/* Tarkus — tarkus.online
   Estonian language learning platform */

:root {
  --blue: #0062a3;          /* Estonian flag blue, slightly deepened */
  --blue-bright: #0a84d1;
  --ink: #131a22;
  --ink-soft: #3d4b58;
  --paper: #ffffff;
  --paper-alt: #f3f6f9;
  --line: #dbe3ea;
  --card: #ffffff;
  --accent: #f5c518;        /* warm counterpoint to all the blue/black */
  --radius: 14px;
  --radius-sm: 10px;
  --maxw: 1120px;
  --shadow: 0 1px 2px rgba(19, 26, 34, .06), 0 12px 32px -12px rgba(19, 26, 34, .18);
  --font-sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-display: "Fraunces", Georgia, "Times New Roman", serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --blue: #4aa8e0;
    --blue-bright: #6fbef0;
    --ink: #eef3f7;
    --ink-soft: #a9b8c4;
    --paper: #0f151b;
    --paper-alt: #151d25;
    --line: #27323d;
    --card: #172029;
    --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 16px 40px -16px rgba(0, 0, 0, .6);
  }
}

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

html { scroll-behavior: smooth; scroll-padding-top: 84px; }

body {
  font-family: var(--font-sans);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation: none !important; transition: none !important; }
}

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

.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.container.narrow { max-width: 780px; }

h1, h2, h3, h4 { font-family: var(--font-display); font-weight: 600; line-height: 1.15; letter-spacing: -0.01em; }
h1 { font-size: clamp(2.4rem, 6vw, 3.9rem); }
h2 { font-size: clamp(1.8rem, 3.6vw, 2.6rem); }
h3 { font-size: 1.2rem; }

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

.sr-only, .skip-link {
  position: absolute; width: 1px; height: 1px; padding: 0;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.skip-link:focus {
  position: fixed; top: 12px; left: 12px; width: auto; height: auto;
  clip: auto; background: var(--blue); color: #fff; padding: 10px 16px;
  border-radius: 8px; z-index: 200;
}

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 8px; font-family: var(--font-sans); font-weight: 600; font-size: .95rem;
  padding: 12px 22px; border-radius: 999px; border: 1.5px solid transparent;
  cursor: pointer; transition: transform .12s ease, background .15s ease, box-shadow .15s ease;
  white-space: nowrap;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-primary { background: var(--blue); color: #fff; }
.btn-primary:hover { background: var(--blue-bright); box-shadow: var(--shadow); }
.btn-ghost { border-color: var(--line); color: var(--ink); background: transparent; }
.btn-ghost:hover { border-color: var(--blue); color: var(--blue); }
.btn-lg { padding: 15px 28px; font-size: 1rem; }
.btn-block { width: 100%; }

.eyebrow {
  text-transform: uppercase; letter-spacing: .12em; font-size: .78rem;
  font-weight: 700; color: var(--blue);
}

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.header-inner { display: flex; align-items: center; gap: 24px; height: 68px; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--ink); font-weight: 700; }
.brand:hover { text-decoration: none; }
.brand-mark {
  width: 30px; height: 30px; border-radius: 8px; background: var(--blue);
  color: #fff; font-family: var(--font-display); font-weight: 600;
  display: grid; place-items: center; font-size: 1.1rem;
}
.brand-name { font-family: var(--font-display); font-size: 1.25rem; letter-spacing: -.01em; }

.main-nav { display: flex; gap: 26px; margin-left: 12px; }
.main-nav a { color: var(--ink-soft); font-weight: 500; font-size: .95rem; }
.main-nav a:hover { color: var(--ink); text-decoration: none; }

.header-actions { margin-left: auto; display: flex; align-items: center; gap: 18px; }
.link-quiet { color: var(--ink-soft); font-weight: 500; font-size: .95rem; }

.nav-toggle {
  display: none; margin-left: auto; background: none; border: 0;
  width: 40px; height: 40px; flex-direction: column; gap: 5px;
  justify-content: center; align-items: center; cursor: pointer;
}
.nav-toggle span { width: 22px; height: 2px; background: var(--ink); border-radius: 2px; }

.mobile-nav { display: none; flex-direction: column; gap: 4px; padding: 12px 24px 20px; border-bottom: 1px solid var(--line); }
.mobile-nav a { padding: 12px 4px; color: var(--ink); font-weight: 500; border-bottom: 1px solid var(--line); }
.mobile-nav a.btn { border: none; margin-top: 10px; color: #fff; }

