/* ==========================================================================
   Transit Alerts V2 — Main Stylesheet
   Mobile-first, WCAG 2.1 AA compliant
   Design aligned to prp-new-v2 reference components (DM Sans, soft palette)
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700;800;900&family=DM+Mono:wght@400;500&display=swap');

:root {
  /* Severity colours — spec-mandated WCAG 2.1 AA contrast tokens */
  --severity-critical:      #DC2626;
  --severity-critical-bg:   #FEF4F4;
  --severity-advisory:      #D97706;
  --severity-advisory-text: #B45309;
  --severity-advisory-bg:   #FFF7ED;
  --severity-info:          #2563EB;
  --severity-info-bg:       #EBF3FD;
  --severity-resolved:      #16A34A;
  --severity-resolved-text: #1A7A52;
  --severity-resolved-bg:   #F0F7F4;

  /* Ink palette — from prp-new-v2 design tokens */
  --color-ink:        #0F1E2E;
  --color-ink-2:      #3D5168;
  --color-ink-3:      #5C6F82;
  --color-muted:      #8C9BAA;
  --color-hairline:   #E3E8EE;
  --color-surface:    #F5F7FA;
  --color-white:      #FFFFFF;
  --color-blue:       #1A6EE8;
  --color-blue-lt:    #EBF3FD;
  --color-red:        #D63B3B;
  --color-red-lt:     #FEF4F4;
  --color-green:      #1A7A52;
  --color-green-lt:   #F0F7F4;

  /* Card */
  --card-bg:                var(--color-white);
  --card-border:            var(--color-hairline);
  --card-border-radius:     10px;
  --card-border-left-width: 4px;
  --card-shadow:            0 1px 3px rgba(15, 30, 46, 0.06), 0 4px 14px rgba(15, 30, 46, 0.08);
  --card-shadow-hover:      0 3px 6px rgba(15, 30, 46, 0.07), 0 10px 28px rgba(15, 30, 46, 0.10);

  /* Typography */
  --font-body:              'DM Sans', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono:              'DM Mono', monospace;
  --font-size-base:         13px;
  --font-size-title:        14px;
  --font-weight-title:      700;

  /* Transitions */
  --transition-fast:        0.16s ease;
}

/* Reset */
*, *::before, *::after { box-sizing: border-box; }

body {
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  margin: 0;
  padding: 0;
  color: var(--color-ink);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ==========================================================================
   SA Card — flat card layout matching prp-new-v2 sa-card
   ========================================================================== */

.sa-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-left-width: var(--card-border-left-width);
  border-radius: var(--card-border-radius);
  box-shadow: var(--card-shadow);
  margin-bottom: 10px;
  overflow: hidden;
  transition: box-shadow var(--transition-fast), transform var(--transition-fast);
  animation: fadeUp 0.2s ease both;
}

.sa-card:hover {
  box-shadow: var(--card-shadow-hover);
  transform: translateY(-1px);
}

/* Status variants */
.sa-card--scheduled { border-left-style: dashed; }
.sa-card--expired   { opacity: 0.6; filter: grayscale(1); }

/* ==========================================================================
   SA Card Body
   ========================================================================== */

.sa-card-body {
  padding: 14px 16px;
}

/* Top row: badges + time */
.sa-card-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 6px;
  gap: 8px;
}

.sa-badges {
  display: flex;
  gap: 5px;
  flex-wrap: wrap;
  align-items: center;
}

.sa-alert-id {
  font-family: var(--font-mono);
  font-size: 9px;
  color: var(--color-muted);
}

.cause-chip {
  font-size: 9px;
  font-weight: 600;
  color: var(--color-ink-3);
  padding: 1px 6px;
  border-radius: 3px;
  width: fit-content;
  background: var(--color-surface);
  border: 1px solid var(--color-hairline);
  white-space: nowrap;
}

.sa-time {
  font-size: 10px;
  color: var(--color-muted);
  flex-shrink: 0;
  margin-top: 1px;
  white-space: nowrap;
}

/* Title */
.sa-title {
  font-size: var(--font-size-title);
  font-weight: var(--font-weight-title);
  color: var(--color-ink);
  line-height: 1.3;
  margin-bottom: 4px;
}

/* Description */
.sa-desc {
  font-size: 12px;
  color: var(--color-ink-3);
  line-height: 1.6;
  margin-bottom: 8px;
}

.sa-desc.is-clamped .sa-desc__text {
  display: -webkit-box;
  -webkit-line-clamp: 4;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.sa-desc__toggle {
  color: var(--color-blue);
  font-weight: 600;
  cursor: pointer;
  margin-left: 3px;
  font-size: 11px;
  background: none;
  border: none;
  padding: 0;
  font-family: inherit;
}

.sa-desc__toggle:hover {
  text-decoration: underline;
}

.sa-desc__toggle:focus-visible {
  outline: 2px solid var(--color-blue);
  outline-offset: 2px;
}

