/* ==============================================
   MTÜ MEZUNIYET YILLIK — 3D PREMIUM DARK THEME
   "Mezuniyet Gecesi" v2.0 — 3D Design System
   ============================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=Outfit:wght@400;600;700;800;900&display=swap');

/* ── CSS VARIABLES ── */
:root {
  --bg-primary:    #050810;
  --bg-secondary:  #0a0f1e;
  --bg-card:       rgba(255, 255, 255, 0.06);
  --bg-card-hover: rgba(255, 255, 255, 0.10);
  --bg-input:      rgba(255, 255, 255, 0.08);

  --mtu-orange:    #f26522;
  --mtu-blue:      #004b87;
  --accent-gold:   #f5c842;
  --accent-blue:   #4fa3e3;
  --accent-purple: #8b5cf6;
  --accent-teal:   #14b8a6;
  --accent-rose:   #f43f5e;

  --text-primary:  #f0f4ff;
  --text-secondary:#c8d4e8;
  --text-muted:    #8892a4;

  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-accent: rgba(242, 101, 34, 0.4);

  --gradient-main:   linear-gradient(135deg, #050810 0%, #0a0f1e 50%, #100520 100%);
  --gradient-card:   linear-gradient(135deg, rgba(255,255,255,0.08) 0%, rgba(255,255,255,0.03) 100%);
  --gradient-orange: linear-gradient(135deg, #f26522 0%, #f5c842 100%);
  --gradient-blue:   linear-gradient(135deg, #004b87 0%, #4fa3e3 100%);
  --gradient-purple: linear-gradient(135deg, #8b5cf6 0%, #06b6d4 100%);
  --gradient-gold:   linear-gradient(135deg, #f5c842 0%, #f26522 100%);

  --shadow-card:  0 8px 32px rgba(0, 0, 0, 0.5);
  --shadow-glow:  0 0 30px rgba(242, 101, 34, 0.3);
  --shadow-gold:  0 0 30px rgba(245, 200, 66, 0.25);
  --shadow-3d:    0 20px 60px rgba(0, 0, 0, 0.6), 0 10px 20px rgba(0, 0, 0, 0.4);

  --transition-fast:   0.15s ease;
  --transition-normal: 0.25s ease;
  --transition-slow:   0.4s ease;
  --transition-3d:     0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);

  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;

  --font-main: 'Inter', -apple-system, sans-serif;
  --font-display: 'Outfit', sans-serif;

  /* 3D perspective */
  --perspective: 1200px;
  --tilt-max: 10deg;
}

/* Light mode */
html.light-mode {
  --bg-primary:    #eef2ff;
  --bg-secondary:  #e0e8ff;
  --bg-card:       rgba(255, 255, 255, 0.92);
  --bg-card-hover: rgba(255, 255, 255, 1);
  --bg-input:      rgba(255, 255, 255, 0.95);
  --text-primary:  #1a1f2e;
  --text-secondary:#3d4a5c;
  --text-muted:    #6b7a8d;
  --border-subtle: rgba(0, 0, 0, 0.08);
  --gradient-main: linear-gradient(135deg, #eef2ff 0%, #e0e8ff 100%);
  --gradient-card: linear-gradient(135deg, rgba(255,255,255,0.95) 0%, rgba(240,244,255,0.8) 100%);
  --shadow-card:   0 8px 32px rgba(0, 75, 135, 0.15);
  --shadow-3d:     0 20px 60px rgba(0, 75, 135, 0.2), 0 10px 20px rgba(0, 75, 135, 0.1);
}

/* ── GLOBAL RESET ── */
*, *::before, *::after { box-sizing: border-box; }

html {
  font-size: 15px;
  scroll-behavior: smooth;
}

@media (min-width: 768px) { html { font-size: 16px; } }

body {
  font-family: var(--font-main);
  background: var(--bg-primary);
  color: var(--text-primary);
  margin: 0;
  padding-bottom: 80px;
  min-height: 100vh;
  background-image: var(--gradient-main);
  transition: background var(--transition-slow), color var(--transition-slow);
  overflow-x: hidden;
}

/* ── CANVAS 3D BACKGROUND ── */
#canvas-3d {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  pointer-events: none;
  z-index: 0;
  opacity: 0.6;
}

/* Floating gradient orbs */
body::before {
  content: '';
  position: fixed;
  top: -200px; left: -200px;
  width: 700px; height: 700px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(242,101,34,0.08) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
  animation: orbFloat1 15s ease-in-out infinite;
}

body::after {
  content: '';
  position: fixed;
  bottom: -200px; right: -200px;
  width: 600px; height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(79,163,227,0.07) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
  animation: orbFloat2 18s ease-in-out infinite;
}

@keyframes orbFloat1 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33%       { transform: translate(100px, 80px) scale(1.1); }
  66%       { transform: translate(-50px, 120px) scale(0.95); }
}

@keyframes orbFloat2 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33%       { transform: translate(-80px, -60px) scale(1.05); }
  66%       { transform: translate(60px, -100px) scale(1.1); }
}

/* ── SCROLLBAR ── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-secondary); }
::-webkit-scrollbar-thumb { background: var(--mtu-orange); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent-gold); }

::selection { background: rgba(242, 101, 34, 0.35); color: var(--text-primary); }

/* ── TYPOGRAPHY ── */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

a { color: var(--accent-blue); text-decoration: none; transition: color var(--transition-fast); }
a:hover { color: var(--mtu-orange); }
p { color: var(--text-secondary); margin-bottom: 1rem; }

