:root {
  --navy: #07142a;
  --navy-2: #0b1d3b;
  --ink: #111827;
  --muted: #667085;
  --line: #e5e7eb;
  --panel: #ffffff;
  --soft: #f5f7fb;
  --blue: #2563eb;
  --blue-2: #174ee8;
  --gold: #d49b3d;
  --green: #0f9f6e;
  --red: #ef4444;
  --shadow: 0 18px 45px rgba(15, 23, 42, 0.12);
  --radius: 8px;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
html, body, #app { min-height: 100%; }
body { margin: 0; color: var(--ink); background: var(--soft); }
button, input, textarea, select { font: inherit; }
button { cursor: pointer; }

.app-shell { min-height: 100vh; background: #f6f8fc; }
.topbar {
  height: 92px; display: flex; align-items: center; justify-content: space-between;
  padding: 0 44px; color: #fff; background: linear-gradient(90deg, #051023, #061b3a 64%, #07142a);
  border-bottom: 1px solid rgba(255,255,255,0.08); position: sticky; top: 0; z-index: 20;
}
.brand { display: flex; align-items: center; gap: 14px; font-weight: 900; letter-spacing: .02em; font-size: 28px; }
.brand-mark { width: 42px; height: 42px; display: grid; place-items: center; color: var(--gold); font-size: 34px; font-weight: 900; }
.nav-tabs { display: flex; gap: 44px; align-items: center; }
.nav-tabs button { color: #dbe4f3; background: none; border: 0; padding: 12px 2px; font-size: 18px; }
.nav-tabs button.active { color: #fff; border-bottom: 3px solid #f0bd63; }
.top-actions { display: flex; align-items: center; gap: 18px; }
.token-pill { border: 1px solid rgba(212,155,61,.65); border-radius: 12px; padding: 14px 18px; color: #f2bf62; font-weight: 800; background: rgba(255,255,255,.04); }
.avatar { width: 54px; height: 54px; border-radius: 50%; background: linear-gradient(135deg, #f2f4f7, #b9c1d2); display: grid; place-items: center; color: #0f172a; font-weight: 800; }
.icon-button { border: 1px solid var(--line); background: #fff; min-width: 40px; height: 40px; border-radius: var(--radius); display: inline-grid; place-items: center; color: #1f2937; }

.hero { color: #fff; background: radial-gradient(circle at 82% 30%, rgba(40,121,255,.46), transparent 26%), linear-gradient(110deg, #07142a 0%, #071d3a 58%, #041026 100%); padding: 34px 52px 74px; position: relative; overflow: hidden; }
.hero::after { content: ""; position: absolute; inset: 0; opacity: .5; background-image: linear-gradient(90deg, transparent 95%, rgba(255,255,255,.05) 96%), linear-gradient(0deg, transparent 95%, rgba(255,255,255,.05) 96%); background-size: 42px 42px; }
.hero-content { position: relative; z-index: 1; max-width: 900px; }
.hero-art { position: absolute; right: 8%; top: 18px; width: 420px; aspect-ratio: 1; border-radius: 50%; background: radial-gradient(circle, rgba(255,205,98,.9), rgba(39,128,255,.3) 30%, transparent 62%); border: 1px solid rgba(255,255,255,.15); box-shadow: inset 0 0 70px rgba(65,143,255,.45); }
.hero-art::before, .hero-art::after { content: ""; position: absolute; inset: 44px; border: 1px solid rgba(244,199,111,.55); border-radius: 50%; transform: rotate(-18deg) scaleX(1.35); }
.hero-art::after { inset: 92px; border-color: rgba(255,255,255,.45); transform: rotate(28deg) scaleX(1.45); }
.hero h1 { margin: 16px 0 16px; max-width: 830px; font-size: clamp(40px, 5vw, 68px); line-height: 1.03; letter-spacing: 0; }
.hero p { margin: 0; max-width: 640px; color: #cfd9e8; font-size: 21px; }
.hero-label { color: #f1bd62; letter-spacing: .22em; font-weight: 800; font-size: 16px; }
.search-panel { width: calc(100% - 104px); margin: -44px auto 22px; position: relative; z-index: 2; display: grid; grid-template-columns: 1fr auto; gap: 12px; padding: 10px; border-radius: 14px; background: rgba(255,255,255,.96); box-shadow: var(--shadow); border: 1px solid #d8dde8; }
.search-panel input { border: 0; outline: 0; padding: 18px 22px; font-size: 24px; color: var(--ink); }
.primary-button { border: 0; border-radius: var(--radius); background: linear-gradient(135deg, #2f7cf7, #1452e8); color: #fff; font-weight: 800; padding: 14px 24px; box-shadow: 0 8px 18px rgba(37,99,235,.26); }
.secondary-button { border: 1px solid #cfd6e4; border-radius: var(--radius); background: #fff; color: #111827; font-weight: 700; padding: 11px 16px; }
.gold-button { border: 1px solid #c48925; color: #b97814; background: #fffaf0; border-radius: var(--radius); padding: 11px 14px; font-weight: 800; }
.green-button { border: 1px solid #9ed9c6; color: var(--green); background: #f1fbf7; border-radius: var(--radius); padding: 11px 14px; font-weight: 800; }