/* Hero */
.hero { padding: clamp(48px, 8vw, 96px) 0; }
.hero-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 56px; align-items: center; }
.hero-copy .eyebrow { display: block; margin-bottom: 18px; }
.hero-copy h1 { margin-bottom: 20px; }
.lead { font-size: 1.18rem; color: var(--ink-soft); max-width: 34ch; margin-bottom: 30px; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 22px; }
.hero-points { list-style: none; display: flex; flex-wrap: wrap; gap: 8px 22px; }
.hero-points li { position: relative; padding-left: 22px; font-size: .9rem; color: var(--ink-soft); }
.hero-points li::before {
  content: "✓"; position: absolute; left: 0; color: var(--blue); font-weight: 700;
}

.lesson-card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 24px; box-shadow: var(--shadow);
}
.lesson-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 14px; }
.tag {
  background: var(--paper-alt); border: 1px solid var(--line); color: var(--ink-soft);
  font-size: .76rem; font-weight: 600; padding: 4px 10px; border-radius: 999px;
}
.lesson-live { font-size: .76rem; font-weight: 600; color: #d6432f; }
.lesson-card h3 { margin-bottom: 6px; }
.lesson-goal { font-size: .9rem; color: var(--ink-soft); margin-bottom: 16px; }
.phrase {
  border-left: 3px solid var(--blue); padding: 6px 0 6px 14px; margin-bottom: 12px;
}
.phrase .et { display: block; font-weight: 600; }
.phrase .en { display: block; font-size: .86rem; color: var(--ink-soft); }
.lesson-foot {
  display: flex; align-items: center; gap: 12px; margin-top: 18px;
  padding-top: 16px; border-top: 1px solid var(--line);
  font-size: .82rem; color: var(--ink-soft);
}
.avatars { display: flex; }
.avatars span {
  width: 26px; height: 26px; border-radius: 50%; background: var(--blue);
  color: #fff; font-size: .68rem; font-weight: 700; display: grid; place-items: center;
  border: 2px solid var(--card); margin-left: -8px;
}
.avatars span:first-child { margin-left: 0; }
.avatars span:last-child { background: var(--ink-soft); }

/* Trust bar */
.trust { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); background: var(--paper-alt); }
.trust-inner { padding: 24px; display: flex; flex-wrap: wrap; align-items: center; gap: 10px 32px; }
.trust-inner p { font-size: .82rem; color: var(--ink-soft); font-weight: 600; text-transform: uppercase; letter-spacing: .08em; }
.trust-inner ul { list-style: none; display: flex; flex-wrap: wrap; gap: 10px 28px; }
.trust-inner li { font-weight: 600; color: var(--ink); }

/* Sections */
.section { padding: clamp(56px, 9vw, 104px) 0; }
.section-alt { background: var(--paper-alt); }
.section-head { max-width: 620px; margin-bottom: 48px; }
.section-head .eyebrow { display: block; margin-bottom: 14px; }
.section-head h2 { margin-bottom: 14px; }
.section-sub { color: var(--ink-soft); font-size: 1.05rem; }

/* Card grids */
.cards-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.cards-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }

.card, .persona {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px;
}
.card-icon {
  font-family: var(--font-display); font-size: 1.4rem; color: var(--blue);
  margin-bottom: 14px; font-weight: 600;
}
.card h3, .persona h3 { margin-bottom: 8px; }
.card p, .persona p { font-size: .95rem; color: var(--ink-soft); }

/* Levels */
.levels { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.level {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 24px; display: flex; flex-direction: column; gap: 8px;
}
.level h3 { color: var(--ink); }
.level p { font-size: .93rem; color: var(--ink-soft); }
.level-meta { margin-top: auto; font-size: .8rem; font-weight: 600; color: var(--blue); padding-top: 8px; }
.level-cta { background: var(--blue); border-color: var(--blue); color: #fff; }
.level-cta h3, .level-cta p { color: #fff; }
.level-cta .btn { margin-top: 8px; background: #fff; border-color: #fff; color: var(--blue); }

/* Steps */
.steps { list-style: none; display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; counter-reset: step; }
.steps li { position: relative; padding-top: 8px; }
.step-n {
  display: grid; place-items: center; width: 42px; height: 42px; border-radius: 12px;
  background: var(--blue); color: #fff; font-family: var(--font-display); font-weight: 600;
  font-size: 1.2rem; margin-bottom: 14px;
}
.steps h3 { margin-bottom: 6px; }
.steps p { font-size: .95rem; color: var(--ink-soft); }

