/* =========================================================================
 * sb-components.css — reusable UI: badges, stars, cards, tooltips, forms,
 * alerts, empty states, skeleton loaders, pills. All `.sb-` scoped.
 * ========================================================================= */

/* =========================================================================
 * Star rating (ENT-004: 1 decimal + half-step stars). Drawn with clip-path
 * so half stars are exact; no icon font, no image request.
 * ========================================================================= */
.sb-stars { display: inline-flex; align-items: center; gap: 2px; vertical-align: middle; }
.sb-star {
  --sb-star-size: 18px;
  width: var(--sb-star-size); height: var(--sb-star-size);
  display: inline-block; position: relative;
  background: var(--sb-surface-3);
  -webkit-mask: var(--sb-star-shape) center / contain no-repeat;
          mask: var(--sb-star-shape) center / contain no-repeat;
}
:root {
  --sb-star-shape: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M12 2.5l2.9 6 6.6.9-4.8 4.6 1.2 6.5L12 18.9 6.1 20.5l1.2-6.5L2.5 9.4l6.6-.9z"/></svg>');
}
.sb-star--full { background: var(--sb-amber-500); }
.sb-star--half { background: linear-gradient(90deg, var(--sb-amber-500) 50%, var(--sb-surface-3) 50%); }
.sb-star--empty { background: var(--sb-surface-3); }
.sb-stars--sm .sb-star { --sb-star-size: 14px; }
.sb-stars--lg .sb-star { --sb-star-size: 26px; }

.sb-score-value { font-weight: var(--sb-fw-bold); color: var(--sb-ink-900); margin-left: var(--sb-sp-2); }
.sb-score-count { color: var(--sb-text-muted); font-size: var(--sb-fs-sm); }

/* Interactive star input (rating form) */
.sb-starinput { display: inline-flex; flex-direction: row-reverse; gap: 4px; }
.sb-starinput input { position: absolute; opacity: 0; width: 1px; height: 1px; }
.sb-starinput label {
  width: 32px; height: 32px; cursor: pointer;
  background: var(--sb-surface-3);
  -webkit-mask: var(--sb-star-shape) center / contain no-repeat;
          mask: var(--sb-star-shape) center / contain no-repeat;
  transition: background var(--sb-transition);
}
.sb-starinput label:hover,
.sb-starinput label:hover ~ label,
.sb-starinput input:checked ~ label { background: var(--sb-amber-500); }
.sb-starinput input:focus-visible ~ label:first-of-type,
.sb-starinput label:focus-within { box-shadow: var(--sb-focus); border-radius: 4px; }

/* =========================================================================
 * Badges (UX-003) — Certified / Top 10·50·100 / Stall available.
 * Multilingual: label text comes from PHP/JS, chip styling is language-agnostic.
 * ========================================================================= */
.sb-badge {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: var(--sb-fs-xs); font-weight: var(--sb-fw-semibold);
  padding: 4px 10px; border-radius: var(--sb-radius-pill);
  border: 1px solid transparent; line-height: 1.4; white-space: nowrap;
}
.sb-badge .sb-icon { width: 14px; height: 14px; }
.sb-badge--md { font-size: var(--sb-fs-sm); padding: 5px 12px; }
.sb-badge--certified { background: var(--sb-green-100); color: var(--sb-green-800); border-color: var(--sb-green-400); }
.sb-badge--top { background: var(--sb-amber-100); color: var(--sb-amber-600); border-color: var(--sb-amber-400); }
.sb-badge--stable-free { background: #e6eef6; color: #244b73; border-color: #a9c4e0; }
.sb-badge-row { display: flex; flex-wrap: wrap; gap: var(--sb-sp-2); }

/* Pills / meta chips */
.sb-pill {
  display: inline-flex; align-items: center; gap: 4px;
  font-size: var(--sb-fs-xs); color: var(--sb-text-muted);
  background: var(--sb-surface-2); border: 1px solid var(--sb-border);
  padding: 3px 10px; border-radius: var(--sb-radius-pill);
}