.content-wrap { padding: 0 52px 54px; }
.filter-row { display: flex; gap: 12px; flex-wrap: wrap; margin: 18px 0; }
.filter-row button { border: 1px solid #d1d7e3; background: #fff; border-radius: var(--radius); padding: 12px 22px; font-size: 18px; color: #111827; }
.filter-row button.active { background: var(--blue); color: #fff; border-color: var(--blue); }
.section-head { display: flex; align-items: center; justify-content: space-between; margin: 18px 0 14px; }
.section-head h2 { margin: 0; font-size: 28px; }
.bot-grid { display: grid; grid-template-columns: repeat(4, minmax(220px, 1fr)); gap: 18px; }
.bot-card { background: #fff; border: 1px solid #e1e5ee; border-radius: 10px; box-shadow: 0 12px 28px rgba(15,23,42,.08); overflow: hidden; display: flex; flex-direction: column; min-height: 356px; }
.thumb { height: 172px; margin: 12px 12px 0; border-radius: 7px; position: relative; overflow: hidden; background: linear-gradient(135deg, #0e7490, #0f172a); }
.thumb::before { content: ""; position: absolute; inset: -20%; background: radial-gradient(circle at 72% 28%, rgba(255,255,255,.42), transparent 18%), linear-gradient(120deg, transparent 44%, rgba(255,255,255,.16) 45%, transparent 52%); }
.thumb::after { content: attr(data-code); position: absolute; right: 14px; bottom: 12px; color: rgba(255,255,255,.86); font-size: 40px; font-weight: 900; letter-spacing: -.05em; }
.thumb.blue { background: linear-gradient(135deg, #113e8a, #06142e); }
.thumb.gold { background: linear-gradient(135deg, #b7781f, #111827); }
.thumb.green { background: linear-gradient(135deg, #0f9f6e, #11352d); }
.thumb.violet { background: linear-gradient(135deg, #6d28d9, #111827); }
.thumb.teal { background: linear-gradient(135deg, #0f766e, #0c1f36); }
.thumb.slate { background: linear-gradient(135deg, #475569, #020617); }
.thumb.rose { background: linear-gradient(135deg, #be123c, #1f1025); }
.card-body { padding: 10px 16px 16px; display: flex; flex: 1; flex-direction: column; }
.card-meta { display: flex; justify-content: space-between; align-items: center; color: #9a6519; font-size: 14px; }
.category-chip { display: inline-flex; align-items: center; border-radius: 6px; padding: 4px 9px; background: #eaf2ff; color: #155bd7; font-weight: 700; }
.bot-card h3 { margin: 12px 0 6px; font-size: 24px; line-height: 1.1; }
.bot-card p { margin: 0; color: #596273; line-height: 1.45; min-height: 42px; }
.card-foot { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin-top: auto; padding-top: 14px; }
.price { color: #b97814; font-size: 24px; font-weight: 900; white-space: nowrap; }
.price.owned { color: var(--green); }

