/* ChitNotes — marketing site
   Palette matches the ChitNotes mobile app's real theme (see mobile/lib/theme.dart)
   so the website and product feel like one brand. */

:root {
  --primary: #0f6b5c;
  --primary-strong: #0a4f44;
  --primary-tint: #e3efe9;
  --gold: #b8862e;
  --gold-tint: #f3e7cf;
  --success: #2f8f5b;
  --success-tint: #e4f2e9;
  --warning: #b8661c;
  --warning-tint: #f5e6d6;
  --critical: #b3412c;
  --paper: #f5f6f0;
  --surface: #fdfdfb;
  --muted: #6e7a72;
  --border: #e2e5dc;
  --ink: #14231d;

  --font-display: "Sora", system-ui, -apple-system, sans-serif;
  --font-body: "Inter", system-ui, -apple-system, sans-serif;

  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --shadow-card: 0 1px 2px rgba(20, 35, 29, 0.04), 0 8px 24px rgba(20, 35, 29, 0.06);
  --container: 1160px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.6;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  color: var(--ink);
  line-height: 1.2;
  margin: 0 0 0.5em;
  text-wrap: balance;
}

h1 { font-size: clamp(2rem, 4vw + 1rem, 3.25rem); font-weight: 700; letter-spacing: -0.01em; }
h2 { font-size: clamp(1.6rem, 2.4vw + 1rem, 2.25rem); font-weight: 700; }
h3 { font-size: 1.2rem; font-weight: 700; }

p { margin: 0 0 1em; color: var(--ink); }
a { color: var(--primary-strong); text-decoration: none; }
a:hover { text-decoration: underline; }

img, svg { max-width: 100%; display: block; }

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

/* Skip link for keyboard/screen-reader users */
.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--primary-strong);
  color: #fff;
  padding: 10px 16px;
  border-radius: 0 0 8px 0;
  z-index: 100;
}
.skip-link:focus { left: 0; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 24px;
  border-radius: 999px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.95rem;
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
  text-decoration: none;
  line-height: 1;
}
.btn:hover { text-decoration: none; }
.btn:focus-visible { outline: 2px solid var(--primary-strong); outline-offset: 3px; }

.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-strong); transform: translateY(-1px); }

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

.btn-ghost-light { background: rgba(255,255,255,0.12); color: #fff; border-color: rgba(255,255,255,0.35); }
.btn-ghost-light:hover { background: rgba(255,255,255,0.2); }

.btn-block { width: 100%; }
.btn-lg { padding: 15px 30px; font-size: 1rem; }

/* ---------- Header / Nav ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(253, 253, 251, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 24px;
  gap: 20px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--ink);
}
.brand:hover { text-decoration: none; }
.brand-mark {
  width: 36px; height: 36px;
  border-radius: 10px;
  background: var(--primary-tint);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.brand-mark svg { width: 20px; height: 20px; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
  margin: 0; padding: 0;
  font-size: 0.94rem;
  font-weight: 500;
}
.nav-links a { color: var(--ink); }
.nav-links a.active { color: var(--primary-strong); font-weight: 700; }
.nav-actions { display: flex; align-items: center; gap: 10px; }
.nav-links .mobile-actions { display: none; }

.nav-toggle {
  display: none;
  background: none;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  width: 42px; height: 42px;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}
.nav-toggle svg { width: 20px; height: 20px; }

@media (max-width: 880px) {
  .nav-links {
    position: fixed;
    inset: 66px 0 0 0;
    background: var(--surface);
    flex-direction: column;
    align-items: flex-start;
    padding: 24px;
    gap: 20px;
    font-size: 1.05rem;
    transform: translateY(-8px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.18s ease, transform 0.18s ease;
    overflow-y: auto;
  }
  .nav-links.open { opacity: 1; transform: translateY(0); pointer-events: auto; }
  .nav-actions { display: none; }
  .nav-links .mobile-actions { display: flex; flex-direction: column; gap: 10px; width: 100%; margin-top: 8px; }
  .nav-toggle { display: flex; }
}

/* ---------- Hero ---------- */
.hero {
  padding: 72px 0 64px;
  background: linear-gradient(180deg, var(--primary-tint) 0%, var(--paper) 100%);
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}
@media (max-width: 900px) { .hero-grid { grid-template-columns: 1fr; } }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 6px 14px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--primary-strong);
  margin-bottom: 18px;
}
.eyebrow .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--gold); }

.hero-actions { display: flex; gap: 12px; margin-top: 28px; flex-wrap: wrap; }
.hero-note { margin-top: 16px; font-size: 0.88rem; color: var(--muted); }

.hero-art {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  padding: 22px;
}
.hero-art .app-row { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; }
.hero-stat {
  background: var(--paper);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  margin-bottom: 10px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.hero-stat .label { font-size: 0.8rem; color: var(--muted); font-weight: 600; text-transform: uppercase; letter-spacing: 0.03em; }
.hero-stat .value { font-size: 1.05rem; font-weight: 700; }
.hero-stat.gold .value { color: var(--gold); }

