/* AceIt Support — styles
 * Color tokens mirror src/theme/colors.ts
 */

:root {
  /* Brand */
  --color-primary: #00ADB5;
  --color-primary-light: #11999E;
  --color-secondary: #11999E;

  /* Neutrals */
  --color-white: #FFFFFF;
  --color-bg: #FFFFFF;
  --color-bg-alt: #F7FAFA;
  --color-border: #DDDDDD;
  --color-disabled: #C2C2C2;
  --color-text: #1F2937;
  --color-text-muted: #5B6470;

  /* Semantic */
  --color-success: #008000;
  --color-error: #FF0000;
  --color-warning: #FF9800;
  --color-info: #2196F3;

  /* Subject accents (used for topic icons) */
  --color-edpm: #E91E9C;
  --color-geography: #8B4563;
  --color-history: #2C3E50;
  --color-biology: #F5A623;
  --color-chemistry: #1ABC9C;
  --color-additional-math: #B19CD9;
  --color-poa: #A8C5DA;
  --color-mathematics: #3498DB;
  --color-english: #E74C3C;
  --color-physics: #9B59B6;
  --color-spanish: #F39C12;
  --color-social-studies: #27AE60;

  /* Layout */
  --radius: 8px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06), 0 1px 3px rgba(15, 23, 42, 0.08);
  --shadow-md: 0 6px 16px rgba(15, 23, 42, 0.08);

  /* Typography */
  --font-body: 'Open Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-display: 'Roboto', 'Open Sans', sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

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

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--color-primary);
  color: #fff;
  padding: 8px 12px;
  z-index: 1000;
}
.skip-link:focus { left: 8px; top: 8px; }

.container {
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 16px;
  height: 64px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--color-text);
  text-decoration: none;
}

.brand-mark {
  width: 36px;
  height: 36px;
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  box-shadow: var(--shadow-sm);
}
.brand-mark.small { width: 28px; height: 28px; font-size: 14px; }

.brand-text { display: flex; flex-direction: column; line-height: 1; }
.brand-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
}
.brand-sub {
  margin-top: 2px;
  font-size: 12px;
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.site-nav {
  margin-left: auto;
  display: flex;
  gap: 24px;
}
.site-nav a {
  color: var(--color-text);
  font-weight: 600;
  font-size: 14px;
}
.site-nav a:hover { color: var(--color-primary); text-decoration: none; }

.header-cta { padding: 8px 14px; font-size: 14px; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 18px;
  border-radius: var(--radius);
  border: 1px solid transparent;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 15px;
  cursor: pointer;
  transition: background-color 0.15s ease, transform 0.05s ease, box-shadow 0.15s ease;
  text-decoration: none;
}
.btn:active { transform: translateY(1px); }

.btn-primary {
  background: var(--color-primary);
  color: #fff;
}
.btn-primary:hover { background: var(--color-primary-light); text-decoration: none; }
.btn-primary:focus-visible {
  outline: 3px solid rgba(0, 173, 181, 0.35);
  outline-offset: 2px;
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: 72px 0 56px;
  background:
    radial-gradient(1100px 420px at 20% -10%, rgba(0, 173, 181, 0.12), transparent 60%),
    radial-gradient(900px 360px at 90% 0%, rgba(17, 153, 158, 0.10), transparent 60%),
    var(--color-bg);
  overflow: hidden;
}
.hero::after {
  content: "";
  position: absolute; left: 0; right: 0; bottom: 0;
  height: 1px;
  background: var(--color-border);
}

.hero-inner { max-width: 760px; }

.eyebrow {
  display: inline-block;
  padding: 6px 12px;
  background: rgba(0, 173, 181, 0.10);
  color: var(--color-primary);
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(32px, 5vw, 48px);
  line-height: 1.1;
  margin: 0 0 12px;
  color: var(--color-text);
}

.hero-sub {
  font-size: 18px;
  color: var(--color-text-muted);
  margin: 0 0 24px;
}

.search {
  display: flex;
  gap: 8px;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 6px;
  box-shadow: var(--shadow-sm);
}
.search input {
  flex: 1;
  border: 0;
  outline: 0;
  padding: 12px 14px;
  font-size: 16px;
  font-family: inherit;
  background: transparent;
  color: var(--color-text);
}
.search input:focus { outline: none; }
.search .btn { padding: 10px 16px; }

