/* Modern theme: shared design tokens and component mappings. */
:root {
  --color-primary: #245b66;
  --color-primary-hover: #1b4852;
  --color-accent: #43a6a1;
  --color-ink: #15232b;
  --color-text: #26363d;
  --color-text-muted: #697a80;
  --color-background: #f6f8f8;
  /* Ocean Pearl, tinted with the existing teal/petrol brand colors. */
  --color-ocean-mist: color-mix(in srgb, var(--color-accent) 12%, white);
  --color-ocean-teal: color-mix(in srgb, var(--color-accent) 22%, white);
  --color-ocean-deep: color-mix(in srgb, var(--color-primary) 16%, white);
  --ocean-pearl-base: var(--color-background);
  --ocean-pearl-layer1: linear-gradient(
    transparent 0%, var(--color-ocean-mist) 28%,
    white 38%, var(--color-ocean-teal) 68%, var(--color-ocean-deep) 100%);
  --ocean-pearl-blend1: multiply;
  --ocean-pearl-blur1: 90px;
  --ocean-pearl-layer2: linear-gradient(
    transparent 0%, var(--color-ocean-mist) 34%,
    white 66%, var(--color-ocean-teal) 82%, var(--color-ocean-deep) 100%);
  --ocean-pearl-blend2: multiply;
  --ocean-pearl-blur2: 90px;
  --color-surface: #ffffff;
  --color-surface-alt: #eef3f3;
  --color-border: #dde4e5;
  --color-danger: #d94a4a;
  --color-success: #27865f;
  --color-warning: #d98a24;
  --radius-control: 12px;
  --radius-panel: 20px;
  --navbar-surface: var(--color-ink);
  --navbar-max-width: 1320px;
  --navbar-edge-gap: clamp(0.75rem, 2vw, 1.5rem);
  --shadow-panel: 0 4px 18px rgba(21, 35, 43, 0.05);
  --shadow-hover: 0 8px 24px rgba(21, 35, 43, 0.09);
  --focus-ring: 0 0 0 3px rgba(67, 166, 161, 0.25);
  --bs-body-color: var(--color-text);
  --bs-body-bg: var(--color-background);
  --bs-heading-color: var(--color-ink);
  --bs-secondary-color: var(--color-text-muted);
  --bs-border-color: var(--color-border);
  --bs-link-color: var(--color-primary);
  --bs-link-color-rgb: 36, 91, 102;
  --bs-link-hover-color: var(--color-primary-hover);
  --bs-link-hover-color-rgb: 27, 72, 82;
  --bs-primary-rgb: 36, 91, 102;
  --bs-success-rgb: 39, 134, 95;
  --bs-danger-rgb: 217, 74, 74;
  --bs-warning-rgb: 217, 138, 36;
}

body {
  background: var(--ocean-pearl-base);
  color: var(--color-text);
  isolation: isolate;
}

/* A viewport-sized decorative layer avoids stretching on long pages.
   Only this layer clips its blur; content and modal backdrops remain free. */
.ocean-background {
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  pointer-events: none;
  background: var(--ocean-pearl-base);
}
.ocean-background::before,
.ocean-background::after {
  content: "";
  position: absolute;
  inset: -8%;
}
.ocean-background::before {
  background: var(--ocean-pearl-layer1);
  mix-blend-mode: var(--ocean-pearl-blend1);
  filter: blur(var(--ocean-pearl-blur1));
}
.ocean-background::after {
  background: var(--ocean-pearl-layer2);
  mix-blend-mode: var(--ocean-pearl-blend2);
  filter: blur(var(--ocean-pearl-blur2));
}
@media (min-width: 992px) {
  :root {
    --ocean-pearl-blur1: 130px;
    --ocean-pearl-blur2: 130px;
  }
}
@media print {
  .ocean-background { display: none; }
}
h1, h2, h3, h4, h5, h6 { color: var(--color-ink); font-weight: 600; }
.site-header {
  background: transparent;
  border: 0;
  padding-top: var(--navbar-edge-gap);
  padding-bottom: 0.75rem;
}
.site-navbar {
  width: calc(100% - var(--navbar-edge-gap) - var(--navbar-edge-gap));
  max-width: var(--navbar-max-width);
  margin-inline: auto;
  padding: 0.9rem 1rem;
  background: var(--navbar-surface);
  border: 1px solid var(--color-primary);
  border-radius: var(--radius-panel);
  box-shadow: var(--shadow-hover);
}
.site-navbar > .container {
  max-width: none;
  padding-inline: 0;
}
.site-header .header-statistics {
  color: var(--color-text-muted);
}
@media (max-width: 575.98px) {
  .site-navbar { padding: 0.75rem; }
  .site-navbar .navbar-brand {
    font-size: 1rem;
    letter-spacing: 0.04em;
    margin-right: 0.5rem;
  }
}
.site-navbar .navbar-brand { color: var(--color-surface); }
.site-navbar .navbar-nav { gap: 0.25rem; }
.site-navbar .navbar-collapse { min-width: 0; }
.site-navbar .nav-link {
  color: var(--color-border);
  border-radius: var(--radius-control);
  font-size: 0.875rem;
  font-weight: 500;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
}
.site-navbar .nav-link::after { display: none; }
.site-navbar .nav-link:hover, .site-navbar .nav-link:focus {
  color: var(--color-surface);
  background: var(--color-primary-hover);
  box-shadow: none;
  transform: none;
}
.site-navbar .nav-item.active .nav-link, .site-navbar .nav-link.active {
  color: var(--color-surface);
  background: var(--color-primary);
  box-shadow: none;
}
.site-navbar .navbar-toggler { border-radius: var(--radius-control); box-shadow: none; }
.site-navbar .dropdown-menu { background: var(--color-ink); border-color: var(--color-primary); border-radius: var(--radius-control); box-shadow: var(--shadow-hover); }
.site-navbar .dropdown-item { color: var(--color-surface-alt); border-radius: 6px; }
.site-navbar .dropdown-item:hover, .site-navbar .dropdown-item:focus { background: var(--color-primary); color: var(--color-surface); }
@media (min-width: 992px) {
  .site-navbar .navbar-nav { flex-wrap: wrap; justify-content: flex-end; }
}

