/* ============================================================
   CTFd core theme skin — matches the leaderboard React app.
   Mounted via Configs.theme_header on every page in base.html.

   Dual theme: dark (default) + light via [data-theme="light"] on <html>.
   Theme is driven by color_mode_switcher.js which also keeps
   localStorage["theme"] in sync across pages and the embedded
   scoreboard iframe (via the browser's `storage` event).
   ============================================================ */

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

/* -------- DARK (default) palette + Bootstrap overrides -------- */
:root,
:root[data-theme="dark"],
:root[data-bs-theme="dark"] {
  --kc-bg:        #09090b;
  --kc-bg-2:      #0d0d10;
  --kc-surface:   #18181b;
  --kc-surface-2: #1f1f23;
  --kc-border:    rgba(255, 255, 255, 0.08);
  --kc-border-strong: rgba(255, 255, 255, 0.16);
  --kc-text:      #fafafa;
  --kc-muted:     #a1a1aa;
  --kc-dim:       #71717a;
  --kc-accent:    #ef4444;
  --kc-accent-2:  #f87171;
  --kc-accent-glow: rgba(239, 68, 68, 0.25);
  --kc-cyan:      #00e5ff;
  --kc-neon:      #39ff14;
  --kc-mono: "JetBrains Mono", "Fira Code", "Cascadia Code", ui-monospace,
             SFMono-Regular, Menlo, monospace;

  /* Painted layers (themed bgs / watermark) */
  --kc-html-bg:
    radial-gradient(950px 460px at 8% -10%, rgba(239, 68, 68, 0.10), transparent 55%),
    radial-gradient(700px 380px at 95% -5%, rgba(0, 229, 255, 0.06), transparent 55%),
    radial-gradient(900px 600px at 50% 110%, rgba(57, 255, 20, 0.04), transparent 60%),
    #09090b;
  --kc-watermark-filter:
    grayscale(1) contrast(1.05) drop-shadow(0 0 60px rgba(255, 193, 7, 0.25));
  --kc-watermark-ring: rgba(255, 193, 7, 0.03);

  /* Bootstrap overrides */
  --bs-body-bg: var(--kc-bg);
  --bs-body-color: var(--kc-text);
  --bs-body-color-rgb: 250, 250, 250;
  --bs-secondary-color: var(--kc-muted);
  --bs-secondary-color-rgb: 161, 161, 170;
  --bs-tertiary-color: var(--kc-dim);
  --bs-tertiary-bg: var(--kc-surface);
  --bs-tertiary-bg-rgb: 24, 24, 27;
  --bs-secondary-bg: var(--kc-surface);
  --bs-secondary-bg-rgb: 24, 24, 27;
  --bs-border-color: var(--kc-border);
  --bs-border-color-translucent: var(--kc-border);
  --bs-link-color: var(--kc-accent-2);
  --bs-link-color-rgb: 248, 113, 113;
  --bs-link-hover-color: #fca5a5;
  --bs-emphasis-color: var(--kc-text);
  --bs-emphasis-color-rgb: 250, 250, 250;
  --bs-heading-color: var(--kc-text);
  --bs-code-color: var(--kc-cyan);

  --bs-card-bg: rgba(24, 24, 27, 0.55);
  --bs-card-color: var(--kc-text);
  --bs-card-border-color: var(--kc-border);
  --bs-card-cap-bg: rgba(24, 24, 27, 0.7);
  --bs-card-cap-color: var(--kc-text);

  --bs-form-control-bg: rgba(24, 24, 27, 0.7);
  --bs-form-control-color: var(--kc-text);
  --bs-form-control-disabled-bg: rgba(24, 24, 27, 0.4);
  --bs-form-control-disabled-color: var(--kc-dim);
  --bs-form-select-bg: rgba(24, 24, 27, 0.7);
  --bs-form-select-color: var(--kc-text);

