/* ============================================================================
   THEME: MODERN  —  experimental visual refresh, loaded as a pure override
   layer on top of Bootstrap 5 + style.css.

   TO REVERT THE ENTIRE THEME: delete the single <link> line in
   templates/base.html marked "EXPERIMENTAL THEME" (or delete this file).
   No templates or logic depend on this file.
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Manrope:wght@600;700;800&display=swap');

:root {
  /* Refined palette: keep the Swift teal anchor, deepen and enrich it */
  --sw-teal: #0d9488;
  --sw-teal-deep: #0f766e;
  --sw-teal-bright: #14b8a6;
  --sw-ink: #0f172a;
  --sw-slate: #334155;
  --sw-muted: #64748b;
  --sw-border: #e2e8f0;
  --sw-surface: #ffffff;
  --sw-canvas: #f1f5f9;

  --sw-radius: 14px;
  --sw-radius-sm: 10px;

  --sw-shadow-sm: 0 1px 2px rgba(15, 23, 42, .05), 0 1px 1px rgba(15, 23, 42, .03);
  --sw-shadow: 0 1px 2px rgba(15, 23, 42, .05), 0 8px 24px -8px rgba(15, 23, 42, .10);
  --sw-shadow-lg: 0 2px 4px rgba(15, 23, 42, .05), 0 20px 48px -16px rgba(15, 23, 42, .18);

  /* Re-point the legacy + bootstrap variables at the new palette */
  --color-primary: var(--sw-teal);
  --color-primary-dark: var(--sw-teal-deep);
  --color-primary-light: #ccfbf1;
  --color-dark: var(--sw-ink);
  --bs-link-color: var(--sw-teal-deep);
  --bs-link-hover-color: var(--sw-teal);
}

/* ---- Canvas: soft gradient field with ambient glows ---------------------- */
body {
  background-color: var(--sw-canvas);
  background-image:
    radial-gradient(1100px 520px at 85% -10%, rgba(20, 184, 166, .10), transparent 60%),
    radial-gradient(900px 480px at -10% 8%, rgba(45, 55, 72, .08), transparent 55%),
    linear-gradient(180deg, #eef2f7 0%, #f4f7fa 100%);
  background-attachment: fixed;
  color: #1e293b;
}

::selection { background: rgba(20, 184, 166, .25); }

h1, h2, h3, .h1, .h2, .h3, .page-header h2, .navbar-brand span {
  font-family: 'Manrope', 'Inter', system-ui, sans-serif;
  letter-spacing: -0.02em;
}

.page-header h2 {
  font-weight: 800;
  background: linear-gradient(110deg, var(--sw-ink) 55%, var(--sw-teal-deep));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ---- Navbar: deep glass gradient ----------------------------------------- */
.app-navbar {
  /* backdrop-filter below creates a stacking context; without an explicit
     position + z-index the navbar sits at z-index:auto and the later-painted
     <main> card covers dropdown menus that overflow below the bar. */
  position: relative;
  z-index: 1030;
  background: linear-gradient(105deg, #0b1220 0%, #152333 55%, #0d3b3a 100%);
  border-bottom: 1px solid rgba(20, 184, 166, .35);
  backdrop-filter: saturate(140%) blur(8px);
  box-shadow: 0 8px 28px -12px rgba(2, 6, 23, .55);
}

.app-navbar .navbar-brand img {
  filter: drop-shadow(0 2px 6px rgba(20, 184, 166, .35));
}

.app-navbar .nav-link {
  position: relative;
  color: rgba(226, 232, 240, .78);
  border-radius: 8px;
  margin: 0 2px;
  transition: color .18s ease, background-color .18s ease;
}

.app-navbar .nav-link::after {
  content: "";
  position: absolute;
  left: 1rem; right: 1rem; bottom: 4px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--sw-teal-bright), #38bdf8);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .22s ease;
}

.app-navbar .nav-link:hover,
.app-navbar .nav-link:focus {
  color: #fff;
  background: rgba(148, 163, 184, .10);
}