/* Alert image */
.sa-image-wrap {
  margin-bottom: 8px;
}

/* width:100% is the critical defensive guard: it bounds the image to the card regardless of the
   image's intrinsic pixel size, so even a full-resolution original that reached S3 unshrunk cannot
   blow out the layout. max-height caps the vertical footprint per surface; object-fit:contain keeps
   the aspect ratio within those bounds. */
.sa-image {
  width: 100%;
  height: auto;
  border-radius: 6px;
  display: block;
  object-fit: contain;
}

.alerts-widget .sa-image { max-height: 250px; }
.alerts-page .sa-image { max-height: 300px; }
.alerts-page--detail .sa-image { max-height: 600px; }
.alerts-mobile .sa-image { max-height: 200px; }

/* Route pills container */
.sa-routes {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
  margin-bottom: 6px;
}

/* Stops preview */
.sa-stops {
  display: flex;
  align-items: center;
  gap: 5px;
  flex-wrap: wrap;
  margin-bottom: 6px;
}

.sa-stop-label {
  font-size: 10px;
  font-weight: 700;
  color: var(--color-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.sa-stop-pill {
  font-size: 10px;
  color: var(--color-blue);
  background: var(--color-blue-lt);
  border: 1px solid rgba(26, 110, 232, 0.2);
  padding: 1px 6px;
  border-radius: 3px;
}

.sa-service-days {
  display: flex;
  align-items: center;
  gap: 5px;
  flex-wrap: wrap;
  margin-bottom: 6px;
}

.sa-service-days__label {
  font-size: 10px;
  font-weight: 700;
  color: var(--color-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.sa-service-days__pill {
  font-size: 10px;
  font-weight: 600;
  color: var(--color-ink-3);
  background: var(--color-surface);
  border: 1px solid var(--color-hairline);
  padding: 1px 6px;
  border-radius: 3px;
}

.sa-stop-more {
  font-size: 10px;
  font-weight: 600;
  color: var(--color-blue);
  cursor: pointer;
  background: none;
  border: none;
  padding: 0;
  font-family: inherit;
}

.sa-stop-more:hover {
  text-decoration: underline;
}

/* Effects */
.sa-effects {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
}

.eff {
  font-size: 9px;
  font-weight: 700;
  padding: 2px 6px;
  border-radius: 3px;
  text-transform: uppercase;
  letter-spacing: 0.3px;
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  gap: 2px;
  background: var(--color-surface);
  color: var(--color-ink-3);
  border: 1px solid var(--color-hairline);
}

.e-delay   { background: #FFF0E8; color: #B85A00; border-color: #F5D0B0; }
.e-detour  { background: var(--color-blue-lt); color: var(--color-blue); border-color: rgba(26, 110, 232, 0.25); }
.e-reduced { background: var(--color-surface); color: var(--color-ink-3); border-color: var(--color-hairline); }
.e-none    { background: var(--color-red-lt); color: var(--color-red); border-color: #F0BEBE; }
.e-ok      { background: var(--color-green-lt); color: var(--color-green); border-color: rgba(26, 122, 82, 0.25); }

/* Resolved banner */
.sa-resolved {
  display: flex;
  align-items: center;
  gap: 7px;
  background: var(--color-green-lt);
  border: 1px solid rgba(26, 122, 82, 0.2);
  border-radius: 6px;
  padding: 8px 12px;
  margin-top: 8px;
}

.sa-resolved-icon {
  font-size: 15px;
  flex-shrink: 0;
}

.sa-resolved-text {
  font-size: 12px;
  font-weight: 700;
  color: var(--color-green);
}

/* ==========================================================================
   SA Card Footer — matches sa-card-foot from reference
   ========================================================================== */

.sa-card-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 16px;
  border-top: 1px solid var(--card-border);
  background: var(--color-surface);
}

.sa-meta {
  display: flex;
  gap: 10px;
}

.sa-meta-item {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 10px;
  color: var(--color-muted);
}

.sa-meta-item svg {
  flex-shrink: 0;
}

.sa-view-link {
  font-size: 11px;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  text-decoration: none;
  color: var(--color-blue);
  transition: gap var(--transition-fast);
}

.sa-view-link:hover {
  gap: 7px;
}

.sa-view-link:focus-visible {
  outline: 2px solid var(--color-blue);
  outline-offset: 2px;
}

/* ==========================================================================
   Severity Badge — chip style with dot indicator
   ========================================================================== */

.severity-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  border-radius: 4px;
  padding: 3px 8px;
  font-size: 10px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  flex-shrink: 0;
  line-height: 1.4;
  width: fit-content;
}

.severity-badge__dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: currentColor;
  flex-shrink: 0;
}

.severity-badge--critical {
  background: var(--severity-critical-bg);
  color: var(--severity-critical);
}

.severity-badge--advisory {
  background: var(--severity-advisory-bg);
  color: var(--severity-advisory-text);
}

.severity-badge--info {
  background: var(--severity-info-bg);
  color: var(--severity-info);
}

.severity-badge--resolved {
  background: var(--severity-resolved-bg);
  color: var(--severity-resolved-text);
}