/* ── 3D GLASS CARD ── */
.glass-card {
  background: var(--gradient-card);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-3d);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  position: relative;
  overflow: hidden;
  transform-style: preserve-3d;
  will-change: transform;
}

.glass-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.25), transparent);
  z-index: 1;
}

.glass-card::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg,
    rgba(255,255,255,0.06) 0%,
    transparent 50%,
    rgba(0,0,0,0.1) 100%);
  pointer-events: none;
  border-radius: inherit;
  z-index: 1;
}

/* 3D Tilt — applied via JS */
.tilt-card {
  transform-style: preserve-3d;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.tilt-card:hover {
  box-shadow: var(--shadow-3d), var(--shadow-glow);
}

/* ── BOOTSTRAP CARD OVERRIDES ── */
.card {
  background: var(--gradient-card) !important;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-subtle) !important;
  border-radius: var(--radius-md) !important;
  box-shadow: var(--shadow-3d) !important;
  color: var(--text-primary) !important;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  transform-style: preserve-3d;
}

.card:hover {
  box-shadow: 0 24px 60px rgba(0,0,0,0.6) !important;
}

.card-body { color: var(--text-primary); }
.card-title { color: var(--text-primary) !important; }

/* ── TOP HEADER ── */
.top-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(5, 8, 16, 0.85) !important;
  backdrop-filter: blur(24px) saturate(1.5);
  -webkit-backdrop-filter: blur(24px) saturate(1.5);
  border-bottom: 1px solid var(--border-subtle);
  padding: 10px 0;
  transition: background var(--transition-slow);
  box-shadow: 0 4px 30px rgba(0,0,0,0.4);
}

html.light-mode .top-header {
  background: rgba(238, 242, 255, 0.92) !important;
  border-bottom-color: rgba(0,0,0,0.08);
}

.navbar-brand {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.15rem;
  letter-spacing: -0.5px;
  background: var(--gradient-orange);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ── BOTTOM NAVBAR ── */
.bottom-navbar {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  z-index: 999;
  background: rgba(5, 8, 16, 0.95);
  backdrop-filter: blur(24px) saturate(1.5);
  -webkit-backdrop-filter: blur(24px);
  border-top: 1px solid var(--border-subtle);
  display: flex;
  justify-content: space-around;
  align-items: center;
  padding: 8px 0 12px;
  box-shadow: 0 -8px 32px rgba(0,0,0,0.4);
}

html.light-mode .bottom-navbar {
  background: rgba(238,242,255,0.97);
  border-top-color: rgba(0,0,0,0.1);
}

.bottom-navbar a {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  font-size: 0.62rem;
  font-weight: 600;
  color: var(--text-muted);
  text-decoration: none;
  padding: 4px 12px;
  border-radius: 12px;
  transition: all var(--transition-normal);
  position: relative;
}

.bottom-navbar a .nav-icon {
  font-size: 1.35rem;
  transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275),
              filter 0.3s ease;
}

.bottom-navbar a.active { color: var(--mtu-orange); }

.bottom-navbar a.active .nav-icon {
  transform: scale(1.2) translateY(-3px);
  filter: drop-shadow(0 0 10px rgba(242,101,34,0.8));
}

.bottom-navbar a:hover { color: var(--mtu-orange); }

.bottom-navbar a:hover .nav-icon {
  transform: scale(1.15) translateY(-4px);
}

/* ── BUTTONS ── */
.btn {
  font-family: var(--font-main);
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: all 0.25s ease;
  position: relative;
  overflow: hidden;
  transform-style: preserve-3d;
}

.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.15) 0%, transparent 50%);
  opacity: 0;
  transition: opacity 0.2s ease;
  border-radius: inherit;
}

.btn:hover::before { opacity: 1; }
.btn:active { transform: scale(0.97) translateY(1px); }

.btn-primary {
  background: var(--gradient-orange) !important;
  border: none !important;
  color: #fff !important;
  box-shadow: 0 4px 15px rgba(242, 101, 34, 0.5), 0 1px 0 rgba(255,255,255,0.2) inset;
}

.btn-primary:hover {
  box-shadow: 0 8px 25px rgba(242, 101, 34, 0.7), 0 1px 0 rgba(255,255,255,0.2) inset !important;
  transform: translateY(-2px) scale(1.02);
  color: #fff !important;
}

.btn-outline-primary {
  border: 1.5px solid var(--mtu-orange) !important;
  color: var(--mtu-orange) !important;
  background: transparent !important;
}

.btn-outline-primary:hover {
  background: rgba(242, 101, 34, 0.15) !important;
  box-shadow: 0 0 20px rgba(242, 101, 34, 0.35), inset 0 0 20px rgba(242, 101, 34, 0.05);
  transform: translateY(-1px);
}

.btn-light {
  background: rgba(255,255,255,0.1) !important;
  border: 1px solid var(--border-subtle) !important;
  color: var(--text-primary) !important;
  backdrop-filter: blur(8px);
}

.btn-light:hover {
  background: rgba(255,255,255,0.18) !important;
  color: var(--text-primary) !important;
  transform: translateY(-1px);
}

.btn-danger {
  background: linear-gradient(135deg, #dc2626, #f43f5e) !important;
  border: none !important;
  color: #fff !important;
  box-shadow: 0 4px 15px rgba(244, 63, 94, 0.4);
}