.chat-layout, .admin-layout { min-height: calc(100vh - 92px); display: grid; }
.chat-layout { grid-template-columns: 78px 308px 1fr; background: #fff; }
.rail { background: #050505; color: #fff; display: flex; flex-direction: column; align-items: center; gap: 26px; padding: 22px 0; }
.rail .brand-mark { width: 40px; height: 64px; font-size: 40px; }
.rail button { width: 50px; height: 50px; border: 0; background: transparent; color: #fff; border-radius: var(--radius); font-size: 22px; }
.rail button.active { background: rgba(255,255,255,.13); border-left: 3px solid var(--gold); }
.chat-side { border-right: 1px solid var(--line); padding: 24px 20px; background: #fbfbfd; overflow: auto; }
.chat-side h2 { margin: 0 0 20px; font-size: 18px; letter-spacing: .08em; }
.current-bot, .thread-item { border: 1px solid var(--line); background: #fff; border-radius: var(--radius); padding: 12px; display: flex; align-items: center; gap: 10px; }
.thread-item { margin: 10px 0; justify-content: space-between; color: #374151; }
.thread-item.active { border-color: #c6954a; background: #fffaf4; }
.bot-mini { width: 44px; height: 44px; border-radius: 7px; background: linear-gradient(135deg, #c08735, #111827); color: #fff; display: grid; place-items: center; font-weight: 900; flex: 0 0 auto; }
.chat-main { display: grid; grid-template-rows: auto 1fr auto; min-width: 0; }
.chat-head { height: 122px; display: flex; justify-content: space-between; align-items: center; padding: 16px 34px; border-bottom: 1px solid var(--line); }
.chat-title { display: flex; gap: 16px; align-items: center; min-width: 0; }
.chat-title h1 { margin: 0; font-size: 26px; }
.chat-title p { margin: 4px 0 0; color: #9a6519; }
.usage-card { border: 1px solid #e0d4c5; border-radius: 10px; padding: 12px 16px; min-width: 214px; }
.usage-bar { height: 5px; border-radius: 999px; background: #eee; margin-top: 8px; overflow: hidden; }
.usage-bar span { display: block; height: 100%; background: #a9722a; width: 62%; }
.messages { padding: 26px 34px; overflow: auto; background: linear-gradient(#fff, #fbfbfc); }
.day-line { display: flex; align-items: center; gap: 14px; color: #89909e; justify-content: center; margin-bottom: 22px; }
.day-line::before, .day-line::after { content: ""; height: 1px; background: var(--line); flex: 1; }
.message { display: flex; gap: 12px; margin: 16px 0; }
.message.user { justify-content: flex-end; }
.bubble { max-width: 760px; border: 1px solid #d8deea; border-radius: 8px; padding: 14px 16px; line-height: 1.55; background: #fff; }
.user .bubble { background: #eaf2ff; border-color: #bed3ff; }
.answer-table { width: 100%; border-collapse: collapse; margin-top: 12px; font-size: 14px; }
.answer-table th, .answer-table td { border: 1px solid #ead7bd; padding: 8px; text-align: left; }
.answer-table th { background: #fff7ed; }
.composer { margin: 0 34px 28px; border: 1px solid #c48925; border-radius: 10px; padding: 12px; background: #fff; }
.prompt-row { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 10px; }
.prompt-row button { border: 1px solid var(--line); background: #fff; border-radius: 7px; padding: 8px 12px; color: #6b4b21; }
.composer textarea { width: 100%; min-height: 76px; resize: vertical; border: 0; outline: 0; font-size: 16px; }
.composer-actions { display: flex; justify-content: space-between; align-items: center; gap: 12px; }