  --bs-table-bg: transparent;
  --bs-table-color: var(--kc-text);
  --bs-table-border-color: var(--kc-border);
  --bs-table-striped-bg: rgba(255, 255, 255, 0.025);
  --bs-table-striped-color: var(--kc-text);
  --bs-table-hover-bg: rgba(239, 68, 68, 0.06);
  --bs-table-hover-color: var(--kc-text);

  --bs-modal-bg: var(--kc-surface);
  --bs-modal-color: var(--kc-text);
  --bs-modal-border-color: var(--kc-border);
  --bs-dropdown-bg: var(--kc-surface);
  --bs-dropdown-color: var(--kc-text);
  --bs-dropdown-border-color: var(--kc-border);
  --bs-dropdown-link-color: var(--kc-text);
  --bs-dropdown-link-hover-bg: rgba(239, 68, 68, 0.12);
  --bs-dropdown-link-hover-color: var(--kc-text);
  --bs-dropdown-link-active-bg: var(--kc-accent);
  --bs-dropdown-link-active-color: #fff;

  color-scheme: dark;
}

/* -------- LIGHT palette (clean white/gray with restrained KMA red) -------- */
:root[data-theme="light"],
:root[data-bs-theme="light"] {
  --kc-bg:        #f7f8fa;
  --kc-bg-2:      #eef0f3;
  --kc-surface:   #ffffff;
  --kc-surface-2: #f5f6f8;
  --kc-border:    rgba(31, 35, 41, 0.12);
  --kc-border-strong: rgba(31, 35, 41, 0.20);
  --kc-text:      #2d2b2a;
  --kc-muted:     #6f6b67;
  --kc-dim:       #9a9691;
  --kc-accent:    #c52b3b;
  --kc-accent-2:  #a92332;
  --kc-accent-glow: rgba(197, 43, 59, 0.14);
  --kc-cyan:      #23658a;
  --kc-neon:      #2f7d5a;

  --kc-html-bg:
    radial-gradient(circle at 1px 1px, rgba(45, 43, 42, 0.075) 0.8px, transparent 0.9px) 0 0 / 18px 18px,
    radial-gradient(900px 460px at 50% -20%, rgba(255, 255, 255, 0.96), transparent 70%),
    linear-gradient(180deg, #fbfcfd 0%, #f1f3f5 100%);
  --kc-watermark-filter:
    grayscale(1) contrast(0.9) drop-shadow(0 0 36px rgba(45, 43, 42, 0.12));
  --kc-watermark-ring: rgba(45, 43, 42, 0.045);

  --bs-body-bg: var(--kc-bg);
  --bs-body-color: var(--kc-text);
  --bs-body-color-rgb: 45, 43, 42;
  --bs-secondary-color: var(--kc-muted);
  --bs-secondary-color-rgb: 111, 107, 103;
  --bs-tertiary-color: var(--kc-dim);
  --bs-tertiary-bg: var(--kc-surface);
  --bs-tertiary-bg-rgb: 255, 255, 255;
  --bs-secondary-bg: var(--kc-surface);
  --bs-secondary-bg-rgb: 255, 255, 255;
  --bs-border-color: var(--kc-border);
  --bs-border-color-translucent: var(--kc-border);
  --bs-link-color: var(--kc-accent-2);
  --bs-link-color-rgb: 169, 35, 50;
  --bs-link-hover-color: #c52b3b;
  --bs-emphasis-color: var(--kc-text);
  --bs-emphasis-color-rgb: 45, 43, 42;
  --bs-heading-color: var(--kc-text);
  --bs-code-color: var(--kc-cyan);

  --bs-card-bg: rgba(255, 255, 255, 0.92);
  --bs-card-color: var(--kc-text);
  --bs-card-border-color: var(--kc-border);
  --bs-card-cap-bg: rgba(245, 246, 248, 0.92);
  --bs-card-cap-color: var(--kc-text);

