/* Wellness On The Top — theme hightech tone sáng, y tế & sức khoẻ */
:root {
  --background: #f3f9fb;
  --surface: #ffffff;
  --foreground: #0b1f2a;
  --muted: #5b7480;
  --border: #dbe9ec;
  --primary: #0d9488;
  --primary-dark: #0b7f75;
  --primary-soft: #e6f7f5;
  --accent: #2563eb;
  --success: #16a34a;
  --danger: #dc2626;
  --radius: 1rem;
}

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

body {
  font-family: -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  color: var(--foreground);
  min-height: 100vh;
  background:
    radial-gradient(1200px 500px at 100% -10%, #d8f2ee 0%, transparent 60%),
    radial-gradient(900px 400px at -10% 0%, #dbe8ff 0%, transparent 55%),
    var(--background);
}

a { color: inherit; text-decoration: none; }
.container { max-width: 1100px; margin: 0 auto; padding: 0 16px; }
.main { padding-top: 32px; padding-bottom: 48px; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 40;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; padding-top: 10px; padding-bottom: 10px; }
.brand img { height: 40px; width: auto; display: block; }
.nav { display: flex; align-items: center; gap: 4px; font-size: 14px; font-weight: 600; flex-wrap: wrap; }
.nav a { padding: 8px 12px; border-radius: 10px; }
.nav a:hover { background: var(--primary-soft); }
.nav-user { color: var(--muted); padding: 0 8px; }

/* Cards & badges */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: 0 1px 2px rgba(13,40,48,.04), 0 8px 24px -12px rgba(13,40,48,.12);
}
.badge {
  display: inline-block; border-radius: 999px; padding: 3px 10px;
  font-size: 11px; font-weight: 700; letter-spacing: .02em; text-transform: uppercase;
  white-space: nowrap;
}
.lang-switch { display: inline-flex; gap: 2px; margin-left: 8px; }
.lang-btn {
  border: 1px solid var(--border); background: var(--surface); color: var(--muted);
  font-size: 11px; font-weight: 700; padding: 5px 8px; border-radius: 8px; cursor: pointer;
}
.lang-btn.active { background: var(--primary); color: #fff; border-color: var(--primary); }
.badge-running { background: var(--primary-soft); color: var(--primary); }
.badge-draft   { background: #f1f5f9; color: var(--muted); }
.badge-ended   { background: #fef2f2; color: var(--danger); }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  border: none; cursor: pointer; border-radius: 12px; padding: 10px 18px;
  font-weight: 600; font-size: 14px; transition: all .15s ease; white-space: nowrap;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-primary:disabled { opacity: .5; cursor: not-allowed; }
.btn-outline { background: transparent; color: var(--foreground); border: 1px solid var(--border); }
.btn-outline:hover { background: var(--primary-soft); border-color: var(--primary); }
.btn-danger { background: var(--danger); color: #fff; }
.btn-sm { padding: 6px 12px; font-size: 13px; border-radius: 10px; }
.btn-block { width: 100%; }

/* Forms */
.input, select.input, textarea.input {
  width: 100%; border: 1px solid var(--border); border-radius: 10px;
  padding: 10px 13px; font-size: 14px; background: var(--surface);
  color: var(--foreground); font-family: inherit;
}
.input:focus { outline: 2px solid var(--primary); outline-offset: 1px; border-color: var(--primary); }
.label { font-size: 13px; font-weight: 600; color: var(--muted); margin-bottom: 5px; display: block; }
.field { margin-bottom: 16px; }
.form-error {
  background: #fef2f2; color: var(--danger); border-radius: 10px;
  padding: 10px 13px; font-size: 14px; font-weight: 500; margin-bottom: 16px;
}
.form-success {
  background: var(--primary-soft); color: var(--primary); border-radius: 10px;
  padding: 10px 13px; font-size: 14px; font-weight: 600; margin-bottom: 16px;
}

/* Hero */
.hero {
  border-radius: 18px; padding: 40px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff; margin-bottom: 32px;
}
.hero .eyebrow { font-size: 13px; font-weight: 700; text-transform: uppercase; letter-spacing: .05em; opacity: .85; margin-bottom: 8px; }
.hero h1 { font-size: 26px; max-width: 640px; }
.hero p { margin-top: 10px; max-width: 560px; opacity: .92; }