.admin-layout { grid-template-columns: 190px 1fr; background: #f7f9fd; }
.admin-side { background: linear-gradient(180deg, #07142a, #020713); color: #fff; padding: 24px 8px; display: flex; flex-direction: column; gap: 18px; }
.admin-side .brand { font-size: 18px; padding: 0 14px 16px; }
.admin-nav { display: grid; gap: 8px; }
.admin-nav button { text-align: left; border: 0; color: #dbe6f6; background: transparent; border-radius: var(--radius); padding: 13px 16px; }
.admin-nav button.active { background: linear-gradient(135deg, #3347d8, #263baa); color: #fff; }
.admin-user { margin-top: auto; border: 1px solid rgba(255,255,255,.16); border-radius: 9px; padding: 12px; display: flex; gap: 10px; align-items: center; }
.admin-main { overflow: auto; }
.admin-top { height: 60px; display: flex; justify-content: space-between; align-items: center; background: #fff; border-bottom: 1px solid var(--line); padding: 0 26px; }
.admin-search { width: 450px; border: 1px solid #d5dbe8; border-radius: 10px; padding: 10px 14px; }
.admin-content { padding: 22px 26px 34px; }
.kpi-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px; margin: 14px 0; }
.kpi, .admin-card { background: #fff; border: 1px solid #e0e6f0; border-radius: 9px; box-shadow: 0 8px 24px rgba(15,23,42,.05); }
.kpi { padding: 16px; min-height: 116px; }
.kpi small { color: var(--muted); }
.kpi strong { display: block; font-size: 26px; margin: 5px 0; }
.kpi span { color: var(--green); font-weight: 800; }
.admin-grid { display: grid; grid-template-columns: 1.35fr .8fr; gap: 14px; }
.admin-card { padding: 16px; }
.admin-card h3 { margin: 0 0 14px; font-size: 20px; }
.chart { height: 260px; display: flex; align-items: end; gap: 10px; padding: 22px; border: 1px solid #edf0f5; border-radius: 8px; background: linear-gradient(#fff, #f8fbff); }
.bar { flex: 1; min-width: 8px; border-radius: 999px 999px 0 0; background: linear-gradient(#5067ff, #99c7ff); }
.gateway-health { font-size: 48px; color: var(--green); font-weight: 900; }
.form-grid { display: grid; gap: 12px; }
.form-grid label, .modal-card label { display: grid; gap: 6px; color: #475467; font-weight: 700; }
.form-grid input, .form-grid select, .modal-card input, .modal-card textarea { border: 1px solid #d6dce8; border-radius: 8px; padding: 10px 12px; background: #fff; color: #111827; }
.table-list { display: grid; gap: 10px; max-height: 330px; overflow: auto; }
.list-row { display: grid; grid-template-columns: 1fr auto; gap: 12px; align-items: center; padding: 12px; border: 1px solid #e6ebf3; border-radius: 8px; background: #fff; }
.list-row p { margin: 3px 0 0; color: var(--muted); font-size: 13px; }
.status { display: inline-flex; border-radius: 999px; padding: 4px 9px; font-size: 12px; font-weight: 800; }
.status.ok { background: #ecfdf3; color: #067647; }
.status.wait { background: #fff7ed; color: #b54708; }
.status.bad { background: #fef3f2; color: #b42318; }

.modal-backdrop { position: fixed; inset: 0; background: rgba(2, 6, 23, .48); display: grid; place-items: center; z-index: 50; padding: 20px; }
.modal-card { width: min(520px, 100%); background: #fff; border-radius: 12px; padding: 22px; box-shadow: 0 30px 70px rgba(0,0,0,.25); display: grid; gap: 16px; }
.modal-head { display: flex; justify-content: space-between; gap: 16px; }
.modal-head h2 { margin: 0; }
.modal-head p { margin: 4px 0 0; color: var(--muted); }
.empty { padding: 24px; text-align: center; color: var(--muted); border: 1px dashed #ccd4e1; border-radius: 8px; background: #fff; }
.toast { position: fixed; right: 22px; bottom: 22px; background: #111827; color: #fff; padding: 13px 16px; border-radius: 8px; box-shadow: var(--shadow); z-index: 80; }