  --bs-form-control-bg: rgba(255, 255, 255, 0.96);
  --bs-form-control-color: var(--kc-text);
  --bs-form-control-disabled-bg: rgba(238, 240, 243, 0.75);
  --bs-form-control-disabled-color: var(--kc-dim);
  --bs-form-select-bg: rgba(255, 255, 255, 0.96);
  --bs-form-select-color: var(--kc-text);

  --bs-table-bg: transparent;
  --bs-table-color: var(--kc-text);
  --bs-table-border-color: var(--kc-border);
  --bs-table-striped-bg: rgba(0, 0, 0, 0.025);
  --bs-table-striped-color: var(--kc-text);
  --bs-table-hover-bg: rgba(197, 43, 59, 0.06);
  --bs-table-hover-color: var(--kc-text);

  --bs-modal-bg: var(--kc-surface);
  --bs-modal-color: var(--kc-text);
  --bs-modal-border-color: var(--kc-border);
  --bs-dropdown-bg: var(--kc-surface);
  --bs-dropdown-color: var(--kc-text);
  --bs-dropdown-border-color: var(--kc-border);
  --bs-dropdown-link-color: var(--kc-text);
  --bs-dropdown-link-hover-bg: rgba(197, 43, 59, 0.10);
  --bs-dropdown-link-hover-color: var(--kc-text);
  --bs-dropdown-link-active-bg: var(--kc-accent);
  --bs-dropdown-link-active-color: #fff;

  color-scheme: light;
}

/* -------- Global layout -------- */
/* The background gradient lives on <html> so body::before (watermark) can
   sit at z-index:-1 inside the body stacking context without being hidden
   by body's own background. */
html {
  background: var(--kc-html-bg) !important;
  min-height: 100vh;
  transition: background-color 0.35s ease;
}
body {
  background: transparent !important;
  color: var(--kc-text) !important;
  font-family: var(--kc-mono);
  letter-spacing: 0.01em;
  min-height: 100vh;
  transition: color 0.25s ease;
}

main, main[role="main"] {
  background: transparent !important;
}

/* -------- Logo watermark + spinning rings -------- */
@keyframes kc-watermark-breathe {
  0%, 100% { opacity: 0.05; transform: translate(-50%, -50%) scale(1); }
  50%      { opacity: 0.09; transform: translate(-50%, -50%) scale(1.02); }
}
@keyframes kc-ring-spin {
  from { transform: translate(-50%, -50%) rotate(0deg); }
  to   { transform: translate(-50%, -50%) rotate(360deg); }
}

body::before,
body::after {
  content: '';
  position: fixed;
  top: 50%;
  left: 50%;
  display: block;
  pointer-events: none;
  z-index: -1;
}

/* Keep the light watermark visible without competing with page content. */
[data-theme="light"] body::before,
[data-bs-theme="light"] body::before {
  opacity: 0.075 !important;
}

body::before {
  /* Static asset, not a Media Library upload: /files/<location> resolves through
     the Files table, so an uploaded logo 404s the moment the DB is replaced. */
  --kc-logo: url('/themes/core/static/img/kma-logo.png');
  width: min(72vmin, 720px);
  aspect-ratio: 1068 / 1131;
  height: auto;
  background-image: var(--kc-logo);
  background-size: 100% auto;
  background-repeat: no-repeat;
  background-position: center;
  filter: var(--kc-watermark-filter);
  animation: kc-watermark-breathe 8s ease-in-out infinite;
  transition: filter 0.35s ease;
}

body::after {
  width: min(72vmin, 720px);
  height: min(72vmin, 720px);
  border-radius: 50%;
  border: 1px solid var(--kc-watermark-ring);
  animation: kc-ring-spin 80s linear infinite;
  transition: border-color 0.35s ease;
}

/* -------- Typography -------- */
h1, h2, h3, h4, h5, h6,
.h1, .h2, .h3, .h4, .h5, .h6 {
  color: var(--kc-text);
  letter-spacing: 0.02em;
}

a { color: var(--kc-accent-2); }
a:hover { color: var(--kc-accent); }

code, pre, kbd, samp, .text-monospace, .font-monospace {
  font-family: var(--kc-mono);
  color: var(--kc-cyan);
}
pre {
  background: var(--kc-surface);
  border: 1px solid var(--kc-border);
  border-radius: 8px;
  padding: 0.75rem 1rem;
}