/* ---------- Sections ---------- */
.section { padding: 72px 0; }
.section-alt { background: var(--surface); }
.section-head { max-width: 640px; margin: 0 auto 44px; text-align: center; }
.section-head p { color: var(--muted); font-size: 1.05rem; }
.section-head.left { margin: 0 0 40px; text-align: left; }

/* ---------- Feature / Card grids ---------- */
.grid { display: grid; gap: 20px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
@media (max-width: 900px) { .grid-3 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .grid-3, .grid-2 { grid-template-columns: 1fr; } }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 26px;
}
.feature-card .icon {
  width: 46px; height: 46px;
  border-radius: 12px;
  background: var(--primary-tint);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 16px;
}
.feature-card .icon svg { width: 22px; height: 22px; color: var(--primary-strong); }
.feature-card h3 { margin-bottom: 8px; }
.feature-card p { color: var(--muted); margin-bottom: 0; font-size: 0.95rem; }

/* ---------- Steps (How it works) ---------- */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; counter-reset: step; }
@media (max-width: 900px) { .steps { grid-template-columns: 1fr; } }
.step { position: relative; padding-left: 0; }
.step .step-num {
  width: 38px; height: 38px;
  border-radius: 50%;
  background: var(--ink);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-display);
  font-weight: 700;
  margin-bottom: 14px;
}
.step h3 { margin-bottom: 6px; }
.step p { color: var(--muted); font-size: 0.95rem; }

/* ---------- Pricing ---------- */
.pricing-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; max-width: 780px; margin: 0 auto; }
@media (max-width: 720px) { .pricing-grid { grid-template-columns: 1fr; } }
.price-card {
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  position: relative;
}
.price-card.highlight { border-color: var(--gold); box-shadow: 0 4px 30px rgba(184, 134, 46, 0.14); }
.price-card .badge {
  position: absolute; top: -13px; left: 28px;
  background: var(--gold); color: #fff;
  font-size: 0.75rem; font-weight: 700;
  padding: 4px 12px; border-radius: 999px;
  letter-spacing: 0.02em;
}
.price-card .plan-name { font-weight: 700; font-size: 0.95rem; color: var(--muted); text-transform: uppercase; letter-spacing: 0.04em; margin-bottom: 10px; }
.price-card .plan-price { display: flex; align-items: baseline; gap: 6px; margin-bottom: 4px; }
.price-card .plan-price .amount { font-family: var(--font-display); font-size: 2.6rem; font-weight: 700; }
.price-card .plan-price .period { color: var(--muted); font-size: 0.95rem; }
.price-card .plan-validity { color: var(--muted); font-size: 0.9rem; margin-bottom: 22px; }
.price-list { list-style: none; margin: 0 0 26px; padding: 0; display: flex; flex-direction: column; gap: 11px; }
.price-list li { display: flex; gap: 10px; align-items: flex-start; font-size: 0.93rem; }
.price-list svg { flex-shrink: 0; width: 18px; height: 18px; color: var(--success); margin-top: 2px; }
.pricing-footnote { text-align: center; color: var(--muted); font-size: 0.9rem; max-width: 620px; margin: 28px auto 0; }

/* ---------- Trust / security band ---------- */
.trust-band {
  background: var(--ink);
  color: #eef1ee;
  border-radius: var(--radius-lg);
  padding: 44px 36px;
}
.trust-band h2, .trust-band h3 { color: #fff; }
.trust-band p { color: rgba(238,241,238,0.75); }
.trust-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; margin-top: 28px; }
@media (max-width: 900px) { .trust-grid { grid-template-columns: 1fr; } }
.trust-item .icon { width: 40px; height: 40px; border-radius: 10px; background: rgba(255,255,255,0.08); display:flex; align-items:center; justify-content:center; margin-bottom: 12px; }
.trust-item .icon svg { width: 20px; height: 20px; color: var(--gold); }
.trust-item h3 { font-size: 1.02rem; margin-bottom: 6px; }
.trust-item p { font-size: 0.9rem; margin-bottom: 0; }

/* ---------- FAQ accordion ---------- */
.faq-list { max-width: 760px; margin: 0 auto; display: flex; flex-direction: column; gap: 10px; }
.faq-item { border: 1px solid var(--border); border-radius: var(--radius-md); background: var(--surface); overflow: hidden; }
.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  background: none;
  border: none;
  text-align: left;
  padding: 18px 20px;
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 600;
  color: var(--ink);
  cursor: pointer;
}
.faq-question .chev { flex-shrink: 0; width: 18px; height: 18px; transition: transform 0.2s ease; color: var(--muted); }
.faq-item[open] .faq-question .chev { transform: rotate(180deg); }
.faq-answer { padding: 0 20px 20px; color: var(--muted); font-size: 0.95rem; }
.faq-item summary::-webkit-details-marker { display: none; }