.btn-danger:hover { transform: translateY(-1px); box-shadow: 0 6px 20px rgba(244,63,94,0.6) !important; }

.btn-outline-secondary {
  border: 1.5px solid var(--border-subtle) !important;
  color: var(--text-muted) !important;
  background: transparent !important;
}
.btn-outline-secondary:hover {
  background: var(--bg-card-hover) !important;
  color: var(--text-primary) !important;
}

/* ── FORMS ── */
.form-control, .form-select {
  background: var(--bg-input) !important;
  border: 1.5px solid var(--border-subtle) !important;
  color: var(--text-primary) !important;
  border-radius: var(--radius-sm) !important;
  font-family: var(--font-main);
  transition: all var(--transition-normal);
}

.form-control::placeholder { color: var(--text-muted) !important; opacity: 0.7; }

.form-control:focus, .form-select:focus {
  background: rgba(255,255,255,0.12) !important;
  border-color: var(--mtu-orange) !important;
  box-shadow: 0 0 0 3px rgba(242, 101, 34, 0.2), 0 0 20px rgba(242,101,34,0.1) !important;
  color: var(--text-primary) !important;
  outline: none;
}

.form-select option { background: var(--bg-secondary); color: var(--text-primary); }
.form-label { color: var(--text-secondary); font-weight: 600; font-size: 0.88rem; margin-bottom: 6px; }
.input-group-text {
  background: var(--bg-input) !important;
  border: 1.5px solid var(--border-subtle) !important;
  color: var(--text-muted) !important;
}

/* ── BADGES ── */
.badge { font-family: var(--font-main); font-weight: 600; letter-spacing: 0.3px; }
.badge.bg-primary { background: var(--gradient-blue) !important; }
.badge.bg-danger  { background: linear-gradient(135deg, #dc2626, #f43f5e) !important; }
.badge.bg-success { background: linear-gradient(135deg, #059669, #10b981) !important; }
.badge.bg-light   { background: rgba(255,255,255,0.1) !important; color: var(--text-secondary) !important; border: 1px solid var(--border-subtle) !important; }
.badge.bg-warning { background: linear-gradient(135deg, #d97706, #f5c842) !important; color: #fff !important; }

/* ── MODALS ── */
.modal-content {
  background: rgba(10, 15, 35, 0.95) !important;
  border: 1px solid var(--border-subtle) !important;
  border-radius: var(--radius-lg) !important;
  color: var(--text-primary) !important;
  box-shadow: 0 40px 80px rgba(0,0,0,0.7) !important;
  backdrop-filter: blur(24px);
}

html.light-mode .modal-content { background: rgba(240,244,255,0.97) !important; }

.modal-header { border-bottom: 1px solid var(--border-subtle) !important; }
.modal-footer { border-top: 1px solid var(--border-subtle) !important; }
.modal-title { color: var(--text-primary) !important; }
.modal-backdrop { backdrop-filter: blur(6px); }
.btn-close { filter: invert(1) !important; opacity: 0.6 !important; }
html.light-mode .btn-close { filter: none !important; opacity: 0.7 !important; }

/* ── ALERTS ── */
.alert { border-radius: var(--radius-md) !important; border: 1px solid transparent !important; }
.alert-success { background: rgba(16, 185, 129, 0.15) !important; border-color: rgba(16, 185, 129, 0.3) !important; color: #6ee7b7 !important; }
.alert-danger  { background: rgba(244, 63, 94, 0.15) !important; border-color: rgba(244, 63, 94, 0.3) !important; color: #fda4af !important; }
.alert-info    { background: rgba(79, 163, 227, 0.12) !important; border-color: rgba(79, 163, 227, 0.3) !important; color: #93c5fd !important; }
.alert-warning { background: rgba(245, 200, 66, 0.12) !important; border-color: rgba(245, 200, 66, 0.3) !important; color: #fde68a !important; }

/* ── LIST GROUP ── */
.list-group-item { background: var(--bg-card) !important; border-color: var(--border-subtle) !important; color: var(--text-primary) !important; transition: background var(--transition-fast); }
.list-group-item:hover { background: var(--bg-card-hover) !important; }
.list-group-item-action:focus, .list-group-item-action:active { background: var(--bg-card-hover) !important; color: var(--text-primary) !important; }

/* ── NAV PILLS ── */
.nav-pills .nav-link { color: var(--text-muted) !important; border-radius: 50px !important; font-weight: 600; padding: 8px 18px; transition: all var(--transition-normal); }
.nav-pills .nav-link:hover { color: var(--text-primary) !important; background: rgba(255,255,255,0.06) !important; }
.nav-pills .nav-link.active, .nav-pills .show > .nav-link { background: var(--gradient-orange) !important; color: #fff !important; box-shadow: 0 4px 15px rgba(242,101,34,0.4); }

/* ── PAGINATION ── */
.page-link { background: var(--bg-card) !important; border: 1px solid var(--border-subtle) !important; color: var(--text-secondary) !important; border-radius: var(--radius-sm) !important; transition: all var(--transition-normal); }
.page-link:hover { background: rgba(242,101,34,0.2) !important; color: var(--mtu-orange) !important; border-color: var(--mtu-orange) !important; transform: translateY(-2px); }
.page-item.active .page-link { background: var(--gradient-orange) !important; border-color: transparent !important; color: #fff !important; box-shadow: 0 4px 12px rgba(242,101,34,0.5); }
.page-item.disabled .page-link { background: rgba(255,255,255,0.03) !important; color: var(--text-muted) !important; }