/* -------- Navbar -------- */
.navbar.bg-dark,
.navbar-dark {
  background:
    linear-gradient(180deg, rgba(13, 13, 16, 0.9), rgba(9, 9, 11, 0.85)) !important;
  border-bottom: 1px solid var(--kc-border);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
[data-theme="light"] .navbar.bg-dark,
[data-theme="light"] .navbar-dark {
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.97), rgba(245, 246, 248, 0.94)) !important;
  border-bottom: 1px solid var(--kc-border);
}

/* Keep the decorative canvas present without overpowering the light surface. */
[data-theme="light"] #kc-particles-canvas,
[data-bs-theme="light"] #kc-particles-canvas {
  opacity: 0.18;
}

.navbar-brand {
  color: var(--kc-text) !important;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
}
.navbar .nav-link {
  color: var(--kc-muted) !important;
  font-weight: 500;
  position: relative;
  padding: 0.5rem 0.85rem;
  transition: color .15s ease;
}
.navbar .nav-link:hover,
.navbar .nav-link.active {
  color: var(--kc-text) !important;
}
.navbar .nav-link::after {
  content: '';
  position: absolute;
  left: 0.85rem;
  right: 0.85rem;
  bottom: 4px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--kc-accent), transparent);
  opacity: 0;
  transform: scaleX(0.4);
  transition: opacity .15s ease, transform .15s ease;
}
.navbar .nav-link:hover::after { opacity: 1; transform: scaleX(1); }

/* In light mode the navbar-toggler icon must invert so it stays visible. */
[data-theme="light"] .navbar-toggler-icon {
  filter: invert(1) brightness(0.4);
}

/* -------- Cards -------- */
.card {
  background: var(--bs-card-bg) !important;
  border: 1px solid var(--kc-border);
  border-radius: 12px;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  color: var(--kc-text);
  transition: background-color 0.3s ease, border-color 0.3s ease;
}
.card-header,
.card-footer {
  background: var(--bs-card-cap-bg) !important;
  border-color: var(--kc-border);
  color: var(--kc-text);
}

/* -------- Jumbotron-style sections -------- */
.jumbotron, .py-5.bg-light, .bg-light, .bg-secondary-subtle {
  background: linear-gradient(180deg, rgba(24, 24, 27, 0.6), rgba(13, 13, 16, 0.65)) !important;
  border: 1px solid var(--kc-border) !important;
  border-radius: 14px !important;
  color: var(--kc-text) !important;
  padding: 2rem 1.75rem;
  margin-bottom: 1.5rem;
}
[data-theme="light"] .jumbotron,
[data-theme="light"] .py-5.bg-light,
[data-theme="light"] .bg-light,
[data-theme="light"] .bg-secondary-subtle {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.94), rgba(245, 246, 248, 0.94)) !important;
}

/* -------- Tables -------- */
.table {
  --bs-table-bg: transparent;
  --bs-table-color: var(--kc-text);
  border-color: var(--kc-border);
  color: var(--kc-text);
}
.table thead th {
  color: var(--kc-muted);
  font-size: 0.72rem;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  border-bottom-color: var(--kc-border-strong);
  font-weight: 700;
}
.table tbody td { border-color: var(--kc-border); }
.table tbody tr:hover { background: var(--bs-table-hover-bg); }