.app-navbar .nav-link:hover::after { transform: scaleX(1); }

/* ---- Main canvas card ----------------------------------------------------- */
main.container {
  border-radius: 20px;
  padding: 2.25rem;
  border: 1px solid rgba(226, 232, 240, .9);
  box-shadow: var(--sw-shadow-lg);
}

/* ---- Cards ----------------------------------------------------------------- */
.card {
  border: 1px solid rgba(226, 232, 240, .85);
  border-radius: var(--sw-radius);
  box-shadow: var(--sw-shadow-sm);
  transition: box-shadow .2s ease, transform .2s ease, border-color .2s ease;
  overflow: hidden;
}

.card.shadow-sm { box-shadow: var(--sw-shadow) !important; }

.card:hover { box-shadow: var(--sw-shadow); }

.project-card:hover {
  transform: translateY(-3px);
  border-color: rgba(20, 184, 166, .55);
  box-shadow: 0 4px 10px rgba(15, 23, 42, .06), 0 20px 36px -16px rgba(13, 148, 136, .28);
}

.card-header {
  background: linear-gradient(180deg, #fbfdfe 0%, #f5f8fa 100%);
  border-bottom: 1px solid rgba(226, 232, 240, .9);
}

.card-header.bg-light { background: linear-gradient(180deg, #fbfdfe 0%, #f3f7f9 100%) !important; }

/* ---- Buttons ---------------------------------------------------------------- */
.btn {
  border-radius: 10px;
  font-weight: 600;
  letter-spacing: .005em;
  transition: transform .12s ease, box-shadow .18s ease, background-color .18s ease,
              border-color .18s ease, color .18s ease;
}

.btn:active { transform: translateY(1px) scale(.99); }

.btn-primary {
  background: linear-gradient(135deg, var(--sw-teal-bright) 0%, var(--sw-teal-deep) 100%);
  border: 0;
  box-shadow: 0 2px 6px rgba(13, 148, 136, .35), inset 0 1px 0 rgba(255, 255, 255, .18);
}

.btn-primary:hover, .btn-primary:focus {
  background: linear-gradient(135deg, #10c2ae 0%, #0d8076 100%);
  box-shadow: 0 4px 14px rgba(13, 148, 136, .45), inset 0 1px 0 rgba(255, 255, 255, .18);
}

.btn-outline-primary {
  color: var(--sw-teal-deep);
  border-color: rgba(13, 148, 136, .45);
  background: rgba(20, 184, 166, .04);
}

.btn-outline-primary:hover, .btn-outline-primary:focus {
  background: linear-gradient(135deg, var(--sw-teal-bright) 0%, var(--sw-teal-deep) 100%);
  border-color: transparent;
  box-shadow: 0 4px 14px rgba(13, 148, 136, .35);
}

.btn-outline-secondary {
  border-color: var(--sw-border);
  color: var(--sw-slate);
  background: #fff;
}

.btn-outline-secondary:hover, .btn-outline-secondary:focus {
  background: var(--sw-ink);
  border-color: var(--sw-ink);
  box-shadow: 0 4px 14px rgba(15, 23, 42, .25);
}

.btn-light {
  background: #fff;
  border-color: var(--sw-border);
}

/* ---- Nav tabs: floating pill rail ------------------------------------------ */
.nav-tabs {
  border-bottom: 0;
  gap: 4px;
  padding: 5px;
  background: rgba(226, 232, 240, .45);
  border-radius: 12px;
  width: fit-content;
  max-width: 100%;
  flex-wrap: wrap;
}

.nav-tabs .nav-link {
  border: 0;
  border-radius: 9px;
  color: var(--sw-muted);
  font-weight: 600;
  font-size: .875rem;
  padding: .45rem .9rem;
  transition: color .15s ease, background-color .15s ease, box-shadow .15s ease;
}

.nav-tabs .nav-link:hover { color: var(--sw-ink); background: rgba(255, 255, 255, .7); }