.card, .form-narrow, .modal-content, .admin-table-scroll-wrap {
  background: var(--color-surface);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-panel);
  box-shadow: var(--shadow-panel);
}
.bike-card, .bike-card--stolen, .ad-card, .add-bike-card, .front-page-card, .landing-info-card {
  border-color: var(--color-border);
  border-radius: var(--radius-panel);
  box-shadow: var(--shadow-panel);
  color: var(--color-text);
}
.bike-card:hover, .ad-card:hover, .front-page-card:hover, .add-bike-card:hover {
  background: var(--color-surface-alt);
  color: var(--color-text);
  box-shadow: var(--shadow-hover);
}
.bike-card:active, .bike-card--stolen:active, .ad-card:active, .front-page-card:active, .add-bike-card:active { transform: none; }
.front-page-card, .add-bike-card { background: var(--color-surface); }
.front-page-label, .add-bike-main-icon, .add-bike-plus-icon { color: var(--color-ink); }
.front-page-icon, .card-meta-icon { color: var(--color-primary); }
.bike-card--stolen { background: color-mix(in srgb, var(--color-warning) 10%, var(--color-surface)); }
.bike-card--stolen:hover { background: color-mix(in srgb, var(--color-warning) 17%, var(--color-surface)); box-shadow: var(--shadow-hover); }
.card .card-img-top { border-top-left-radius: calc(var(--radius-panel) - 1px); border-top-right-radius: calc(var(--radius-panel) - 1px); }
.marketplace-meta-pill, .filter-group-title { background: var(--color-surface-alt); border-color: var(--color-border); color: var(--color-primary); }
.filter-group { border-color: var(--color-border); }
.list-group-item.section-header, .list-group-title { background: var(--color-primary); color: var(--color-surface); border-color: var(--color-primary); }
.list-group-title a, .list-group-title .bi, .list-group-title strong { color: var(--color-surface); }

.form-control, .form-select, .bike-notes-editor {
  background-color: var(--color-surface);
  color: var(--color-text);
  border-color: var(--color-border);
  border-radius: var(--radius-control);
}
input.form-control, select.form-select, textarea.form-control,
input[type="text"], input[type="email"], input[type="password"], input[type="number"], input[type="file"] { border-radius: var(--radius-control); }
.form-control:focus, .form-select:focus, .bike-notes-editor:focus {
  background-color: var(--color-surface);
  color: var(--color-text);
  border-color: var(--color-accent);
  box-shadow: var(--focus-ring);
}
.form-check-input:checked { background-color: var(--color-primary); border-color: var(--color-primary); }
.form-control:disabled, .form-select:disabled { background-color: var(--color-surface-alt); }
.form-label, .col-form-label { font-weight: 500; }

.site-navbar .nav-link:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}
.chat-container, #messages { background: var(--color-surface); border-color: var(--color-border); }
.message-left { background: var(--color-surface-alt); color: var(--color-text); }
.message-right, #chatForm button { background: var(--color-primary); color: var(--color-surface); }
.message-right .message-timestamp { color: var(--color-border); }
.ad-space-header, .ad-space-footer {
  background: var(--color-surface-alt);
  border-radius: 0;
  padding: 1.5rem 1rem;
}
.ad-space-header { border-bottom: 1px solid var(--color-border); }
.ad-space-footer { border-top: 1px solid var(--color-border); }
footer {
  background: var(--color-ink);
  color: var(--color-surface-alt);
  border-radius: var(--radius-panel);
}
.footer-links a { color: var(--color-border); }
@media (prefers-reduced-motion: reduce) {
  .pt-btn, .card, .site-navbar .nav-link { transition: none; }
}

.list-group { --bs-list-group-bg: var(--color-surface); }
.table { --bs-table-bg: var(--color-surface); }






.alert-info {
  --bs-alert-bg: color-mix(in srgb, var(--color-primary) 10%, var(--color-surface));
  --bs-alert-border-color: color-mix(in srgb, var(--color-primary) 30%, var(--color-surface));
  --bs-alert-color: var(--color-ink);
}

.alert-success {
  --bs-alert-bg: color-mix(in srgb, var(--color-success) 10%, var(--color-surface));
  --bs-alert-border-color: color-mix(in srgb, var(--color-success) 30%, var(--color-surface));
  --bs-alert-color: var(--color-ink);
}

.alert-warning {
  --bs-alert-bg: color-mix(in srgb, var(--color-warning) 10%, var(--color-surface));
  --bs-alert-border-color: color-mix(in srgb, var(--color-warning) 30%, var(--color-surface));
  --bs-alert-color: var(--color-ink);
}

.alert-danger {
  --bs-alert-bg: color-mix(in srgb, var(--color-danger) 10%, var(--color-surface));
  --bs-alert-border-color: color-mix(in srgb, var(--color-danger) 30%, var(--color-surface));
  --bs-alert-color: var(--color-ink);
}

/* Shared listing-card geometry; independent from advertisement images. */
.bike-card-link {
  position: relative;
  isolation: isolate;
  display: block;
  height: 100%;
  border-radius: var(--radius-panel);
}
.bike-card-link:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 4px;
}
.bike-card .bike-card-image {
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  object-position: center;
  background: var(--color-surface);
}