/* ── TABLES ── */
.table { color: var(--text-primary) !important; border-color: var(--border-subtle) !important; }
.table thead th { background: rgba(255,255,255,0.06) !important; color: var(--text-muted) !important; border-color: var(--border-subtle) !important; font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.5px; font-weight: 700; }
.table tbody tr { border-color: var(--border-subtle) !important; transition: background var(--transition-fast); }
.table tbody tr:hover { background: rgba(255,255,255,0.04) !important; }
.table tbody td { border-color: var(--border-subtle) !important; color: var(--text-secondary) !important; vertical-align: middle; }
.table-striped tbody tr:nth-of-type(odd) { background: rgba(255,255,255,0.02) !important; }

/* ── DROPDOWN ── */
.dropdown-menu { background: rgba(8, 12, 28, 0.97) !important; border: 1px solid var(--border-subtle) !important; border-radius: var(--radius-md) !important; box-shadow: 0 20px 60px rgba(0,0,0,0.6) !important; padding: 8px !important; backdrop-filter: blur(20px); }
html.light-mode .dropdown-menu { background: rgba(240,244,255,0.98) !important; }
.dropdown-item { color: var(--text-secondary) !important; border-radius: var(--radius-sm) !important; transition: all var(--transition-fast); font-weight: 500; }
.dropdown-item:hover, .dropdown-item:focus { background: rgba(242,101,34,0.12) !important; color: var(--mtu-orange) !important; transform: translateX(4px); }
.dropdown-divider { border-color: var(--border-subtle) !important; margin: 6px 0 !important; }

/* ── PROGRESS BAR ── */
.progress { background: rgba(255,255,255,0.08) !important; border-radius: 50px !important; height: 6px !important; }
.progress-bar { background: var(--gradient-orange) !important; border-radius: 50px !important; }

/* ── 3D POST CARDS ── */
.post-card {
  background: var(--gradient-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-3d);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  overflow: hidden;
  margin-bottom: 20px;
  transform-style: preserve-3d;
  position: relative;
}

.post-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
}

.post-card:hover {
  border-color: rgba(242, 101, 34, 0.25);
  box-shadow:
    0 30px 70px rgba(0,0,0,0.6),
    0 0 30px rgba(242,101,34,0.15),
    inset 0 1px 0 rgba(255,255,255,0.1);
}

/* Like button pop */
@keyframes heartPop {
  0%   { transform: scale(1); }
  30%  { transform: scale(1.5) rotate(-10deg); }
  60%  { transform: scale(0.9); }
  100% { transform: scale(1); }
}

.hit-icon.animate { animation: heartPop 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275); }

/* Comment section */
.comments-section {
  background: rgba(0,0,0,0.2) !important;
  border-top: 1px solid var(--border-subtle) !important;
}
html.light-mode .comments-section { background: rgba(0,0,0,0.03) !important; }

/* ── 3D YEARBOOK CARDS ── */
.yearbook-card {
  background: var(--gradient-card);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  overflow: hidden;
  cursor: pointer;
  transform-style: preserve-3d;
  position: relative;
}

.yearbook-card::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.06) 0%, transparent 60%);
  border-radius: inherit;
  pointer-events: none;
}

.yearbook-card:hover {
  transform: translateY(-12px) perspective(800px) rotateX(4deg);
  border-color: rgba(245,200,66,0.5);
  box-shadow:
    0 30px 60px rgba(0,0,0,0.6),
    0 0 40px rgba(245,200,66,0.2),
    inset 0 1px 0 rgba(255,255,255,0.15);
}

/* ── NOTEBOOK (YEARBOOK DETAIL) ── */
.notebook-page {
  border-left: 4px solid var(--mtu-orange);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: 24px 28px 28px 36px;
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(12px);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
  border-right: 1px solid var(--border-subtle);
  transition: all var(--transition-normal);
  background:
    linear-gradient(to bottom, rgba(255,248,220,0.06) 0%, rgba(255,240,180,0.03) 100%),
    repeating-linear-gradient(transparent, transparent 31px, rgba(255,255,255,0.04) 31px, rgba(255,255,255,0.04) 32px);
  background-position: 0 10px;
  box-shadow: 4px 0 20px rgba(0,0,0,0.2), var(--shadow-3d);
}

.notebook-page:hover {
  border-left-color: var(--accent-gold);
  transform: perspective(800px) rotateY(2deg) translateX(4px);
  box-shadow: -8px 8px 30px rgba(0,0,0,0.4), var(--shadow-gold);
}

.notebook-page::before {
  content: '';
  position: absolute;
  top: 0; bottom: 0;
  left: 28px;
  width: 1px;
  background: rgba(79,163,227,0.15);
}

.notebook-text {
  font-family: 'Segoe Print', 'Comic Sans MS', cursive, sans-serif;
  font-size: 1.05rem;
  line-height: 32px;
  color: var(--text-secondary);
  white-space: pre-wrap;
}
html.light-mode .notebook-text { color: #4a4a4a; }

/* ── 3D COUNTDOWN WIDGET ── */
.countdown-widget {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
  perspective: 600px;
}

.countdown-unit {
  background: var(--gradient-card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  text-align: center;
  min-width: 76px;
  transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  box-shadow: 0 8px 24px rgba(0,0,0,0.3), inset 0 1px 0 rgba(255,255,255,0.1);
  transform-style: preserve-3d;
  position: relative;
}