@media (max-width: 1100px) {
  .bot-grid { grid-template-columns: repeat(2, minmax(220px, 1fr)); }
  .kpi-grid { grid-template-columns: repeat(2, 1fr); }
  .admin-grid { grid-template-columns: 1fr; }
  .hero-art { opacity: .35; right: -40px; }
}
@media (max-width: 760px) {
  .topbar { height: auto; padding: 18px; gap: 18px; flex-wrap: wrap; }
  .nav-tabs { order: 3; width: 100%; justify-content: space-between; gap: 10px; }
  .hero { padding: 30px 20px 70px; }
  .search-panel { width: calc(100% - 30px); grid-template-columns: 1fr; }
  .search-panel input { font-size: 18px; }
  .content-wrap { padding: 0 16px 36px; }
  .bot-grid { grid-template-columns: 1fr; }
  .chat-layout { grid-template-columns: 60px 1fr; }
  .chat-side { display: none; }
  .chat-head { height: auto; padding: 16px; align-items: flex-start; gap: 12px; flex-direction: column; }
  .messages, .composer { margin-left: 16px; margin-right: 16px; padding-left: 0; padding-right: 0; }
  .admin-layout { grid-template-columns: 1fr; }
  .admin-side { position: static; }
  .admin-top { height: auto; padding: 14px; gap: 12px; flex-direction: column; align-items: stretch; }
  .admin-search { width: 100%; }
  .kpi-grid { grid-template-columns: 1fr; }
}.login-page { min-height: 100vh; display: grid; place-items: center; background: radial-gradient(circle at 80% 20%, rgba(37,99,235,.25), transparent 28%), linear-gradient(135deg, #06142c, #020617); padding: 24px; }
.login-card { width: min(460px, 100%); background: #fff; border-radius: 14px; padding: 28px; box-shadow: 0 24px 80px rgba(0,0,0,.28); display: grid; gap: 14px; }
.login-card h1 { margin: 0; font-size: 30px; }
.login-card p { margin: 0; color: var(--muted); }
.login-card label { display: grid; gap: 6px; font-weight: 700; color: #344054; }
.login-card input, .login-card textarea { border: 1px solid #d6dce8; border-radius: 8px; padding: 12px 13px; }
.login-actions { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.alert { border: 1px solid #fed7aa; color: #9a3412; background: #fff7ed; padding: 10px 12px; border-radius: 8px; }
.admin-tabs { display:flex; gap: 8px; flex-wrap: wrap; margin-bottom: 14px; }
.admin-tabs button { border: 1px solid #d6dce8; background: #fff; border-radius: 8px; padding: 9px 12px; font-weight: 700; }
.admin-tabs button.active { background: #294eea; color: #fff; border-color: #294eea; }

/* Frontend reference polish - closer to giaodienweb/fontend.png */
.topbar {
  height: 92px;
  padding: 0 48px;
  background: #07172f;
}
.brand { font-size: 30px; gap: 16px; }
.brand-mark { color: #f2bd5c; font-size: 34px; width: 34px; }
.nav-tabs { gap: 42px; }
.nav-tabs button { font-size: 18px; font-weight: 700; }
.nav-tabs button.active { border-bottom-color: #f0bd63; }
.token-pill { padding: 14px 20px; border-color: #b78436; color: #f0bd63; border-radius: 12px; }

.hero {
  height: 322px;
  padding: 36px 52px 72px;
  background:
    radial-gradient(circle at 80% 54%, rgba(34, 105, 226, .42), transparent 24%),
    radial-gradient(circle at 86% 28%, rgba(19, 52, 115, .72), transparent 28%),
    linear-gradient(90deg, #07162d 0%, #071b38 58%, #06142b 100%);
}
.hero::after {
  opacity: .42;
  background-image:
    linear-gradient(90deg, rgba(255,255,255,.07) 1px, transparent 1px),
    linear-gradient(0deg, rgba(255,255,255,.07) 1px, transparent 1px);
  background-size: 42px 42px;
}
.hero-content { max-width: 900px; }
.hero-label { font-size: 16px; letter-spacing: .34em; margin-bottom: 18px; }
.hero h1 {
  max-width: 880px;
  margin: 0 0 16px;
  font-size: clamp(44px, 3.6vw, 58px);
  line-height: 1.08;
  font-weight: 950;
}
.hero p {
  max-width: 700px;
  font-size: 21px;
  line-height: 1.35;
  color: #d6dfec;
}
.hero-art {
  right: 9%;
  top: 18px;
  width: 420px;
  opacity: .95;
  background:
    radial-gradient(circle at 50% 50%, rgba(247, 194, 91, .95) 0 7%, rgba(247, 194, 91, .46) 10%, transparent 20%),
    radial-gradient(circle at 50% 50%, rgba(43, 124, 255, .36) 0 48%, rgba(15, 63, 141, .42) 49% 60%, transparent 61%),
    repeating-radial-gradient(circle at 50% 50%, transparent 0 28px, rgba(255,255,255,.08) 29px 30px),
    linear-gradient(135deg, rgba(25, 95, 202, .35), rgba(6, 20, 43, .1));
  box-shadow: 0 0 90px rgba(32, 117, 255, .26), inset 0 0 70px rgba(65,143,255,.38);
}
.hero-art::before { inset: 78px 22px; border-color: rgba(242, 189, 92, .7); transform: rotate(-13deg) scaleX(1.22); }
.hero-art::after { inset: 78px 44px; border-color: rgba(218, 232, 255, .5); transform: rotate(25deg) scaleX(1.32); }