/* =========================================================================
 * Cards
 * ========================================================================= */
.sb-card {
  background: var(--sb-surface); border: 1px solid var(--sb-border);
  border-radius: var(--sb-radius-lg); overflow: hidden;
  transition: box-shadow var(--sb-transition), transform var(--sb-transition), border-color var(--sb-transition);
}
.sb-card--link:hover { box-shadow: var(--sb-shadow); transform: translateY(-2px); border-color: var(--sb-green-400); }
.sb-card__media { position: relative; aspect-ratio: 16 / 10; background: var(--sb-surface-3); overflow: hidden; }
.sb-card__media img { width: 100%; height: 100%; object-fit: cover; display: block; }
.sb-card__badges { position: absolute; top: var(--sb-sp-2); left: var(--sb-sp-2); display: flex; gap: 4px; flex-wrap: wrap; }
.sb-card__body { padding: var(--sb-sp-4); }
.sb-card__title { font-size: var(--sb-fs-md); margin: 0 0 4px; }
.sb-card__title a { text-decoration: none; color: var(--sb-ink-900); }
.sb-card__meta { display: flex; align-items: center; gap: 6px; color: var(--sb-text-muted); font-size: var(--sb-fs-sm); margin-bottom: var(--sb-sp-3); }
.sb-card__score { display: flex; align-items: center; gap: var(--sb-sp-2); }

/* =========================================================================
 * Forms
 * ========================================================================= */
.sb-field { margin-bottom: var(--sb-sp-5); }
.sb-label { display: block; font-weight: var(--sb-fw-semibold); margin-bottom: var(--sb-sp-2); color: var(--sb-ink-900); }
.sb-label .sb-req { color: var(--sb-error); margin-left: 2px; }
.sb-hint { display: block; font-size: var(--sb-fs-sm); color: var(--sb-text-muted); margin-top: var(--sb-sp-2); }
.sb-input, .sb-select, .sb-textarea {
  width: 100%; font: inherit; color: var(--sb-ink-900);
  background: #fff; border: 1px solid var(--sb-border);
  border-radius: var(--sb-radius); padding: var(--sb-sp-3) var(--sb-sp-4);
  min-height: 46px; transition: border-color var(--sb-transition), box-shadow var(--sb-transition);
}
.sb-textarea { min-height: 120px; resize: vertical; }
.sb-input:focus, .sb-select:focus, .sb-textarea:focus { outline: none; border-color: var(--sb-green-500); box-shadow: var(--sb-focus); }
.sb-field.has-error .sb-input,
.sb-field.has-error .sb-select,
.sb-field.has-error .sb-textarea { border-color: var(--sb-error); }
.sb-field__error { display: none; color: var(--sb-error); font-size: var(--sb-fs-sm); margin-top: var(--sb-sp-2); }
.sb-field.has-error .sb-field__error { display: block; }
.sb-inline-group { display: flex; gap: var(--sb-sp-3); flex-wrap: wrap; }
.sb-inline-group > * { flex: 1 1 200px; }

.sb-checkbox { display: flex; align-items: flex-start; gap: var(--sb-sp-3); font-size: var(--sb-fs-sm); }
.sb-checkbox input { margin-top: 3px; width: 18px; height: 18px; accent-color: var(--sb-green-700); }