.countdown-unit::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: linear-gradient(135deg, rgba(255,255,255,0.06) 0%, transparent 50%);
  pointer-events: none;
}

.countdown-unit:hover {
  transform: perspective(400px) rotateX(-10deg) translateY(-6px);
  border-color: rgba(245,200,66,0.5);
  box-shadow: 0 16px 40px rgba(0,0,0,0.5), 0 0 20px rgba(245,200,66,0.2), inset 0 1px 0 rgba(255,255,255,0.15);
}

.countdown-unit .cd-number {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 900;
  background: var(--gradient-gold);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  transform: translateZ(10px);
  display: block;
  text-shadow: none;
}

.countdown-unit .cd-label {
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--text-muted);
  margin-top: 6px;
}

/* ── AVATAR ── */
.avatar-initials {
  background: var(--gradient-blue);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 700;
  border-radius: 50%;
  box-shadow: 0 4px 12px rgba(0,0,0,0.3);
}

.avatar-ring {
  border: 2px solid var(--mtu-orange) !important;
  box-shadow: 0 0 0 1px rgba(242,101,34,0.4), 0 0 16px rgba(242,101,34,0.3);
}

.avatar-ring-gold {
  border: 2px solid var(--accent-gold) !important;
  box-shadow: 0 0 0 1px rgba(245,200,66,0.4), 0 0 16px rgba(245,200,66,0.3);
}

/* ── GRADIENT TEXT ── */
.gradient-text {
  background: var(--gradient-orange);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.gradient-text-blue {
  background: var(--gradient-blue);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.gradient-text-gold {
  background: var(--gradient-gold);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ── DIVIDERS ── */
hr { border-color: var(--border-subtle) !important; opacity: 1; }
.border-top    { border-top: 1px solid var(--border-subtle) !important; }
.border-bottom { border-bottom: 1px solid var(--border-subtle) !important; }
.border        { border: 1px solid var(--border-subtle) !important; }

/* ── 3D SCROLL ANIMATIONS ── */
.fade-in-up {
  opacity: 0;
  transform: translateY(30px) scale(0.98);
  transition: opacity 0.6s ease, transform 0.6s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.fade-in-up.visible {
  opacity: 1;
  transform: translateY(0) scale(1);
}

/* ── GLOW EFFECTS ── */
.glow-orange { box-shadow: 0 0 20px rgba(242,101,34,0.4) !important; }
.glow-gold   { box-shadow: 0 0 20px rgba(245,200,66,0.4) !important; }
.glow-blue   { box-shadow: 0 0 20px rgba(79,163,227,0.4) !important; }

/* ── IMAGE ── */
.object-fit-cover { object-fit: cover; }

/* ── TEXT UTILITIES ── */
.text-muted     { color: var(--text-muted) !important; }
.text-dark      { color: var(--text-primary) !important; }
.text-secondary { color: var(--text-secondary) !important; }

/* ── BG UTILITIES ── */
.bg-light { background: rgba(255,255,255,0.06) !important; }
.bg-white { background: rgba(255,255,255,0.08) !important; }
html.light-mode .bg-light { background: rgba(240,244,255,0.8) !important; }
html.light-mode .bg-white { background: rgba(255,255,255,0.95) !important; }

/* ── SPINNER ── */
.spinner-border { color: var(--mtu-orange) !important; }

/* ── SHADOW ── */
.shadow-sm { box-shadow: 0 2px 8px rgba(0,0,0,0.3) !important; }
.shadow    { box-shadow: 0 4px 16px rgba(0,0,0,0.4) !important; }
.shadow-lg { box-shadow: 0 8px 32px rgba(0,0,0,0.5) !important; }

/* ── VIEW TRANSITION ── */
::view-transition-old(root) { animation: none; }
::view-transition-new(root) { animation: none; }

/* ── 3D RADYO POPUP ── */
#studentRadioPopup {
  position: fixed;
  bottom: 90px; right: 16px;
  z-index: 1050;
  width: 290px;
  background: rgba(5, 8, 16, 0.97);
  backdrop-filter: blur(24px);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-lg);
  box-shadow:
    0 20px 60px rgba(0,0,0,0.7),
    var(--shadow-glow),
    inset 0 1px 0 rgba(255,255,255,0.08);
  padding: 20px;
  animation: slideInUp3D 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  transform-style: preserve-3d;
}

html.light-mode #studentRadioPopup { background: rgba(238,242,255,0.97); border-color: rgba(242,101,34,0.3); }

@keyframes slideInUp3D {
  from { opacity: 0; transform: translateY(30px) perspective(800px) rotateX(10deg); }
  to   { opacity: 1; transform: translateY(0) perspective(800px) rotateX(0deg); }
}

/* Radio wave */
.radio-wave { display: inline-flex; align-items: flex-end; gap: 2px; height: 20px; }
.radio-wave span { width: 3px; background: var(--mtu-orange); border-radius: 2px; animation: wave 1.2s ease-in-out infinite; }
.radio-wave span:nth-child(1) { animation-delay: 0s; height: 6px; }
.radio-wave span:nth-child(2) { animation-delay: 0.15s; height: 14px; }
.radio-wave span:nth-child(3) { animation-delay: 0.3s; height: 10px; }
.radio-wave span:nth-child(4) { animation-delay: 0.45s; height: 18px; }
.radio-wave span:nth-child(5) { animation-delay: 0.6s; height: 8px; }
@keyframes wave {
  0%, 100% { transform: scaleY(0.4); opacity: 0.6; }
  50%       { transform: scaleY(1);   opacity: 1; }
}

