/* =====================================================================
   VISTARA SEARCH ENGINE — ORIGINAL DESIGN SYSTEM
   "Search Everything. Discover More."
   ===================================================================== */

:root {
  --color-primary: #4F46E5;
  --color-primary-dark: #3730A3;
  --color-accent: #FF6B35;
  --color-ink: #1A1F36;
  --color-ink-light: #4B5065;
  --color-muted: #6B7280;
  --color-border: #E5E7EB;
  --color-bg: #FFFFFF;
  --color-bg-soft: #F7F8FC;
  --color-success: #16A34A;
  --color-danger: #DC2626;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 24px;
  --shadow-sm: 0 1px 2px rgba(26,31,54,0.06);
  --shadow-md: 0 6px 20px rgba(26,31,54,0.10);
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --max-width: 1100px;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--font-sans);
  color: var(--color-ink);
  background: var(--color-bg);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--color-primary); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; }
button { font-family: inherit; cursor: pointer; }
input, select, textarea { font-family: inherit; font-size: 1rem; }

.container { max-width: var(--max-width); margin: 0 auto; padding: 0 20px; }

/* ---------- Header ---------- */
.site-header {
  border-bottom: 1px solid var(--color-border);
  padding: 14px 0;
}
.site-header__bar {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  gap: 20px;
}
.brand { display: flex; align-items: center; flex-shrink: 0; }
.brand__logo { height: 30px; width: auto; display: block; }
.header-search { flex: 1; display: flex; max-width: 560px; border: 1px solid var(--color-border); border-radius: 999px; padding: 6px 6px 6px 18px; box-shadow: var(--shadow-sm); }
.header-search__input { flex: 1; border: none; outline: none; background: transparent; font-size: 0.95rem; }
.header-search__btn { background: var(--color-primary); color: #fff; border: none; border-radius: 999px; width: 36px; height: 36px; display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.header-links { margin-left: auto; display: flex; gap: 18px; font-size: 0.9rem; white-space: nowrap; }
.header-links a { color: var(--color-ink-light); }

/* ---------- Homepage Hero ---------- */
.hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 8vh 20px 40px;
  text-align: center;
}
.hero__logo { width: min(360px, 70vw); height: auto; margin-bottom: 14px; }
.hero__tagline { color: var(--color-muted); font-size: 1.05rem; margin: 0 0 34px; }

.search-box {
  width: 100%;
  max-width: 620px;
  display: flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 12px 10px 12px 22px;
  box-shadow: var(--shadow-md);
  background: var(--color-bg);
  transition: box-shadow .15s ease;
  position: relative;
}
.search-box:focus-within { box-shadow: 0 0 0 3px rgba(79,70,229,0.15), var(--shadow-md); }
.search-box__icon { color: var(--color-muted); flex-shrink: 0; }
.search-box__input { flex: 1; border: none; outline: none; font-size: 1.05rem; background: transparent; }
.search-box__submit {
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: #fff; border: none; border-radius: 999px;
  padding: 10px 22px; font-weight: 600; font-size: 0.95rem;
  flex-shrink: 0;
}

.autocomplete-list {
  position: absolute;
  top: calc(100% + 8px);
  left: 0; right: 0;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  z-index: 50;
  text-align: left;
  display: none;
}
.autocomplete-list.is-open { display: block; }
.autocomplete-list__item { padding: 10px 18px; font-size: 0.92rem; color: var(--color-ink-light); cursor: pointer; display: flex; align-items: center; gap: 10px; }
.autocomplete-list__item:hover, .autocomplete-list__item.is-active { background: var(--color-bg-soft); color: var(--color-ink); }

.hero__row {
  display: flex; gap: 14px; margin-top: 26px; flex-wrap: wrap; justify-content: center;
}
.select-pill {
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 8px 16px;
  font-size: 0.85rem;
  background: var(--color-bg-soft);
  color: var(--color-ink-light);
}