/* -------- Buttons -------- */
.btn {
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-size: 0.82rem;
  border-radius: 8px;
  transition: all .15s ease;
}
.btn-primary {
  background: var(--kc-accent);
  border-color: var(--kc-accent);
  color: #fff;
  box-shadow: 0 0 0 0 var(--kc-accent-glow);
}
.btn-primary:hover,
.btn-primary:focus {
  background: var(--kc-accent-2);
  border-color: var(--kc-accent-2);
  color: #fff;
  box-shadow: 0 0 14px var(--kc-accent-glow);
}
.btn-secondary {
  background: var(--kc-surface);
  border-color: var(--kc-border-strong);
  color: var(--kc-text);
}
.btn-secondary:hover {
  background: var(--kc-surface-2);
  border-color: var(--kc-accent-glow);
  color: var(--kc-text);
}
.btn-outline-primary {
  border-color: var(--kc-accent);
  color: var(--kc-accent-2);
  background: transparent;
}
.btn-outline-primary:hover {
  background: var(--kc-accent);
  color: #fff;
  border-color: var(--kc-accent);
}
.btn-success {
  background: #10b981;
  border-color: #10b981;
  color: #04140d;
}
.btn-success:hover { background: #34d399; border-color: #34d399; }
.btn-danger {
  background: #ef4444;
  border-color: #ef4444;
}

/* -------- Forms -------- */
.form-control,
.form-select,
textarea.form-control {
  background: var(--bs-form-control-bg) !important;
  border: 1px solid var(--kc-border) !important;
  color: var(--kc-text) !important;
  font-family: var(--kc-mono);
  border-radius: 8px;
  transition: border-color .15s ease, box-shadow .15s ease, background-color .15s ease;
}
.form-control:focus,
.form-select:focus,
textarea.form-control:focus {
  border-color: var(--kc-accent) !important;
  box-shadow: 0 0 0 3px var(--kc-accent-glow) !important;
  color: var(--kc-text) !important;
}
.form-control::placeholder { color: var(--kc-dim); }
.form-label, label {
  color: var(--kc-muted);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* -------- Input groups -------- */
.input-group-text {
  background: var(--kc-surface);
  border-color: var(--kc-border);
  color: var(--kc-muted);
}

/* -------- Badges -------- */
.badge {
  border-radius: 6px;
  letter-spacing: 0.06em;
  font-weight: 700;
  text-transform: uppercase;
  padding: 0.35em 0.55em;
}
.badge.bg-secondary {
  background: rgba(127, 127, 127, 0.12) !important;
  color: var(--kc-muted) !important;
  border: 1px solid var(--kc-border);
}
.badge.bg-primary {
  background: var(--kc-accent) !important;
  color: #fff !important;
}
.badge.bg-success {
  background: rgba(16, 185, 129, 0.15) !important;
  color: #059669 !important;
  border: 1px solid rgba(16, 185, 129, 0.4);
}
.badge.bg-warning {
  background: rgba(245, 158, 11, 0.18) !important;
  color: #b45309 !important;
  border: 1px solid rgba(245, 158, 11, 0.4);
}
.badge.bg-danger {
  background: rgba(239, 68, 68, 0.15) !important;
  color: var(--kc-accent-2) !important;
  border: 1px solid rgba(239, 68, 68, 0.4);
}
[data-theme="dark"] .badge.bg-success { color: #34d399 !important; }
[data-theme="dark"] .badge.bg-warning { color: #fbbf24 !important; }
[data-theme="dark"] .badge.bg-danger  { color: #fca5a5 !important; }

/* -------- Alerts -------- */
.alert {
  background: var(--bs-card-bg);
  border: 1px solid var(--kc-border);
  color: var(--kc-text);
  border-radius: 10px;
}
.alert-info    { border-left: 3px solid var(--kc-cyan); }
.alert-success { border-left: 3px solid #10b981; }
.alert-warning { border-left: 3px solid #f59e0b; }
.alert-danger  { border-left: 3px solid var(--kc-accent); }

/* -------- Pagination -------- */
.page-link {
  background: var(--kc-surface);
  border-color: var(--kc-border);
  color: var(--kc-muted);
}
.page-link:hover {
  background: var(--kc-surface-2);
  border-color: var(--kc-accent-glow);
  color: var(--kc-text);
}
.page-item.active .page-link {
  background: var(--kc-accent);
  border-color: var(--kc-accent);
  color: #fff;
}