/* ── PULL TO REFRESH ── */
#ptr-loader {
  height: 0;
  overflow: hidden;
  background: var(--bg-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: height 0.15s ease;
  border-bottom: 1px solid var(--border-subtle);
}

#ptr-loader span { font-size: 0.8rem; font-weight: 600; color: var(--text-muted); margin-left: 10px; }

/* ── 3D FLOATING RADIO BUTTON ── */
.radio-fab {
  position: fixed;
  bottom: 90px; left: 16px;
  width: 52px; height: 52px;
  border-radius: 50%;
  background: var(--gradient-orange);
  border: none;
  color: white;
  font-size: 1.3rem;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  box-shadow: 0 6px 24px rgba(242,101,34,0.6), 0 2px 8px rgba(0,0,0,0.4);
  z-index: 998;
  transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  animation: pulseRadio 2.5s ease-in-out infinite;
  transform-style: preserve-3d;
}

.radio-fab:hover {
  transform: scale(1.15) translateY(-4px);
  box-shadow: 0 12px 32px rgba(242,101,34,0.8), 0 0 40px rgba(242,101,34,0.4);
}

@keyframes pulseRadio {
  0%, 100% { box-shadow: 0 6px 24px rgba(242,101,34,0.6), 0 0 0 0 rgba(242,101,34,0.4); }
  50%       { box-shadow: 0 6px 24px rgba(242,101,34,0.6), 0 0 0 10px rgba(242,101,34,0); }
}

/* ── NOTIFICATION BADGE ── */
.notif-badge {
  position: absolute;
  top: -4px; right: -4px;
  min-width: 18px; height: 18px;
  background: var(--accent-rose);
  color: #fff;
  border-radius: 50px;
  font-size: 0.65rem;
  font-weight: 700;
  display: flex; align-items: center; justify-content: center;
  border: 2px solid var(--bg-primary);
  box-shadow: 0 2px 8px rgba(244,63,94,0.6), 0 0 12px rgba(244,63,94,0.3);
  animation: bounceIn 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

@keyframes bounceIn {
  0%   { transform: scale(0) rotate(-45deg); }
  70%  { transform: scale(1.3) rotate(5deg); }
  100% { transform: scale(1) rotate(0deg); }
}

/* ── SCROLL TO TOP ── */
#scrollToTopBtn {
  position: fixed;
  bottom: 90px; right: 16px;
  width: 48px; height: 48px;
  border-radius: 50%;
  background: var(--gradient-orange);
  border: none;
  color: #fff;
  font-size: 1.2rem;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  z-index: 990;
  box-shadow: 0 6px 20px rgba(242,101,34,0.5), 0 2px 8px rgba(0,0,0,0.3);
  opacity: 0;
  transform: translateY(20px) scale(0.8);
  transition: opacity 0.3s ease, transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  pointer-events: none;
}

#scrollToTopBtn.visible {
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: all;
}

#scrollToTopBtn:hover {
  transform: translateY(-4px) scale(1.1);
  box-shadow: 0 10px 30px rgba(242,101,34,0.7);
}

/* ── DAILY QUOTE CARD ── */
.quote-card {
  background: linear-gradient(135deg,
    rgba(242,101,34,0.08) 0%,
    rgba(245,200,66,0.06) 50%,
    rgba(139,92,246,0.06) 100%);
  border: 1px solid rgba(245,200,66,0.2);
  border-radius: var(--radius-lg);
  padding: 20px 24px;
  position: relative;
  overflow: hidden;
  box-shadow: 0 8px 24px rgba(0,0,0,0.2), inset 0 1px 0 rgba(255,255,255,0.06);
}

.quote-card::before {
  content: '\201C';
  position: absolute;
  top: -16px; left: 16px;
  font-size: 6rem;
  color: rgba(245,200,66,0.12);
  font-family: serif;
  line-height: 1;
  pointer-events: none;
}

.quote-text { font-size: 0.93rem; font-style: italic; color: var(--text-secondary); line-height: 1.7; padding-left: 8px; margin: 0; }
.quote-author { font-size: 0.78rem; font-weight: 700; color: var(--accent-gold); margin-top: 8px; padding-left: 8px; margin-bottom: 0; }

/* ── GREETING BANNER ── */
.greeting-banner {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  padding: 12px 20px;
  border-radius: var(--radius-lg);
  background: var(--gradient-card);
  border: 1px solid var(--border-subtle);
  display: flex; align-items: center; gap: 10px;
  color: var(--text-primary);
  backdrop-filter: blur(12px);
  box-shadow: 0 4px 16px rgba(0,0,0,0.2);
}

/* ── TOAST ── */
.toast-container-custom {
  position: fixed;
  top: 70px; right: 16px;
  z-index: 9999;
  display: flex; flex-direction: column; gap: 8px;
  pointer-events: none;
}

.toast-custom {
  background: rgba(8, 12, 28, 0.96);
  border: 1px solid var(--border-subtle);
  border-left: 4px solid var(--mtu-orange);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  min-width: 240px; max-width: 320px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.5);
  font-size: 0.88rem;
  color: var(--text-primary);
  font-weight: 500;
  animation: toastIn 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  pointer-events: all;
  backdrop-filter: blur(12px);
}

