/* ===================================================================
   ITUCTF'26 — beectf.itu.edu.tr look on top of the (Bootstrap 4) Odin theme.
   This theme uses hard-coded Bootstrap colours (light), so we convert the
   whole UI to dark slate + cyan/blue accent with glowing buttons.
   Loaded last in base.html so it wins the cascade.
   =================================================================== */

@import url("https://fonts.googleapis.com/css2?family=Orbitron:wght@500;700;900&family=Rajdhani:wght@400;500;600;700&display=swap");

:root {
  --itu-bg: #020617;
  --itu-bg-alt: #0b1426;
  --itu-surface: #0f172a;
  --itu-surface-2: #15213a;
  --itu-border: rgba(59, 130, 246, 0.18);
  --itu-text: #f1f5f9;
  --itu-muted: #94a3b8;
  --itu-blue: #3b82f6;
  --itu-cyan: #06b6d4;
  --itu-cyan-hi: #22d3ee;
  --itu-grad: linear-gradient(135deg, #3b82f6 0%, #06b6d4 100%);
  --itu-glow: 0 0 22px rgba(6, 182, 212, 0.5);
  --itu-glow-soft: 0 0 18px rgba(59, 130, 246, 0.4);
}

/* ---------- Base ---------- */
html, body, .container { font-family: "Rajdhani", "Lato", sans-serif; }

body {
  background-color: var(--itu-bg) !important;
  color: var(--itu-text) !important;
  background-image:
    radial-gradient(620px circle at 12% 14%, rgba(59, 130, 246, 0.16), transparent 60%),
    radial-gradient(560px circle at 88% 86%, rgba(6, 182, 212, 0.14), transparent 60%),
    linear-gradient(rgba(6, 182, 212, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(6, 182, 212, 0.035) 1px, transparent 1px) !important;
  background-size: 100% 100%, 100% 100%, 42px 42px, 42px 42px !important;
  background-attachment: fixed !important;
}

h1, h2, h3, h4, h5, h6 {
  font-family: "Orbitron", "Raleway", sans-serif !important;
  color: var(--itu-text);
  letter-spacing: 1px;
}

a { color: var(--itu-cyan); }
a:hover, a:focus { color: var(--itu-cyan-hi); }

p, span, td, th, li, label, small, div { color: inherit; }
.text-muted, .text-secondary { color: var(--itu-muted) !important; }
.text-dark, .text-body, .text-black { color: var(--itu-text) !important; }

hr { border-top-color: var(--itu-border) !important; }
::selection { background: rgba(6, 182, 212, 0.35); color: #fff; }

/* ---------- Navbar ---------- */
.navbar.bg-dark, .navbar-dark.bg-dark {
  background: rgba(2, 6, 23, 0.85) !important;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(59, 130, 246, 0.22);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.35);
}
.navbar-dark .navbar-nav .nav-link {
  color: var(--itu-text) !important;
  font-family: "Orbitron", sans-serif;
  font-size: 0.8rem;
  letter-spacing: 1px;
  text-transform: uppercase;
}
.navbar-dark .navbar-nav .nav-link:hover,
.navbar-dark .navbar-nav .nav-link:focus { color: var(--itu-cyan) !important; }

.navbar-brand { display: flex !important; align-items: center; gap: 0.6rem; }
.navbar-brand .brand-logo {
  height: 38px; width: auto;
  filter: drop-shadow(0 0 8px rgba(6, 182, 212, 0.55));
}
.navbar-title {
  font-family: "Orbitron", sans-serif !important;
  font-weight: 900;
  font-size: 1.3rem;
  letter-spacing: 2px;
  background: var(--itu-grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ---------- Buttons (beectf glow) ---------- */
.btn {
  border-radius: 8px !important;
  font-family: "Orbitron", sans-serif;
  letter-spacing: 0.5px;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
}
.btn-primary, .btn-info {
  background: var(--itu-grad) !important;
  border: none !important;
  color: #fff !important;
}
.btn-primary:hover, .btn-info:hover,
.btn-primary:focus, .btn-info:focus {
  background: var(--itu-grad) !important;
  box-shadow: var(--itu-glow) !important;
  transform: translateY(-2px);
  color: #fff !important;
}
.btn-success {
  background: linear-gradient(135deg, #059669, #10b981) !important;
  border: none !important; color: #fff !important;
}
.btn-success:hover { box-shadow: 0 0 22px rgba(16, 185, 129, 0.5) !important; transform: translateY(-2px); }
.btn-danger { background: linear-gradient(135deg, #dc2626, #f43f5e) !important; border: none !important; }
.btn-secondary {
  background: var(--itu-surface-2) !important;
  border: 1px solid var(--itu-border) !important;
  color: var(--itu-text) !important;
}
.btn-outline-primary, .btn-outlined.btn-theme {
  background: transparent !important;
  border: 2px solid var(--itu-cyan) !important;
  color: var(--itu-cyan-hi) !important;
}
.btn-outline-primary:hover, .btn-outlined.btn-theme:hover {
  background: var(--itu-grad) !important;
  border-color: transparent !important;
  color: #fff !important;
  box-shadow: var(--itu-glow) !important;
}