/* -------- Modals -------- */
.modal-backdrop { background-color: #000; }
.modal-backdrop.show { opacity: 0.65; }
[data-theme="light"] .modal-backdrop { background-color: #1c1917; }
[data-theme="light"] .modal-backdrop.show { opacity: 0.45; }

.modal-content {
  background: var(--kc-surface);
  border: 1px solid var(--kc-border);
  color: var(--kc-text);
  border-radius: 12px;
  box-shadow: 0 12px 48px rgba(0, 0, 0, 0.6);
}
[data-theme="light"] .modal-content {
  box-shadow: 0 12px 48px rgba(0, 0, 0, 0.18);
}
.modal-header,
.modal-footer { border-color: var(--kc-border); }
.modal-header .btn-close,
.btn-close {
  filter: invert(1) grayscale(1);
  opacity: 0.6;
}
[data-theme="light"] .modal-header .btn-close,
[data-theme="light"] .btn-close {
  filter: none;
  opacity: 0.5;
}
.modal-header .btn-close:hover,
.btn-close:hover { opacity: 1; }

/* -------- Dropdowns -------- */
.dropdown-menu {
  background: var(--kc-surface);
  border: 1px solid var(--kc-border);
  border-radius: 10px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
}
[data-theme="light"] .dropdown-menu {
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.12);
}
.dropdown-item { color: var(--kc-text); }
.dropdown-item:hover {
  background: var(--bs-dropdown-link-hover-bg);
  color: var(--kc-text);
}
.dropdown-item.active,
.dropdown-item:active { background: var(--kc-accent); color: #fff; }

/* -------- Footer -------- */
.footer {
  background: linear-gradient(180deg, rgba(9, 9, 11, 0), rgba(9, 9, 11, 0.6));
  border-top: 1px solid var(--kc-border);
  color: var(--kc-muted);
  padding: 1rem 0;
}
[data-theme="light"] .footer {
  background: linear-gradient(180deg, rgba(251, 252, 253, 0), rgba(238, 240, 243, 0.72));
}
.footer .text-muted { color: var(--kc-muted) !important; }
.footer a { color: var(--kc-muted); }
.footer a:hover { color: var(--kc-text); }

/* -------- Snackbar / toast -------- */
.toast,
.snackbar {
  background: var(--kc-surface) !important;
  border: 1px solid var(--kc-border) !important;
  color: var(--kc-text) !important;
}

/* -------- Challenge tiles --------
   The `/challenges` template hardcodes `btn btn-dark` on the button and
   the bundled SCSS (_challenge.scss) flat-colors solved tiles `#29c830`.
   Both look out of place in dark mode and broken in light mode, so we
   override unsolved + solved states for both themes with high specificity
   and `!important`. */
.challenge-button,
.challenge-button.btn,
.challenge-button.btn-dark,
.challenge-card {
  background: var(--bs-card-bg) !important;
  background-color: var(--bs-card-bg) !important;
  background-image: none !important;
  border: 1px solid var(--kc-border) !important;
  color: var(--kc-text) !important;
  border-radius: 12px !important;
  font-family: var(--kc-mono);
  letter-spacing: 0.02em;
  position: relative;
  transition: border-color .15s ease, transform .15s ease, box-shadow .15s ease, background-color .15s ease, color .15s ease;
}
.challenge-button:hover,
.challenge-button.btn:hover,
.challenge-button.btn-dark:hover,
.challenge-card:hover {
  background-color: var(--bs-card-bg) !important;
  border-color: var(--kc-accent-glow) !important;
  color: var(--kc-text) !important;
  box-shadow: 0 0 18px var(--kc-accent-glow);
  transform: translateY(-1px);
}
.challenge-button:focus,
.challenge-button.btn:focus,
.challenge-button.btn-dark:focus,
.challenge-button:focus-visible {
  box-shadow:
    0 0 0 3px var(--kc-accent-glow),
    0 0 18px var(--kc-accent-glow) !important;
  outline: none !important;
}
.challenge-button p,
.challenge-button span {
  color: inherit !important;
  margin: 0;
}
.challenge-button .challenge-inner p {
  font-weight: 600;
  font-size: 0.95rem;
}
.challenge-button .challenge-inner span {
  display: inline-block;
  margin-top: 0.35rem;
  font-size: 0.8rem;
  color: var(--kc-muted) !important;
  font-variant-numeric: tabular-nums;
}