.toast-custom.success { border-left-color: var(--accent-teal); }
.toast-custom.error   { border-left-color: var(--accent-rose); }

@keyframes toastIn {
  from { opacity: 0; transform: translateX(60px) perspective(400px) rotateY(20deg); }
  to   { opacity: 1; transform: translateX(0) perspective(400px) rotateY(0deg); }
}

/* ── 3D SOCIAL LINKS ── */
.social-btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 7px 14px;
  border-radius: 50px;
  font-size: 0.82rem; font-weight: 600;
  border: 1.5px solid var(--border-subtle);
  color: var(--text-secondary);
  background: var(--bg-card);
  transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  text-decoration: none;
  backdrop-filter: blur(8px);
}

.social-btn:hover {
  transform: translateY(-4px) scale(1.05);
  color: #fff;
  box-shadow: 0 8px 24px rgba(0,0,0,0.4);
}

.social-btn.github:hover   { background: #1a1a2e; border-color: #555; color: #fff; box-shadow: 0 8px 24px rgba(0,0,0,0.5); }
.social-btn.linkedin:hover { background: #0077b5; border-color: #0077b5; box-shadow: 0 8px 24px rgba(0,119,181,0.5); }
.social-btn.instagram:hover {
  background: linear-gradient(135deg, #833ab4, #fd1d1d, #fcb045);
  border-color: transparent;
  box-shadow: 0 8px 24px rgba(253,29,29,0.4);
}

/* ── SKILL TAGS ── */
.skill-tag {
  display: inline-block;
  background: rgba(242,101,34,0.1);
  border: 1px solid rgba(242,101,34,0.25);
  color: var(--mtu-orange);
  border-radius: 50px;
  padding: 4px 12px;
  font-size: 0.78rem; font-weight: 600;
  transition: all 0.25s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.skill-tag:hover {
  background: rgba(242,101,34,0.2);
  transform: translateY(-2px) scale(1.05);
  box-shadow: 0 4px 12px rgba(242,101,34,0.3);
}

/* ── SEARCH INPUT ── */
.search-input-wrapper { position: relative; }
.search-input-wrapper .search-icon { position: absolute; left: 14px; top: 50%; transform: translateY(-50%); color: var(--text-muted); pointer-events: none; font-size: 1rem; }
.search-input-wrapper input { padding-left: 42px !important; }

/* ── HOVER CARD ── */
.hover-card { transition: transform 0.3s ease, box-shadow 0.3s ease !important; }
.hover-card:hover { transform: translateY(-8px) perspective(800px) rotateX(3deg) !important; box-shadow: 0 24px 50px rgba(0,0,0,0.5), 0 0 30px rgba(245,200,66,0.15) !important; }

/* ── ADMIN STAT CARDS ── */
.admin-stat-card { border-radius: var(--radius-md); padding: 20px; text-align: center; position: relative; overflow: hidden; transition: all 0.3s ease; }
.admin-stat-card:hover { transform: translateY(-4px) perspective(600px) rotateX(5deg); }
.admin-stat-card::after { content: ''; position: absolute; bottom: 0; left: 0; right: 0; height: 3px; }
.admin-stat-card.orange::after { background: var(--gradient-orange); }
.admin-stat-card.blue::after   { background: var(--gradient-blue); }
.admin-stat-card.green::after  { background: linear-gradient(135deg, #059669, #10b981); }
.admin-stat-card.red::after    { background: linear-gradient(135deg, #dc2626, #f43f5e); }

.stat-number {
  font-family: var(--font-display); font-size: 2.2rem; font-weight: 900;
  background: var(--gradient-orange);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
  line-height: 1; margin-bottom: 4px;
}

.stat-label { color: var(--text-muted); font-size: 0.76rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.5px; }

/* ── TOOLTIP ── */
.tooltip-inner { background: var(--bg-secondary); color: var(--text-primary); border: 1px solid var(--border-subtle); border-radius: var(--radius-sm); }

/* ── UTILITY ── */
.rounded-pill { border-radius: 50px !important; }
.fw-bold { font-weight: 700 !important; }
.box-shadow { box-shadow: var(--shadow-3d); }
.transition { transition: all var(--transition-normal); }
.min-w-0 { min-width: 0; }

/* ── RESPONSIVE ── */
@media (min-width: 768px) {
  #scrollToTopBtn { right: calc(50% - 380px); }
  .toast-container-custom { right: calc(50% - 380px); }
}
/* ── RENK TEMA SİSTEMİ ──────────────────────────────── */
html[data-theme='blue']   { --mtu-orange:#4fa3e3; --accent-gold:#60c8ff; --gradient-orange:linear-gradient(135deg,#004b87,#4fa3e3); --shadow-glow:0 0 30px rgba(79,163,227,0.3); }
html[data-theme='purple'] { --mtu-orange:#8b5cf6; --accent-gold:#a78bfa; --gradient-orange:linear-gradient(135deg,#7c3aed,#8b5cf6); --shadow-glow:0 0 30px rgba(139,92,246,0.3); }
html[data-theme='teal']   { --mtu-orange:#14b8a6; --accent-gold:#2dd4bf; --gradient-orange:linear-gradient(135deg,#0f766e,#14b8a6); --shadow-glow:0 0 30px rgba(20,184,166,0.3); }
html[data-theme='rose']   { --mtu-orange:#f43f5e; --accent-gold:#fb7185; --gradient-orange:linear-gradient(135deg,#e11d48,#f43f5e); --shadow-glow:0 0 30px rgba(244,63,94,0.3); }
html[data-theme='gold']   { --mtu-orange:#f5c842; --accent-gold:#fde68a; --gradient-orange:linear-gradient(135deg,#d97706,#f5c842); --shadow-glow:0 0 30px rgba(245,200,66,0.3); }