/* Match the active tab by class AND by the aria attribute Bootstrap keeps in
   sync — belt-and-suspenders against vendor cascade ties on tab buttons. */
.nav-tabs .nav-link.active,
.nav-tabs .nav-link[aria-selected="true"],
.nav-tabs button[data-bs-toggle="tab"].active {
  color: var(--sw-teal-deep) !important;
  background: #fff !important;
  border: 0 !important;
  box-shadow: 0 1px 3px rgba(15, 23, 42, .1), 0 4px 12px -4px rgba(15, 23, 42, .12) !important;
}

/* ---- Tables ------------------------------------------------------------------ */
.table thead th {
  border-bottom: 1px solid var(--sw-border);
  color: #94a3b8;
}

.table > :not(caption) > * > * { border-bottom-color: #eef2f6; }

.table-hover tbody tr:hover,
.table tbody tr:hover { background-color: rgba(20, 184, 166, .035); }

/* ---- Forms -------------------------------------------------------------------- */
.form-control, .form-select {
  border-radius: 10px;
  border-color: var(--sw-border);
  transition: border-color .15s ease, box-shadow .15s ease;
}

.form-control:focus, .form-select:focus {
  border-color: var(--sw-teal);
  box-shadow: 0 0 0 .22rem rgba(20, 184, 166, .16);
}

.input-group-sm > .form-control, .form-control-sm, .form-select-sm { border-radius: 8px; }

/* ---- Badges --------------------------------------------------------------------- */
.badge {
  border-radius: 999px;
  padding: .35em .7em;
  font-weight: 600;
}

/* ---- Alerts ---------------------------------------------------------------------- */
.alert {
  border-radius: var(--sw-radius-sm);
  border-width: 1px;
  box-shadow: var(--sw-shadow-sm);
}

/* ---- Dropdowns -------------------------------------------------------------------- */
.dropdown-menu {
  border-radius: 12px;
  border: 1px solid rgba(226, 232, 240, .9);
  box-shadow: var(--sw-shadow-lg);
  padding: 6px;
  overflow: hidden;
}

.dropdown-item {
  border-radius: 8px;
  font-size: .9rem;
  padding: .45rem .75rem;
  transition: background-color .12s ease;
}

.dropdown-item:hover { background: rgba(20, 184, 166, .08); color: var(--sw-teal-deep); }

/* ---- Modals ------------------------------------------------------------------------ */
.modal-content {
  border-radius: 18px;
  border: 0;
  box-shadow: 0 12px 28px rgba(2, 6, 23, .22), 0 40px 90px -24px rgba(2, 6, 23, .4);
}

.modal-header { border-bottom-color: #eef2f6; }
.modal-footer { border-top-color: #eef2f6; }
.modal-backdrop.show { opacity: .35; backdrop-filter: blur(2px); }

/* ---- Progress bars ------------------------------------------------------------------ */
.progress { border-radius: 999px; background-color: #e9eef4; }
.progress-bar { background: linear-gradient(90deg, var(--sw-teal-bright), #38bdf8); }

/* ---- Footer ---------------------------------------------------------------------------- */
.app-footer {
  background: linear-gradient(105deg, #0b1220 0%, #152333 60%, #0d3b3a 100%);
  border-top: 1px solid rgba(20, 184, 166, .35);
}

/* ---- Scrollbars (WebKit) ----------------------------------------------------------------- */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: #cbd5e1;
  border-radius: 999px;
  border: 2px solid var(--sw-canvas);
}
::-webkit-scrollbar-thumb:hover { background: #94a3b8; }

/* ---- Focus ring for keyboard users ---------------------------------------------------------- */
:focus-visible {
  outline: 2px solid rgba(20, 184, 166, .7);
  outline-offset: 2px;
}

/* ---- Motion preferences ------------------------------------------------------------------------ */
@media (prefers-reduced-motion: reduce) {
  * { transition-duration: .01ms !important; animation-duration: .01ms !important; }
}