/* Solved state — emerald, dark theme */
.challenge-button.challenge-solved,
.challenge-button.btn.challenge-solved,
.challenge-button.btn-dark.challenge-solved,
.challenge-card.challenge-solved,
.challenge-button.solved-challenge,
.challenge-card.solved-challenge {
  background:
    linear-gradient(180deg, rgba(16, 185, 129, 0.28), rgba(16, 185, 129, 0.10)) !important;
  background-color: rgba(16, 185, 129, 0.18) !important;
  border-color: rgba(16, 185, 129, 0.70) !important;
  color: #d1fae5 !important;
  box-shadow:
    0 0 22px rgba(16, 185, 129, 0.32),
    inset 0 0 0 1px rgba(16, 185, 129, 0.40) !important;
}
.challenge-button.challenge-solved .challenge-inner span,
.challenge-button.solved-challenge .challenge-inner span {
  color: rgba(209, 250, 229, 0.85) !important;
}

/* Solved state — emerald, light theme. Use both selectors so it works
   whether color_mode_switcher set `data-theme` or only Bootstrap's
   `data-bs-theme`. */
[data-theme="light"] .challenge-button.challenge-solved,
[data-theme="light"] .challenge-button.btn-dark.challenge-solved,
[data-theme="light"] .challenge-card.challenge-solved,
[data-theme="light"] .challenge-button.solved-challenge,
[data-theme="light"] .challenge-card.solved-challenge,
[data-bs-theme="light"] .challenge-button.challenge-solved,
[data-bs-theme="light"] .challenge-button.btn-dark.challenge-solved,
[data-bs-theme="light"] .challenge-card.challenge-solved {
  background:
    linear-gradient(180deg, rgba(16, 185, 129, 0.18), rgba(16, 185, 129, 0.06)) !important;
  background-color: rgba(16, 185, 129, 0.10) !important;
  border-color: rgba(5, 150, 105, 0.55) !important;
  color: #065f46 !important;
  box-shadow:
    0 0 18px rgba(16, 185, 129, 0.18),
    inset 0 0 0 1px rgba(5, 150, 105, 0.30) !important;
}
[data-theme="light"] .challenge-button.challenge-solved .challenge-inner span,
[data-bs-theme="light"] .challenge-button.challenge-solved .challenge-inner span {
  color: rgba(6, 95, 70, 0.78) !important;
}

.challenge-button.challenge-solved:hover,
.challenge-button.btn-dark.challenge-solved:hover,
.challenge-card.challenge-solved:hover {
  border-color: rgba(16, 185, 129, 0.90) !important;
  box-shadow:
    0 0 28px rgba(16, 185, 129, 0.42),
    inset 0 0 0 1px rgba(16, 185, 129, 0.55) !important;
  transform: translateY(-1px);
}
[data-theme="light"] .challenge-button.challenge-solved:hover,
[data-bs-theme="light"] .challenge-button.challenge-solved:hover {
  border-color: rgba(5, 150, 105, 0.85) !important;
  box-shadow:
    0 0 22px rgba(16, 185, 129, 0.28),
    inset 0 0 0 1px rgba(5, 150, 105, 0.45) !important;
}

/* Solved state is conveyed by the emerald tint + border alone — no badge.
   (The previous ✓ checkmark looked unprofessional next to the minimal
   mono-font tiles.) */