.theme-picker { display:flex; gap:8px; flex-wrap:wrap; }
.theme-dot { width:26px; height:26px; border-radius:50%; cursor:pointer; border:2px solid transparent; transition:all 0.25s ease; box-shadow:0 2px 8px rgba(0,0,0,0.4); flex-shrink:0; }
.theme-dot:hover { transform:scale(1.25); }
.theme-dot.active { border-color:#fff; box-shadow:0 0 0 3px rgba(255,255,255,0.3), 0 2px 8px rgba(0,0,0,0.4); transform:scale(1.15); }

/* ── EMOJI REAKSİYONLAR ─────────────────────────────── */
.reaction-bar { display:flex; gap:6px; flex-wrap:wrap; padding:8px 16px; border-top:1px solid var(--border-subtle); }
.reaction-btn {
  background:rgba(255,255,255,0.06);
  border:1px solid var(--border-subtle);
  border-radius:50px;
  padding:4px 10px;
  font-size:0.82rem;
  cursor:pointer;
  transition:all 0.2s ease;
  color:var(--text-secondary);
  display:inline-flex; align-items:center; gap:4px;
}
.reaction-btn:hover { background:rgba(255,255,255,0.12); transform:scale(1.1) translateY(-2px); }
.reaction-btn.active { border-color:var(--mtu-orange); background:rgba(242,101,34,0.15); color:var(--mtu-orange); }
.reaction-btn .r-count { font-weight:700; font-size:0.75rem; }

/* ── ROZET SİSTEMİ ──────────────────────────────────── */
.badge-item {
  display:inline-flex; align-items:center; gap:6px;
  background:rgba(255,255,255,0.06);
  border:1px solid var(--border-subtle);
  border-radius:50px;
  padding:4px 12px;
  font-size:0.78rem; font-weight:600;
  transition:all 0.2s ease;
}
.badge-item:hover { transform:translateY(-2px); box-shadow:0 4px 12px rgba(0,0,0,0.3); }

/* ── ETKİNLİK TAKVİMİ ───────────────────────────────── */
.event-card {
  background:var(--gradient-card);
  border:1px solid var(--border-subtle);
  border-left:4px solid var(--mtu-orange);
  border-radius:var(--radius-md);
  padding:16px 20px;
  transition:all 0.25s ease;
  position:relative;
}
.event-card:hover { transform:translateX(4px); box-shadow:var(--shadow-3d); }

/* ── MESAJLAŞMA ─────────────────────────────────────── */
.message-bubble {
  max-width:75%;
  padding:10px 14px;
  border-radius:18px;
  font-size:0.88rem;
  line-height:1.5;
  position:relative;
  word-break:break-word;
}
.message-bubble.sent {
  background:var(--gradient-orange);
  color:#fff;
  border-bottom-right-radius:4px;
  margin-left:auto;
}
.message-bubble.received {
  background:rgba(255,255,255,0.08);
  border:1px solid var(--border-subtle);
  color:var(--text-primary);
  border-bottom-left-radius:4px;
}

/* ── OYLAMA (SUPERLATIVE) ───────────────────────────── */
.superlative-card {
  background:var(--gradient-card);
  border:1px solid var(--border-subtle);
  border-radius:var(--radius-lg);
  padding:20px;
  text-align:center;
  transition:all 0.3s ease;
}
.superlative-card:hover { transform:translateY(-4px); box-shadow:var(--shadow-3d), var(--shadow-gold); border-color:rgba(245,200,66,0.3); }

/* ── ANKET ──────────────────────────────────────────── */
.poll-option {
  background:rgba(255,255,255,0.05);
  border:1px solid var(--border-subtle);
  border-radius:50px;
  padding:10px 18px;
  cursor:pointer;
  transition:all 0.2s ease;
  position:relative;
  overflow:hidden;
  text-align:left;
}
.poll-option:hover { background:rgba(242,101,34,0.1); border-color:rgba(242,101,34,0.3); }
.poll-option.voted { border-color:var(--mtu-orange); }
.poll-bar { position:absolute; left:0; top:0; bottom:0; background:rgba(242,101,34,0.15); transition:width 0.6s ease; border-radius:50px; }
.poll-text { position:relative; z-index:1; font-size:0.88rem; font-weight:600; color:var(--text-primary); }
.poll-pct  { position:relative; z-index:1; font-size:0.78rem; font-weight:700; color:var(--mtu-orange); margin-left:auto; }

/* ── DM KONUŞMA LİSTESİ ─────────────────────────────── */
.conversation-item {
  display:flex; align-items:center; gap:12px;
  padding:12px 16px;
  border-radius:var(--radius-md);
  cursor:pointer;
  transition:all 0.2s ease;
  border:1px solid transparent;
}
.conversation-item:hover { background:var(--bg-card-hover); border-color:var(--border-subtle); }
.conversation-item.unread .conv-name { color:var(--text-primary); font-weight:700; }
.conv-name { font-size:0.88rem; font-weight:600; color:var(--text-secondary); }
.conv-preview { font-size:0.75rem; color:var(--text-muted); white-space:nowrap; overflow:hidden; text-overflow:ellipsis; }