.chip-row { display: flex; gap: 10px; flex-wrap: wrap; justify-content: center; margin-top: 34px; max-width: 720px; }
.chip {
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 7px 16px;
  font-size: 0.85rem;
  color: var(--color-ink-light);
  background: #fff;
}
.chip:hover { border-color: var(--color-primary); color: var(--color-primary); text-decoration: none; }

.homepage-section { max-width: 900px; margin: 50px auto 0; text-align: center; }
.homepage-section h2 { font-size: 1rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--color-muted); margin-bottom: 16px; }

/* ---------- Search Results Page ---------- */
.site-header--compact .brand__logo { height: 24px; }
.results-layout { display: flex; gap: 30px; max-width: var(--max-width); margin: 24px auto; padding: 0 20px; align-items: flex-start; }
.results-main { flex: 1; min-width: 0; }
.results-meta { color: var(--color-muted); font-size: 0.85rem; margin-bottom: 18px; }

.filter-tabs { display: flex; gap: 4px; flex-wrap: wrap; border-bottom: 1px solid var(--color-border); margin-bottom: 18px; }
.filter-tabs a {
  padding: 10px 16px; font-size: 0.9rem; color: var(--color-ink-light);
  border-bottom: 2px solid transparent; margin-bottom: -1px;
}
.filter-tabs a.is-active { color: var(--color-primary); border-color: var(--color-primary); font-weight: 600; text-decoration: none; }

.result-item { margin-bottom: 28px; max-width: 700px; }
.result-item__url-row { display: flex; align-items: center; gap: 8px; font-size: 0.82rem; color: var(--color-muted); margin-bottom: 4px; }
.result-item__favicon { width: 16px; height: 16px; border-radius: 3px; flex-shrink: 0; background: var(--color-bg-soft); }
.result-item__domain { color: var(--color-ink-light); }
.result-item__title { font-size: 1.15rem; margin: 0 0 4px; }
.result-item__title a { color: #1a0dab; }
.result-item__title a:visited { color: #661bab; }
.result-item__snippet { color: var(--color-ink-light); font-size: 0.92rem; margin: 0; }
.result-item__snippet mark { background: #fff2cc; color: inherit; padding: 0 1px; }
.result-item__badges { display: inline-flex; gap: 6px; margin-left: 6px; }
.badge { font-size: 0.7rem; padding: 1px 8px; border-radius: 999px; background: var(--color-bg-soft); color: var(--color-ink-light); }
.badge--gov { background: #E0F2FE; color: #075985; }
.badge--edu { background: #EDE9FE; color: #5B21B6; }

.no-results { padding: 40px 0; color: var(--color-ink-light); }
.no-results h2 { margin-top: 0; }

.pagination { display: flex; gap: 6px; margin-top: 30px; flex-wrap: wrap; }
.pagination a, .pagination span { padding: 8px 14px; border: 1px solid var(--color-border); border-radius: var(--radius-sm); font-size: 0.9rem; color: var(--color-ink-light); }
.pagination a:hover { border-color: var(--color-primary); color: var(--color-primary); text-decoration: none; }
.pagination .is-current { background: var(--color-primary); color: #fff; border-color: var(--color-primary); }

.results-sidebar { width: 240px; flex-shrink: 0; }
.sidebar-box { border: 1px solid var(--color-border); border-radius: var(--radius-md); padding: 16px; margin-bottom: 16px; }
.sidebar-box h3 { font-size: 0.8rem; text-transform: uppercase; letter-spacing: .06em; color: var(--color-muted); margin: 0 0 12px; }
.sidebar-box label { display: block; font-size: 0.85rem; margin-bottom: 6px; color: var(--color-ink-light); }
.sidebar-box select { width: 100%; padding: 8px 10px; border: 1px solid var(--color-border); border-radius: var(--radius-sm); margin-bottom: 12px; }
.sidebar-box button { width: 100%; padding: 9px; background: var(--color-primary); color: #fff; border: none; border-radius: var(--radius-sm); font-weight: 600; }