/* ---------- Surfaces: cards / modals / lists / dropdowns ---------- */
.card, .modal-content, .list-group-item, .dropdown-menu {
  background-color: var(--itu-surface) !important;
  color: var(--itu-text) !important;
  border: 1px solid var(--itu-border) !important;
  border-radius: 14px !important;
}
.card-header, .card-footer, .modal-header, .modal-footer {
  background-color: rgba(15, 23, 42, 0.6) !important;
  border-color: var(--itu-border) !important;
  color: var(--itu-text) !important;
}
.card { box-shadow: 0 8px 32px rgba(0, 0, 0, 0.45); }
.dropdown-item { color: var(--itu-text) !important; }
.dropdown-item:hover, .dropdown-item:focus {
  background-color: rgba(59, 130, 246, 0.15) !important;
  color: var(--itu-cyan-hi) !important;
}
.close { color: var(--itu-text) !important; opacity: 0.8; text-shadow: none; }
.close:hover { color: var(--itu-cyan-hi) !important; opacity: 1; }

/* ---------- Jumbotron / page hero ---------- */
.jumbotron {
  background: rgba(15, 23, 42, 0.6) !important;
  border: 1px solid var(--itu-border);
  color: var(--itu-text) !important;
  backdrop-filter: blur(8px);
}
.jumbotron h1, .jumbotron h2 {
  background: var(--itu-grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  font-weight: 900;
}

/* ---------- Forms ---------- */
.form-control, .custom-select, textarea, .input-group-text {
  background-color: rgba(2, 6, 23, 0.6) !important;
  border: 1px solid var(--itu-border) !important;
  color: var(--itu-text) !important;
  border-radius: 8px !important;
}
.form-control::placeholder { color: #64748b !important; }
.form-control:focus, .custom-select:focus, textarea:focus {
  background-color: rgba(2, 6, 23, 0.85) !important;
  border-color: var(--itu-cyan) !important;
  box-shadow: 0 0 0 0.15rem rgba(6, 182, 212, 0.25) !important;
  color: var(--itu-text) !important;
}
.input-group-text { color: var(--itu-muted) !important; }

/* ---------- Tables / scoreboard ---------- */
.table { color: var(--itu-text) !important; }
.table td, .table th { border-color: rgba(59, 130, 246, 0.12) !important; }
.table thead th {
  font-family: "Orbitron", sans-serif;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--itu-cyan-hi) !important;
  border-bottom: 2px solid rgba(59, 130, 246, 0.3) !important;
}
.table-striped tbody tr:nth-of-type(odd) { background-color: rgba(15, 23, 42, 0.4) !important; }
.table-hover tbody tr:hover { background-color: rgba(59, 130, 246, 0.08) !important; color: var(--itu-text); }

/* ---------- Challenge board ---------- */
.challenge-button, .challenges-board .btn, button.challenge-button {
  background-color: var(--itu-surface) !important;
  border: 1px solid var(--itu-border) !important;
  color: var(--itu-text) !important;
  border-radius: 14px !important;
}
.challenge-button:hover, .challenges-board .btn:hover {
  border-color: var(--itu-cyan) !important;
  box-shadow: var(--itu-glow) !important;
  transform: translateY(-5px);
}
.challenge-button.solved-challenge, .challenge-button.solved {
  border-color: rgba(16, 185, 129, 0.6) !important;
  background-color: rgba(6, 78, 59, 0.35) !important;
}
.category-header, .challenge-category, h3.category {
  font-family: "Orbitron", sans-serif !important;
  letter-spacing: 2px;
  text-transform: uppercase;
  border-bottom: 1px solid rgba(59, 130, 246, 0.25);
}