.search-panel {
  width: calc(100% - 100px);
  height: 90px;
  margin: -45px auto 22px;
  grid-template-columns: 1fr 292px;
  padding: 10px;
  border-radius: 14px;
  box-shadow: 0 18px 42px rgba(15, 23, 42, .18);
}
.search-panel::before {
  content: "⌕";
  position: absolute;
  left: 28px;
  top: 22px;
  font-size: 38px;
  color: #1f2937;
  opacity: .82;
}
.search-panel input { padding-left: 72px; font-size: 25px; color: #6b7280; }
.search-panel .primary-button { font-size: 24px; border-radius: 9px; }
.content-wrap { padding: 0 52px 54px; }
.filter-row { margin: 14px 0 24px; gap: 14px; }
.filter-row button { min-width: 116px; padding: 12px 20px; font-size: 19px; background: #fff; }
.section-head { margin-top: 4px; }
.section-head h2 { font-size: 29px; }
.bot-grid { gap: 18px; }
.bot-card { border-radius: 10px; min-height: 382px; box-shadow: 0 13px 28px rgba(15,23,42,.09); }
.thumb {
  height: 176px;
  margin: 12px 12px 0;
  border-radius: 7px;
  background:
    radial-gradient(circle at 31% 44%, rgba(255,255,255,.86) 0 9%, rgba(255,255,255,.34) 10% 18%, transparent 19%),
    radial-gradient(circle at 78% 24%, rgba(255,255,255,.38), transparent 18%),
    linear-gradient(135deg, #0f766e, #0f172a);
}
.thumb::before {
  inset: 0;
  background:
    linear-gradient(120deg, transparent 36%, rgba(255,255,255,.13) 37%, transparent 55%),
    radial-gradient(circle at 27% 62%, rgba(255,255,255,.22), transparent 17%),
    linear-gradient(90deg, rgba(255,255,255,.06) 1px, transparent 1px),
    linear-gradient(0deg, rgba(255,255,255,.06) 1px, transparent 1px);
  background-size: auto, auto, 28px 28px, 28px 28px;
}
.thumb::after { font-size: 38px; right: 16px; bottom: 16px; text-shadow: 0 2px 12px rgba(0,0,0,.35); }
.thumb.blue { background: radial-gradient(circle at 30% 44%, rgba(226,245,255,.82) 0 10%, transparent 21%), linear-gradient(135deg, #16428a, #07142a); }
.thumb.gold { background: radial-gradient(circle at 30% 44%, rgba(255,230,170,.72) 0 10%, transparent 22%), linear-gradient(135deg, #9a641d, #101827); }
.thumb.green { background: radial-gradient(circle at 30% 44%, rgba(226,255,247,.74) 0 10%, transparent 22%), linear-gradient(135deg, #15986c, #0f362d); }
.thumb.violet { background: radial-gradient(circle at 30% 44%, rgba(237,229,255,.72) 0 10%, transparent 22%), linear-gradient(135deg, #6728d6, #17203b); }
.thumb.teal { background: radial-gradient(circle at 30% 44%, rgba(218,255,255,.72) 0 10%, transparent 22%), linear-gradient(135deg, #0f766e, #0a243d); }
.thumb.slate { background: radial-gradient(circle at 30% 44%, rgba(241,245,249,.72) 0 10%, transparent 22%), linear-gradient(135deg, #475569, #020617); }
.thumb.rose { background: radial-gradient(circle at 30% 44%, rgba(255,228,230,.72) 0 10%, transparent 22%), linear-gradient(135deg, #be123c, #1f1025); }
.category-chip { background: #e8f1ff; color: #1261d8; }
.bot-card h3 { font-size: 25px; margin-top: 11px; }
.bot-card p { font-size: 16px; color: #4b5563; }
.price { font-size: 25px; }

@media (max-width: 900px) {
  .hero { height: auto; min-height: 360px; }
  .hero h1 { font-size: 42px; }
  .search-panel { grid-template-columns: 1fr; height: auto; }
}