.hero-actions {
  margin-top: 16px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.chip {
  display: inline-flex;
  padding: 6px 12px;
  border-radius: 999px;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  color: var(--color-text);
  font-size: 13px;
  font-weight: 600;
}
.chip:hover { border-color: var(--color-primary); color: var(--color-primary); text-decoration: none; }

/* ---------- Sections ---------- */
.section { padding: 64px 0; }
.section-alt { background: var(--color-bg-alt); }

.section-title {
  font-family: var(--font-display);
  font-size: clamp(24px, 3.2vw, 32px);
  margin: 0 0 8px;
}
.section-sub {
  color: var(--color-text-muted);
  margin: 0 0 28px;
  font-size: 16px;
}

/* ---------- Cards / Topic grid ---------- */
.card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow-sm);
}

.grid.topics {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
}

.topic-card {
  display: block;
  color: inherit;
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
}
.topic-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: rgba(0, 173, 181, 0.4);
  text-decoration: none;
}
.topic-card h3 {
  margin: 12px 0 6px;
  font-size: 18px;
  color: var(--color-text);
}
.topic-card p {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 14px;
}

.topic-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--accent, var(--color-primary)) 14%, white);
  color: var(--accent, var(--color-primary));
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
}

/* ---------- FAQ ---------- */
.faq {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 8px 16px;
  margin-bottom: 20px;
}
.faq-group {
  margin: 12px 4px 4px;
  font-size: 14px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-primary);
}

.faq details {
  border-top: 1px solid var(--color-border);
  padding: 14px 4px;
}
.faq details:first-of-type { border-top: 0; }

.faq summary {
  cursor: pointer;
  list-style: none;
  font-weight: 600;
  font-size: 16px;
  color: var(--color-text);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 4px 0;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+";
  font-size: 22px;
  color: var(--color-primary);
  transition: transform 0.15s ease;
  line-height: 1;
}
.faq details[open] summary::after { content: "−"; }

.faq p {
  margin: 8px 0 4px;
  color: var(--color-text-muted);
  font-size: 15px;
}

/* ---------- Contact ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: start;
}

.contact-list {
  list-style: none;
  padding: 0;
  margin: 16px 0 0;
  display: grid;
  gap: 12px;
}
.contact-list li {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 14px 16px;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}
.contact-label {
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  font-weight: 700;
}

.contact-form { display: grid; gap: 14px; }
.contact-form h3 { margin: 0 0 4px; font-family: var(--font-display); font-size: 22px; }
.contact-form label { display: grid; gap: 6px; font-size: 14px; font-weight: 600; }
.contact-form input,
.contact-form select,
.contact-form textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-family: inherit;
  font-size: 15px;
  font-weight: 400;
  color: var(--color-text);
  background: var(--color-white);
}
.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(0, 173, 181, 0.15);
}
.contact-form textarea { resize: vertical; min-height: 120px; }

.form-note {
  margin: 0;
  font-size: 13px;
  color: var(--color-text-muted);
}

/* ---------- Status ---------- */
.status-row {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  background: rgba(0, 128, 0, 0.08);
  color: var(--color-success);
  border: 1px solid rgba(0, 128, 0, 0.25);
  border-radius: 999px;
  font-weight: 700;
  font-size: 14px;
}
.status-dot {
  width: 8px; height: 8px;
  background: var(--color-success);
  border-radius: 50%;
  box-shadow: 0 0 0 4px rgba(0, 128, 0, 0.15);
}
.status-row p { margin: 0; color: var(--color-text-muted); }

/* ---------- Footer ---------- */
.site-footer {
  background: #0E1116;
  color: #C9CED6;
  padding: 32px 0;
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.footer-brand {
  font-family: var(--font-display);
  font-weight: 700;
  color: #fff;
  margin-left: 8px;
}
.footer-links { display: flex; gap: 18px; flex-wrap: wrap; }
.footer-links a { color: #C9CED6; font-size: 14px; }
.footer-links a:hover { color: var(--color-primary); text-decoration: none; }
.footer-copy { margin: 0; font-size: 13px; color: #8B93A0; }

/* ---------- Responsive ---------- */
@media (max-width: 720px) {
  .site-nav { display: none; }
  .header-cta { padding: 8px 12px; }
  .search { flex-direction: column; }
  .search .btn { width: 100%; }
  .contact-grid { grid-template-columns: 1fr; gap: 20px; }
  .section { padding: 48px 0; }
  .hero { padding: 56px 0 40px; }
}