/* =========================================================================
 * Tooltips / explainer (UX-004) — hover, focus, keyboard AND touch operable.
 * Implemented as a <button> that toggles a popover; hover/focus reveal it too.
 * ========================================================================= */
.sb-tip { position: relative; display: inline-flex; }
.sb-tip__trigger {
  display: inline-flex; align-items: center; justify-content: center;
  width: 20px; height: 20px; border-radius: 50%;
  border: 1px solid var(--sb-green-400); background: var(--sb-green-050);
  color: var(--sb-green-700); font-size: 12px; font-weight: 700; cursor: pointer;
  line-height: 1; padding: 0;
}
.sb-tip__trigger:hover { background: var(--sb-green-100); }
.sb-tip__bubble {
  position: absolute; bottom: calc(100% + 8px); left: 50%; transform: translateX(-50%);
  width: max-content; max-width: 280px; z-index: 50;
  background: var(--sb-ink-900); color: #fff;
  font-size: var(--sb-fs-sm); font-weight: var(--sb-fw-normal); line-height: 1.45;
  padding: var(--sb-sp-3) var(--sb-sp-4); border-radius: var(--sb-radius);
  box-shadow: var(--sb-shadow-lg);
  opacity: 0; visibility: hidden; transition: opacity var(--sb-transition), visibility var(--sb-transition);
}
.sb-tip__bubble::after {
  content: ""; position: absolute; top: 100%; left: 50%; transform: translateX(-50%);
  border: 6px solid transparent; border-top-color: var(--sb-ink-900);
}
.sb-tip:hover .sb-tip__bubble,
.sb-tip__trigger:focus-visible + .sb-tip__bubble,
.sb-tip.is-open .sb-tip__bubble { opacity: 1; visibility: visible; }
@media (max-width: 480px) {
  .sb-tip__bubble { left: 0; transform: none; max-width: min(80vw, 280px); }
  .sb-tip__bubble::after { left: 12px; transform: none; }
}

/* =========================================================================
 * Alerts (form/API feedback — unified error format, api-contract §4)
 * ========================================================================= */
.sb-alert {
  display: flex; gap: var(--sb-sp-3); align-items: flex-start;
  padding: var(--sb-sp-4); border-radius: var(--sb-radius);
  border: 1px solid transparent; margin-bottom: var(--sb-sp-5); font-size: var(--sb-fs-sm);
}
.sb-alert--error { background: var(--sb-error-bg); border-color: #eab8b1; color: #7a241c; }
.sb-alert--success { background: var(--sb-success-bg); border-color: #b7d8c4; color: #1d5637; }
.sb-alert--info { background: var(--sb-info-bg); border-color: var(--sb-green-400); color: var(--sb-green-800); }
.sb-alert[hidden] { display: none; }

/* =========================================================================
 * Empty / error / loading states (UX-001, DEL-002 — states designed in)
 * ========================================================================= */
.sb-state {
  text-align: center; padding: var(--sb-sp-8) var(--sb-sp-4);
  color: var(--sb-text-muted); max-width: 460px; margin-inline: auto;
}
.sb-state__icon {
  width: 56px; height: 56px; margin: 0 auto var(--sb-sp-4);
  color: var(--sb-green-400);
}
.sb-state__title { color: var(--sb-ink-900); font-size: var(--sb-fs-lg); margin-bottom: var(--sb-sp-2); }
.sb-state__actions { margin-top: var(--sb-sp-5); display: flex; gap: var(--sb-sp-3); justify-content: center; flex-wrap: wrap; }
.sb-state[hidden] { display: none; }

/* Skeleton loaders */
.sb-skeleton { position: relative; overflow: hidden; background: var(--sb-surface-3); border-radius: var(--sb-radius-sm); }
.sb-skeleton::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,.6), transparent);
  transform: translateX(-100%); animation: sb-shimmer 1.4s infinite;
}
@keyframes sb-shimmer { 100% { transform: translateX(100%); } }
@media (prefers-reduced-motion: reduce) { .sb-skeleton::after { animation: none; } }
.sb-skeleton--text { height: 14px; margin-bottom: 8px; }
.sb-skeleton--title { height: 22px; width: 60%; margin-bottom: 12px; }

/* Spinner */
.sb-spinner { width: 22px; height: 22px; border: 3px solid var(--sb-green-100); border-top-color: var(--sb-green-600); border-radius: 50%; animation: sb-spin .7s linear infinite; display: inline-block; }
@keyframes sb-spin { 100% { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) { .sb-spinner { animation-duration: 2s; } }

/* Visually-hidden live region for status announcements (a11y) */
.sb-live { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }