.15s;
}
.nav-menu a:hover {
  color: var(--text-primary);
  background: var(--primary-soft);
  text-decoration: none;
}

.nav-menu .nav-login {
  margin-left: 12px;
  color: var(--text-primary);
  border: 1px solid var(--border-strong);
  padding: 7px 16px;
  border-radius: 8px;
  transition: border-color 0.15s, background 0.15s;
}
.nav-menu .nav-login:hover {
  border-color: var(--primary);
  background: var(--primary-soft);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  cursor: pointer;
  padding: 8px;
  line-height: 0;
}

@media (max-width: 720px) {
  .nav-toggle { display: block; }
  .nav-menu {
    display: none;
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    background: var(--background);
    border-bottom: 1px solid var(--border-color);
    padding: 8px 16px 16px;
  }
  .nav-menu.open { display: flex; }
  .nav-menu a { padding: 12px; font-size: 16px; }
  .nav-menu .nav-login { margin-left: 0; margin-top: 8px; text-align: center; }
}

/* ------------------------------------------------------------
   Buttons
   ------------------------------------------------------------ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 24px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  border: 1px solid transparent;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}
.btn:hover { text-decoration: none; }

.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-primary:disabled { opacity: 0.6; cursor: not-allowed; }

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border-color: var(--border-strong);
}
.btn-outline:hover { border-color: var(--primary); background: var(--primary-soft); }

/* ------------------------------------------------------------
   Page sections (homepage)
   ------------------------------------------------------------ */
.hero {
  text-align: center;
  padding: 110px 16px 90px;
  position: relative;
}

/* Subtle gradient glow behind the headline, resend.com style */
.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: min(720px, 90vw);
  height: 380px;
  background: radial-gradient(ellipse at center, var(--primary-soft) 0%, transparent 70%);
  pointer-events: none;
}

.hero h1 {
  position: relative;
  font-size: 44px;
  font-weight: 800;
  letter-spacing: -1.2px;
  line-height: 1.12;
  max-width: 760px;
  margin: 0 auto 20px;
}

.hero .hero-sub {
  position: relative;
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.55;
  max-width: 560px;
  margin: 0 auto 36px;
}

.hero-ctas {
  position: relative;
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}

.section {
  padding: 80px 0;
  border-top: 1px solid var(--border-color);
}

.section-title {
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -0.8px;
  text-align: center;
  margin-bottom: 12px;
}

.section-sub {
  text-align: center;
  color: var(--text-secondary);
  font-size: 16px;
  margin-bottom: 48px;
}

/* Feature cards — thin border, subtle hover highlight */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.feature-card {
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 28px 24px;
  transition: border-color 0.15s;
}
.feature-card:hover { border-color: var(--border-strong); }

.feature-card h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 10px;
}

.feature-card p {
  font-size: 14.5px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* How it works — numbered steps */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.step {
  text-align: center;
  padding: 20px 16px;
}

.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--border-strong);
  color: var(--primary);
  font-weight: 700;
  font-size: 16px;
  margin-bottom: 16px;
}

.step p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.55;
}

/* Pricing cards */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  align-items: stretch;
}

.plan-card {
  position: relative;
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  transition: border-color 0.15s;
}
.plan-card:hover { border-color: var(--border-strong); }

.plan-name { font-size: 16px; font-weight: 600; margin-bottom: 6px; }
.plan-price { font-size: 30px; font-weight: 800; letter-spacing: -0.5px; }
.plan-price span { font-size: 15px; font-weight: 500; color: var(--text-secondary); }
.plan-trial { font-size: 13px; color: var(--success-text); margin-top: 4px; }
.plan-features {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin: 14px 0 22px;
  flex: 1;
}
.plan-card .btn { width: 100%; }

/* CTA band */
.cta-band { text-align: center; }
.cta-band h2 {
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -0.8px;
  margin-bottom: 28px;
}

@media (max-width: 860px) {
  .hero { padding: 70px 16px 60px; }
  .hero h1 { font-size: 31px; letter-spacing: -0.8px; }
  .hero .hero-sub { font-size: 15px; }
  .section { padding: 56px 0; }
  .section-title { font-size: 26px; }
  .features-grid, .steps-grid, .pricing-grid { grid-template-columns: 1fr; }
}

/* ------------------------------------------------------------
   Prose pages (about, terms)
   ------------------------------------------------------------ */
.page {
  max-width: 760px;
  margin: 0 auto;
  padding: 56px 16px 80px;
}

.page h1 {
  font-size: 36px;
  font-weight: 800;
  letter-spacing: -1px;
  margin-bottom: 8px;
}

.page .page-sub {
  color: var(--text-secondary);
  font-size: 16px;
  margin-bottom: 40px;
}

.page h2 {
  font-size: 21px;
  font-weight: 700;
  letter-spacing: -0.3px;
  margin: 44px 0 14px;
}

/* Italic lead-ins ("In Short: ...") read as asides, not body text */
.page em { color: var(--text-muted); }

.page p, .page li {
  font-size: 15.5px;
  color: var(--text-secondary);
  line-height: 1.7;
}

.page p + p { margin-top: 12px; }

.page h3 {
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -0.2px;
  margin: 26px 0 10px;
}

.page ul, .page ol {
  padding-left: 22px;
  margin: 12px 0;
}
.page li { margin-bottom: 6px; }

.page strong { color: var(--text-primary); }

.page table {
  border-collapse: collapse;
  margin: 18px 0 24px;
  display: block;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}
.page th, .page td {
  border: 1px solid var(--border-color);
  padding: 8px 10px;
  font-size: 14px;
  text-align: left;
  color: var(--text-secondary);
}
.page th { color: var(--text-primary); }

/* ------------------------------------------------------------
   Forms (contact, login)
   ------------------------------------------------------------ */
.form-group { margin-bottom: 16px; }

.form-label {
  display: block;
  color: var(--text-secondary);
  font-size: 12px;
  font-weight: 600;
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: 12px 14px;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  color: var(--text-primary);
  font-size: 16px;
  font-family: inherit;
  outline: none;
  transition: border-color 0.2s;
}
.form-input:focus, .form-select:focus, .form-textarea:focus { border-color: var(--primary); }
.form-textarea { resize: vertical; min-height: 140px; }

.alert {
  margin-top: 16px;
  padding: 12px 14px;
  border-radius: 8px;
  font-size: 14px;
}
.alert-error { background: var(--error-bg); border: 1px solid var(--error-border); color: var(--error-text); }
.alert-success { background: var(--success-bg); border: 1px solid rgba(46, 204, 113, 0.3); color: var(--success-text); }

/* ------------------------------------------------------------
   Footer
   ------------------------------------------------------------ */
.site-footer {
  border-top: 1px solid var(--border-color);
  padding: 36px 16px;
  text-align: center;
}

.footer-links {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px 24px;
  margin-bottom: 16px;
}

.footer-links a {
  color: var(--text-secondary);
  font-size: 14px;
}
.footer-links a:hover { color: var(--text-primary); }

.site-footer p {
  color: var(--text-muted);
  font-size: 13px;
  margin-top: 6px;
}
.site-footer p a { color: var(--text-muted); }
.site-footer p a:hover { color: var(--text-secondary); }