/* ---------- CTA band ---------- */
.cta-band {
  background: var(--primary);
  border-radius: var(--radius-lg);
  padding: 48px 36px;
  text-align: center;
  color: #fff;
}
.cta-band h2 { color: #fff; }
.cta-band p { color: rgba(255,255,255,0.85); max-width: 560px; margin: 0 auto 24px; }
.cta-actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

/* ---------- Contact / support ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; }
@media (max-width: 860px) { .contact-grid { grid-template-columns: 1fr; } }
.contact-item { display: flex; gap: 14px; padding: 18px 0; border-bottom: 1px solid var(--border); }
.contact-item:last-child { border-bottom: none; }
.contact-item .icon { width: 40px; height: 40px; border-radius: 10px; background: var(--primary-tint); display:flex; align-items:center; justify-content:center; flex-shrink:0; }
.contact-item .icon svg { width: 19px; height: 19px; color: var(--primary-strong); }
.contact-item h3 { margin-bottom: 4px; font-size: 1rem; }
.contact-item p { margin-bottom: 0; color: var(--muted); font-size: 0.94rem; }
.placeholder-note { color: var(--warning); font-weight: 600; }

.form-field { margin-bottom: 16px; display: flex; flex-direction: column; gap: 6px; }
.form-field label { font-size: 0.85rem; font-weight: 700; color: var(--muted); letter-spacing: 0.02em; text-transform: uppercase; }
.form-field input, .form-field textarea, .form-field select {
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  font-family: var(--font-body);
  font-size: 0.97rem;
  background: var(--surface);
  color: var(--ink);
}
.form-field input:focus, .form-field textarea:focus, .form-field select:focus {
  outline: none;
  border-color: var(--primary);
}
.form-note { font-size: 0.85rem; color: var(--muted); margin-top: 10px; }

/* ---------- Legal / policy pages ---------- */
.legal-header { background: var(--surface); border-bottom: 1px solid var(--border); padding: 56px 0 40px; }
.legal-updated { color: var(--muted); font-size: 0.9rem; }
.legal-body { padding: 48px 0 72px; }
.legal-layout { display: grid; grid-template-columns: 240px 1fr; gap: 48px; align-items: start; }
@media (max-width: 860px) { .legal-layout { grid-template-columns: 1fr; } }
.legal-toc {
  position: sticky; top: 96px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--surface);
  padding: 18px;
  font-size: 0.9rem;
}
.legal-toc h4 { font-size: 0.82rem; text-transform: uppercase; letter-spacing: 0.04em; color: var(--muted); margin-bottom: 10px; }
.legal-toc ol { margin: 0; padding-left: 18px; display: flex; flex-direction: column; gap: 8px; }
.legal-content h2 { margin-top: 2.2em; padding-top: 0.2em; scroll-margin-top: 96px; }
.legal-content h2:first-child { margin-top: 0; }
.legal-content p, .legal-content li { color: var(--ink); font-size: 0.98rem; }
.legal-content ul, .legal-content ol { padding-left: 22px; }
.callout {
  background: var(--gold-tint);
  border: 1px solid var(--gold);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  font-size: 0.93rem;
  margin: 20px 0;
}
.callout strong { color: var(--warning); }

/* ---------- About page ---------- */
.about-hero { display: grid; grid-template-columns: 1fr 1fr; gap: 44px; align-items: center; }
@media (max-width: 860px) { .about-hero { grid-template-columns: 1fr; } }
.value-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
@media (max-width: 640px) { .value-grid { grid-template-columns: 1fr; } }

/* ---------- Footer ---------- */
.site-footer { background: var(--ink); color: #dfe6e1; padding: 56px 0 28px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 32px; }
@media (max-width: 780px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 480px) { .footer-grid { grid-template-columns: 1fr; } }
.footer-brand { display: flex; align-items: center; gap: 10px; font-family: var(--font-display); font-weight: 700; font-size: 1.1rem; color: #fff; margin-bottom: 10px; }
.footer-brand-mark { width: 32px; height: 32px; border-radius: 9px; background: rgba(255,255,255,0.1); display:flex; align-items:center; justify-content:center; }
.footer-brand-mark svg { width: 17px; height: 17px; color: var(--gold); }
.footer-tagline { color: rgba(223,230,225,0.65); font-size: 0.9rem; max-width: 280px; }
.footer-col h4 { color: #fff; font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.04em; margin-bottom: 14px; }
.footer-col ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 10px; font-size: 0.92rem; }
.footer-col a { color: rgba(223,230,225,0.8); }
.footer-col a:hover { color: #fff; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  margin-top: 40px;
  padding-top: 22px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.85rem;
  color: rgba(223,230,225,0.55);
}

/* ---------- Utility ---------- */
.text-muted { color: var(--muted); }
.mt-0 { margin-top: 0; }
.center { text-align: center; }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 0.94rem; }
th, td { text-align: left; padding: 10px 14px; border-bottom: 1px solid var(--border); }
th { color: var(--muted); font-weight: 700; font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.02em; }