/* -------- Progress bars -------- */
.progress {
  background: rgba(127, 127, 127, 0.12);
  border-radius: 6px;
  overflow: hidden;
}
.progress-bar { background: var(--kc-accent); }

/* -------- Utilities -------- */
.text-muted, .text-secondary { color: var(--kc-muted) !important; }
.text-light, .text-white { color: var(--kc-text) !important; }
.bg-dark { background-color: var(--kc-bg) !important; }

hr { border-color: var(--kc-border); opacity: 0.6; }

/* -------- Selection -------- */
::selection {
  background: rgba(239, 68, 68, 0.35);
  color: #fff;
}
[data-theme="light"] ::selection {
  background: rgba(220, 38, 38, 0.18);
  color: var(--kc-text);
}

/* -------- Scrollbars -------- */
*::-webkit-scrollbar { width: 8px; height: 8px; }
*::-webkit-scrollbar-thumb {
  background: rgba(127, 127, 127, 0.18);
  border-radius: 8px;
}
*::-webkit-scrollbar-thumb:hover { background: rgba(127, 127, 127, 0.32); }
*::-webkit-scrollbar-track { background: transparent; }

/* -------- Theme toggle button --------
   The navbar already ships one (.theme-switch in components/navbar.html).
   Just make it visible and a touch more prominent. */
.theme-switch {
  background: transparent;
  border: 1px solid transparent;
  cursor: pointer;
  transition: color .15s ease, border-color .15s ease, background-color .15s ease;
}
.theme-switch:hover {
  color: var(--kc-accent-2) !important;
}

/* -------- Chromeless mode --------
   Hide the CTFd navbar (and our watermark) so the embedded React leaderboard
   gets the entire viewport. Triggered by two conditions, OR'd together:
     - `data-page="leaderboard"` on <html> — set by color_mode_switcher.js
       when the URL path is /leaderboard. Always-on for that page.
     - `data-fullscreen="1"` on <html> — set when the user hits F11 (or
       requests fullscreen). One-off, restores when fullscreen exits.

   We also stretch <main> to the full viewport so the iframe inside has
   somewhere to fill.
*/
[data-page="leaderboard"] .navbar,
[data-fullscreen="1"] .navbar,
[data-page="leaderboard"] .footer,
[data-fullscreen="1"] .footer {
  display: none !important;
}
[data-page="leaderboard"] body::before,
[data-page="leaderboard"] body::after,
[data-fullscreen="1"] body::before,
[data-fullscreen="1"] body::after {
  /* The React app paints its own watermark; the skin one would just stack. */
  display: none !important;
}
[data-page="leaderboard"] main,
[data-page="leaderboard"] main[role="main"],
[data-fullscreen="1"] main,
[data-fullscreen="1"] main[role="main"] {
  position: fixed !important;
  inset: 0 !important;
  margin: 0 !important;
  padding: 0 !important;
  height: 100vh !important;
  width: 100vw !important;
  background: transparent !important;
}
/* If a Page-defined iframe lives inside main, make it fill regardless of
   the inline styles the admin pasted. Inline `style="..."` wins, so we
   bump it with !important on the most common positioning properties. */
[data-page="leaderboard"] main iframe,
[data-fullscreen="1"] main iframe {
  position: fixed !important;
  top: 0 !important;
  left: 0 !important;
  right: 0 !important;
  bottom: 0 !important;
  width: 100vw !important;
  height: 100vh !important;
  border: 0 !important;
  background: transparent !important;
}

/* -------- Scoreboard iframe transparency in light mode --------
   The iframe element itself has `background: transparent` inline in
   scoreboard.html, so the parent body's html-bg shows through. The React
   app paints its own background colored by `data-theme` synced via
   the `storage` event. Nothing else to do here. */


/* AI/LLM policy tags use semantic colors wherever a challenge is opened. */
.challenge-tag-ai-allowed {
  background-color: #16a34a !important;
  color: #fff !important;
}

.challenge-tag-ai-prohibited {
  background-color: #dc2626 !important;
  color: #fff !important;
}