/* Pricing */
.plans { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; align-items: start; }
.plan {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 30px 26px; display: flex; flex-direction: column; gap: 12px;
}
.plan-featured {
  border-color: var(--blue); border-width: 2px; box-shadow: var(--shadow);
  position: relative;
}
.plan-badge {
  position: absolute; top: -13px; left: 26px; background: var(--blue); color: #fff;
  font-size: .72rem; font-weight: 700; text-transform: uppercase; letter-spacing: .08em;
  padding: 4px 12px; border-radius: 999px;
}
.price { font-family: var(--font-display); font-size: 1.1rem; color: var(--ink-soft); }
.price span { font-size: 2.4rem; font-weight: 600; color: var(--ink); }
.plan-note { font-size: .9rem; color: var(--ink-soft); }
.plan ul { list-style: none; display: flex; flex-direction: column; gap: 9px; margin: 6px 0 4px; }
.plan li { position: relative; padding-left: 24px; font-size: .93rem; }
.plan li::before { content: "✓"; position: absolute; left: 0; color: var(--blue); font-weight: 700; }
.plan .btn { margin-top: auto; }
.pricing-foot { text-align: center; margin-top: 32px; color: var(--ink-soft); font-size: .95rem; }

/* Quotes */
.quote-row { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
blockquote {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 28px;
}
blockquote p { font-size: 1.05rem; margin-bottom: 14px; }
blockquote footer { font-size: .88rem; color: var(--ink-soft); font-weight: 600; }

/* FAQ */
.faq-list { display: flex; flex-direction: column; gap: 4px; }
details {
  border-bottom: 1px solid var(--line); padding: 18px 0;
}
summary {
  font-family: var(--font-display); font-weight: 600; font-size: 1.08rem;
  cursor: pointer; list-style: none; display: flex; justify-content: space-between; gap: 16px;
}
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; color: var(--blue); font-size: 1.4rem; line-height: 1; }
details[open] summary::after { content: "–"; }
details p { margin-top: 12px; color: var(--ink-soft); }

/* CTA band */
.cta-band { background: var(--blue); color: #fff; padding: clamp(48px, 8vw, 80px) 0; }
.cta-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center; }
.cta-band h2 { margin-bottom: 8px; }
.cta-band p { color: rgba(255, 255, 255, .85); }
.signup { display: flex; flex-wrap: wrap; gap: 12px; }
.signup input {
  flex: 1 1 220px; padding: 14px 16px; border-radius: 999px; border: 0;
  font-size: 1rem; font-family: var(--font-sans);
}
.signup .btn-primary { background: var(--ink); }
.signup .btn-primary:hover { background: #000; }
.form-msg { flex-basis: 100%; font-size: .88rem; color: #fff; min-height: 1em; }

/* Footer */
.site-footer { background: var(--paper-alt); border-top: 1px solid var(--line); padding-top: 56px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 32px; padding-bottom: 40px; }
.footer-brand p { font-size: .9rem; color: var(--ink-soft); margin-top: 14px; max-width: 34ch; }
.footer-fine { font-size: .84rem; }
.footer-col h4 { font-family: var(--font-sans); font-size: .8rem; text-transform: uppercase; letter-spacing: .1em; color: var(--ink-soft); margin-bottom: 14px; }
.footer-col a { display: block; color: var(--ink); font-size: .92rem; padding: 5px 0; }
.footer-col a:hover { color: var(--blue); text-decoration: none; }
.footer-bottom {
  display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px;
  padding: 22px 24px; border-top: 1px solid var(--line); font-size: .86rem; color: var(--ink-soft);
}
.footer-bottom nav { display: flex; gap: 20px; }
.footer-bottom a { color: var(--ink-soft); }

/* Responsive */
@media (max-width: 960px) {
  .main-nav, .header-actions { display: none; }
  .nav-toggle { display: flex; }
  .mobile-nav { display: none; }
  .mobile-nav.open { display: flex; }
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .lead { max-width: none; }
  .cards-3, .cards-4, .levels, .steps, .plans, .quote-row { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .cta-inner { grid-template-columns: 1fr; }
}

@media (max-width: 620px) {
  .cards-3, .cards-4, .levels, .steps, .plans, .quote-row,
  .footer-grid { grid-template-columns: 1fr; }
  .trust-inner { flex-direction: column; align-items: flex-start; }
  h1 { font-size: 2.3rem; }
}