/* ---------- Generic content pages (about/privacy/terms/contact/forms) ---------- */
.page-content { max-width: 780px; margin: 40px auto; padding: 0 20px; }
.page-content h1 { font-size: 1.9rem; margin-bottom: 6px; }
.page-content .lead { color: var(--color-muted); margin-bottom: 30px; }
.page-content h2 { font-size: 1.2rem; margin-top: 34px; }
.page-content p, .page-content li { color: var(--color-ink-light); }

.form-card { border: 1px solid var(--color-border); border-radius: var(--radius-md); padding: 28px; box-shadow: var(--shadow-sm); margin-top: 20px; }
.form-group { margin-bottom: 18px; }
.form-group label { display: block; font-weight: 600; font-size: 0.9rem; margin-bottom: 6px; }
.form-group input[type=text], .form-group input[type=email], .form-group input[type=url], .form-group select, .form-group textarea {
  width: 100%; padding: 10px 12px; border: 1px solid var(--color-border); border-radius: var(--radius-sm);
}
.form-group textarea { min-height: 110px; resize: vertical; }
.form-hint { color: var(--color-muted); font-size: 0.8rem; margin-top: 4px; }
.form-row { display: flex; gap: 16px; }
.form-row .form-group { flex: 1; }
.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: #fff; border: none; border-radius: var(--radius-sm); padding: 12px 26px; font-weight: 600; font-size: 0.95rem;
}
.btn-primary:disabled { opacity: 0.6; cursor: not-allowed; }
.alert { padding: 12px 16px; border-radius: var(--radius-sm); margin-bottom: 18px; font-size: 0.9rem; }
.alert-success { background: #DCFCE7; color: #14532D; }
.alert-error { background: #FEE2E2; color: #7F1D1D; }
.honeypot-field { position: absolute; left: -9999px; opacity: 0; height: 0; }

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid var(--color-border); margin-top: 60px; padding: 36px 20px 20px; background: var(--color-bg-soft); }
.site-footer__inner { max-width: var(--max-width); margin: 0 auto; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 20px; }
.site-footer__logo { height: 22px; margin-bottom: 8px; }
.site-footer__brand p { color: var(--color-muted); font-size: 0.85rem; margin: 0; }
.site-footer__links { display: flex; flex-wrap: wrap; gap: 16px; align-items: flex-start; }
.site-footer__links a { font-size: 0.85rem; color: var(--color-ink-light); }
.site-footer__bottom { max-width: var(--max-width); margin: 24px auto 0; padding-top: 16px; border-top: 1px solid var(--color-border); font-size: 0.78rem; color: var(--color-muted); text-align: center; }

/* ---------- Utility ---------- */
.text-center { text-align: center; }
.mt-0 { margin-top: 0; }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .results-layout { flex-direction: column; }
  .results-sidebar { width: 100%; display: flex; gap: 16px; flex-wrap: wrap; }
  .results-sidebar .sidebar-box { flex: 1; min-width: 220px; }
}
@media (max-width: 640px) {
  .site-header__bar { flex-wrap: wrap; }
  .header-search { order: 3; max-width: 100%; width: 100%; }
  .header-links { margin-left: 0; }
  .hero { padding-top: 6vh; }
  .hero__row { flex-direction: column; align-items: center; }
  .form-row { flex-direction: column; }
  .site-footer__inner { flex-direction: column; }
}

/* ---------- Dark mode friendly (prefers-color-scheme) ---------- */
@media (prefers-color-scheme: dark) {
  :root {
    --color-ink: #F3F4F6;
    --color-ink-light: #C7CAD9;
    --color-muted: #9CA3AF;
    --color-border: #2C2F45;
    --color-bg: #12142B;
    --color-bg-soft: #1B1E3A;
  }
  .result-item__title a { color: #93C5FD; }
  .result-item__title a:visited { color: #C4B5FD; }
  .autocomplete-list { background: #1B1E3A; }
}