/* Faithful banner badge: the agency's banner colour is applied inline (soft tint
   + coloured text). This neutral fallback only applies when the banner has no
   usable colour, so the badge still reads as a labelled chip. */
.severity-badge--banner {
  background: var(--color-surface);
  color: var(--color-ink-2);
}

.sa-resolved-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  border-radius: 999px;
  background: #DCFCE7;
  color: #15803D;
  line-height: 1.4;
}

.severity-badge__icon {
  display: none;
}

/* ==========================================================================
   Route Pills — matches r-pill from reference
   ========================================================================== */

.route-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.route-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 4px;
  padding: 2px 9px;
  font-size: 11px;
  font-weight: 800;
  white-space: nowrap;
  line-height: 1.3;
}

.route-pill--overflow {
  background: var(--color-surface);
  color: var(--color-muted);
  border: 1px solid var(--color-hairline);
  font-size: 9px;
  font-weight: 700;
  padding: 1px 5px;
  border-radius: 3px;
}

.route-pill--all-routes {
  background: var(--color-ink);
  color: var(--color-white);
}

/* ==========================================================================
   Schedule Block
   ========================================================================== */

.schedule-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  border: 1px solid var(--card-border);
  border-radius: 6px;
  overflow: hidden;
  margin: 0;
}

@media (max-width: 480px) {
  .schedule-block { grid-template-columns: 1fr; }
}

.schedule-block__col {
  background: var(--color-surface);
  padding: 10px 14px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.schedule-block__label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--color-muted);
  font-weight: 600;
}

.schedule-block__date { font-weight: 600; font-size: 14px; color: var(--color-ink); }
.schedule-block__time { font-size: 13px; color: var(--color-ink-2); }

/* ==========================================================================
   Empty State
   ========================================================================== */

.empty-state {
  text-align: center;
  padding: 56px 24px;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--card-border-radius);
  box-shadow: var(--card-shadow);
}

.empty-state__icon {
  font-size: 34px;
  display: block;
  margin-bottom: 14px;
}

.empty-state__title {
  font-size: 17px;
  font-weight: 800;
  margin: 0 0 7px;
  color: var(--color-ink);
}

.empty-state__message {
  font-size: 13px;
  margin: 0;
  color: var(--color-ink-3);
  max-width: 300px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.7;
}

/* ==========================================================================
   Page-Level Layout
   ========================================================================== */

.alerts-widget,
.alerts-mobile {
  max-width: 100%;
  margin: 0 auto;
  padding: 24px;
}

/* Standalone pages get a comfortable reading width; when embedded in a
   narrow iframe the constraint is simply inactive. */
.alerts-page main {
  max-width: 720px;
  margin: 0 auto;
  padding: 24px;
}

.alerts-page h1 {
  font-size: 20px;
  font-weight: 800;
  margin: 0 0 16px;
  color: var(--color-ink);
  letter-spacing: -0.4px;
  line-height: 1.2;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  margin-bottom: 20px;
  color: var(--color-ink-3);
  text-decoration: none;
  font-size: 13px;
  font-weight: 700;
  padding: 8px 16px;
  border: 1px solid var(--color-hairline);
  border-radius: 8px;
  background: var(--card-bg);
  transition: all var(--transition-fast);
}

.back-link:hover {
  background: var(--color-surface);
  color: var(--color-ink);
}

.back-link:focus-visible {
  outline: 3px solid var(--color-blue);
  outline-offset: 2px;
}

.toggle-expired-btn {
  background: none;
  border: 1px solid var(--color-hairline);
  border-radius: 7px;
  padding: 8px 16px;
  font-size: 13px;
  font-weight: 700;
  color: var(--color-ink-3);
  cursor: pointer;
  margin-bottom: 16px;
  font-family: inherit;
  transition: all var(--transition-fast);
}

.toggle-expired-btn:hover {
  background: var(--color-surface);
  color: var(--color-ink);
}

.toggle-expired-btn:focus-visible {
  outline: 3px solid var(--color-blue);
  outline-offset: 2px;
}

/* Detail-only extras inside card body (page-detail and mobile channels) */
.sa-detail-schedule {
  margin-top: 10px;
}

.sa-detail-link {
  margin-top: 8px;
}

/* External link in card body (kept for detail page) */
.alert-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--color-blue);
  text-decoration: none;
  font-size: 11px;
  font-weight: 700;
  transition: gap var(--transition-fast);
}

.alert-link:hover { gap: 7px; }

.alert-link:focus-visible {
  outline: 2px solid var(--color-blue);
  outline-offset: 2px;
}

/* ==========================================================================
   Animations
   ========================================================================== */

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ==========================================================================
   Responsive: mobile-first adjustments
   ========================================================================== */

@media (max-width: 640px) {
  .sa-title {
    font-size: 13px;
  }

  .alerts-page main,
  .alerts-widget,
  .alerts-mobile {
    padding: 12px 10px;
  }
}

@media (max-width: 600px) {
  .sa-card-foot {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
    padding: 6px 12px;
  }

  .sa-card-body {
    padding: 10px 12px;
  }

  .sa-card-top {
    flex-direction: column;
    gap: 4px;
  }

  .sa-desc {
    font-size: 11px;
  }
}