/* ---------- Tabs / pagination / badges / alerts ---------- */
.nav-tabs { border-bottom-color: var(--itu-border) !important; }
.nav-tabs .nav-link { color: var(--itu-muted) !important; border-radius: 8px 8px 0 0; }
.nav-tabs .nav-link.active {
  background: transparent !important;
  color: var(--itu-cyan-hi) !important;
  border-color: var(--itu-border) var(--itu-border) transparent !important;
}
.page-link {
  background: var(--itu-surface) !important;
  border-color: var(--itu-border) !important;
  color: var(--itu-cyan-hi) !important;
}
.page-item.active .page-link { background: var(--itu-grad) !important; border-color: transparent !important; }
.badge-primary { background: var(--itu-grad) !important; }
.badge-secondary { background: rgba(59, 130, 246, 0.18) !important; color: var(--itu-cyan-hi) !important; }
.alert { border-radius: 12px !important; border: 1px solid var(--itu-border); }
.progress { background-color: rgba(2, 6, 23, 0.6) !important; }
.progress-bar { background: var(--itu-grad) !important; }

/* ---------- Footer ---------- */
.footer { background: transparent !important; }
.footer .text-muted, .footer a { color: var(--itu-muted) !important; }

/* ---------- Landing hero (index page) ---------- */
.itu-hero {
  text-align: center;
  padding: 90px 20px 80px;
  max-width: 900px;
  margin: 0 auto;
}
.itu-hero-logo {
  width: 160px;
  height: auto;
  margin-bottom: 28px;
  filter: drop-shadow(0 0 28px rgba(6, 182, 212, 0.55));
  animation: itu-float 5s ease-in-out infinite;
}
@keyframes itu-float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}
.itu-hero-title {
  font-family: "Orbitron", sans-serif !important;
  font-weight: 900;
  font-size: clamp(3rem, 9vw, 6rem);
  letter-spacing: 4px;
  margin: 0 0 0.4rem;
  line-height: 1.05;
  background: var(--itu-grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: 0 0 40px rgba(6, 182, 212, 0.25);
}
.itu-hero-sub {
  font-family: "Orbitron", sans-serif;
  text-transform: uppercase;
  letter-spacing: 3px;
  font-size: clamp(0.8rem, 2.2vw, 1.05rem);
  color: var(--itu-cyan-hi) !important;
  margin-bottom: 1.4rem;
}
.itu-hero-desc {
  font-size: clamp(1rem, 2.4vw, 1.3rem);
  color: var(--itu-muted) !important;
  max-width: 640px;
  margin: 0 auto 2.4rem;
  line-height: 1.7;
}
.itu-hero-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}
.itu-hero-actions .btn-lg {
  padding: 0.85rem 2.4rem;
  font-size: 1rem;
}

/* ---------- Scrollbar ---------- */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--itu-bg); }
::-webkit-scrollbar-thumb { background: rgba(59, 130, 246, 0.45); border-radius: 6px; }
::-webkit-scrollbar-thumb:hover { background: var(--itu-cyan); }

/* ---------- ctfd-whale instance panel (compact) ---------- */
.whale-panel { margin-top: 1.1rem; }
.whale-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.6rem 1rem;
  padding: 0.7rem 1rem;
  background: var(--itu-surface) !important;
  border: 1px solid var(--itu-border);
  border-radius: 10px;
  box-shadow: var(--itu-glow-soft);
}
#whale-panel-stopped { justify-content: center; }
.whale-info {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  flex-wrap: wrap;
  min-width: 0;
  text-align: left;
}
.whale-access {
  font-family: "JetBrains Mono", "Rajdhani", monospace;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--itu-cyan-hi);
  word-break: break-all;
}
.whale-access a { color: var(--itu-cyan-hi); }
.whale-access a:hover { color: var(--itu-text); }
.whale-timer {
  font-size: 0.8rem;
  color: var(--itu-muted);
  white-space: nowrap;
}
.whale-actions { display: flex; gap: 0.5rem; flex-shrink: 0; }
.whale-actions .btn, #whale-button-boot { box-shadow: none; }