/* Grid of campaign cards */
.grid { display: grid; gap: 18px; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); }
.campaign-card { padding: 20px; display: flex; flex-direction: column; }
.campaign-card .meta { display: flex; justify-content: space-between; align-items: center; margin-bottom: 10px; font-size: 12px; color: var(--muted); font-weight: 600; }
.campaign-card h3 { font-size: 16px; margin-bottom: 8px; }
.campaign-card .desc { color: var(--muted); font-size: 14px; flex: 1; margin-bottom: 14px; }
.campaign-card .stock-line { font-size: 14px; margin-bottom: 14px; }

/* Section titles */
.page-title { font-size: 22px; font-weight: 700; margin-bottom: 4px; }
.page-sub { color: var(--muted); font-size: 14px; margin-bottom: 24px; }
.section-title { font-weight: 700; margin-bottom: 14px; }

/* Login page */
.login-wrap { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 16px; }
.login-card { width: 100%; max-width: 420px; padding: 34px; text-align: center; }
.login-card img.logo { height: 64px; width: auto; margin-bottom: 16px; }
.login-card h1 { font-size: 20px; margin-bottom: 4px; }
.login-card .sub { color: var(--muted); font-size: 14px; margin-bottom: 22px; }
.login-card form { text-align: left; }
.login-note { font-size: 12px; color: var(--muted); text-align: center; margin-top: 14px; }

/* Model / size pickers */
.model-grid { display: grid; gap: 12px; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); margin-bottom: 8px; }
.model-box { border: 1px solid var(--border); border-radius: 14px; padding: 14px; }
.model-box h4 { font-size: 15px; margin-bottom: 4px; }
.model-box .left { font-size: 12px; color: var(--muted); margin-bottom: 10px; }
.size-options { display: flex; flex-wrap: wrap; gap: 8px; }
.size-option input { position: absolute; opacity: 0; }
.size-option span {
  display: inline-block; border: 1px solid var(--border); border-radius: 10px;
  padding: 8px 14px; font-size: 13px; font-weight: 600; cursor: pointer;
}
.size-option input:checked + span { background: var(--primary); color: #fff; border-color: var(--primary); }
.size-option.soldout span { opacity: .4; text-decoration: line-through; cursor: not-allowed; }
.size-option span:hover { border-color: var(--primary); }

/* Tables */
.table-wrap { overflow-x: auto; }
table.data { width: 100%; border-collapse: collapse; font-size: 14px; min-width: 640px; }
table.data th {
  text-align: left; font-size: 11px; text-transform: uppercase; color: var(--muted);
  padding: 12px 14px; border-bottom: 1px solid var(--border);
}
table.data td { padding: 12px 14px; border-bottom: 1px solid var(--border); }
table.data tr:last-child td { border-bottom: none; }

/* Admin */
.admin-nav { display: flex; gap: 4px; border-bottom: 1px solid var(--border); padding-bottom: 10px; margin-bottom: 24px; font-size: 14px; font-weight: 600; flex-wrap: wrap; }
.admin-nav a { padding: 8px 12px; border-radius: 10px; }
.admin-nav a:hover { background: var(--primary-soft); }
.toolbar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 18px; flex-wrap: wrap; gap: 10px; }

.item-row { border: 1px solid var(--border); border-radius: 12px; padding: 12px; margin-bottom: 10px; }
.inline-row { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; margin-bottom: 8px; }
.inline-row .input { flex: 1; min-width: 120px; }
.inline-row .input.w-small { flex: 0 0 110px; }

/* Live stock */
.stock-variant { border: 1px solid var(--border); border-radius: 12px; padding: 12px; margin-bottom: 8px; }
.stock-line-main { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.stock-size { font-weight: 700; width: 46px; }
.stock-count { font-size: 18px; font-weight: 700; color: var(--primary); }
.stock-history { border-top: 1px solid var(--border); margin-top: 10px; padding-top: 10px; font-size: 12px; }
.stock-history table { width: 100%; border-collapse: collapse; }
.stock-history th, .stock-history td { text-align: left; padding: 4px 8px 4px 0; }
.stock-history tr + tr td { border-top: 1px solid var(--border); }
.delta-up { color: var(--success); font-weight: 700; }
.delta-down { color: var(--danger); font-weight: 700; }
.muted { color: var(--muted); }
.mb-8 { margin-bottom: 8px; } .mb-16 { margin-bottom: 16px; } .mb-24 { margin-bottom: 24px; }
.p-20 { padding: 20px; } .p-28 { padding: 28px; }
.center { text-align: center; }