/* ============================================
   ASSIGNTRACK — Global Stylesheet
   Dark Glassmorphism Theme | Drix Tech
============================================ */

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

/* ── CSS Variables ── */
:root {
  --bg-dark: #0a0e1a;
  --bg-card: rgba(255, 255, 255, 0.05);
  --bg-card-hover: rgba(255, 255, 255, 0.09);
  --border-glass: rgba(255, 255, 255, 0.12);
  --accent-blue: #3b82f6;
  --accent-cyan: #06b6d4;
  --accent-green: #10b981;
  --accent-yellow: #f59e0b;
  --accent-red: #ef4444;
  --text-primary: #f0f4ff;
  --text-muted: #8892a4;
  --gradient-hero: linear-gradient(135deg, #0a0e1a 0%, #0f1e3d 50%, #0a1628 100%);
  --gradient-btn: linear-gradient(135deg, #3b82f6, #06b6d4);
  --shadow-glow: 0 0 30px rgba(59, 130, 246, 0.15);
  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
  --radius: 16px;
  --transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ── Reset & Base ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: 'DM Sans', sans-serif;
  background: var(--bg-dark);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: 'Syne', sans-serif;
  font-weight: 700;
}

/* ── Animated Background ── */
body::before {
  content: '';
  position: fixed;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background:
    radial-gradient(ellipse at 20% 20%, rgba(59, 130, 246, 0.08) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 80%, rgba(6, 182, 212, 0.06) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 50%, rgba(16, 185, 129, 0.04) 0%, transparent 60%);
  animation: bgFloat 12s ease-in-out infinite alternate;
  pointer-events: none;
  z-index: 0;
}

@keyframes bgFloat {
  0%   { transform: translate(0, 0) rotate(0deg); }
  100% { transform: translate(2%, 2%) rotate(1deg); }
}

/* ── Navbar ── */
.navbar {
  background: rgba(10, 14, 26, 0.85) !important;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-glass);
  padding: 14px 32px;
  position: sticky;
  top: 0;
  z-index: 1000;
  animation: slideDown 0.6s ease forwards;
}

@keyframes slideDown {
  from { transform: translateY(-100%); opacity: 0; }
  to   { transform: translateY(0);     opacity: 1; }
}

.navbar-brand {
  font-family: 'Syne', sans-serif;
  font-size: 1.5rem;
  font-weight: 800;
  background: var(--gradient-btn);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.5px;
}

/* ── Buttons ── */
.btn-primary {
  background: var(--gradient-btn) !important;
  border: none !important;
  border-radius: 10px !important;
  font-family: 'Syne', sans-serif;
  font-weight: 600;
  letter-spacing: 0.3px;
  padding: 10px 24px;
  position: relative;
  overflow: hidden;
  transition: var(--transition);
  box-shadow: 0 4px 20px rgba(59, 130, 246, 0.3);
}

.btn-primary::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0.12);
  transform: translateX(-100%);
  transition: transform 0.4s ease;
}

.btn-primary:hover::after { transform: translateX(0); }

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(59, 130, 246, 0.45) !important;
}

.btn-outline-light {
  border: 1px solid var(--border-glass) !important;
  color: var(--text-primary) !important;
  border-radius: 10px !important;
  font-family: 'Syne', sans-serif;
  font-weight: 600;
  transition: var(--transition);
  backdrop-filter: blur(10px);
}

.btn-outline-light:hover {
  background: var(--bg-card-hover) !important;
  border-color: var(--accent-blue) !important;
  transform: translateY(-2px);
}

.btn-outline-danger {
  border-color: var(--accent-red) !important;
  color: var(--accent-red) !important;
  border-radius: 8px !important;
  transition: var(--transition);
}

.btn-outline-danger:hover {
  background: var(--accent-red) !important;
  color: white !important;
  transform: scale(1.03);
}

/* ── Glass Cards ── */
.card {
  background: var(--bg-card) !important;
  border: 1px solid var(--border-glass) !important;
  border-radius: var(--radius) !important;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: var(--shadow-card);
  color: var(--text-primary) !important;
  transition: var(--transition);
}

.card:hover {
  background: var(--bg-card-hover) !important;
  border-color: rgba(59, 130, 246, 0.3) !important;
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow), var(--shadow-card);
}

/* ── Hero Section ── */
.hero {
  background: var(--gradient-hero);
  padding: 120px 20px 100px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 10%;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(ellipse, rgba(59,130,246,0.12) 0%, transparent 70%);
  border-radius: 50%;
  animation: pulse 4s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { transform: translateX(-50%) scale(1);   opacity: 0.8; }
  50%       { transform: translateX(-50%) scale(1.1); opacity: 1;   }
}

.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  font-weight: 800;
  background: linear-gradient(135deg, #ffffff 0%, #93c5fd 50%, #06b6d4 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: fadeUp 0.8s ease forwards;
  line-height: 1.15;
}

.hero p {
  color: var(--text-muted);
  font-size: 1.15rem;
  max-width: 560px;
  margin: 16px auto 0;
  animation: fadeUp 0.8s 0.2s ease both;
}

.hero .btn { animation: fadeUp 0.8s 0.4s ease both; }

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(30px); }
  to   { opacity: 1; transform: translateY(0);    }
}

/* ── Section Titles ── */
.section-title {
  font-size: 1.9rem;
  font-weight: 800;
  text-align: center;
  margin-bottom: 2rem;
  background: linear-gradient(135deg, #f0f4ff, #93c5fd);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ── Urgency Badges ── */
.badge-urgent {
  background: rgba(239, 68, 68, 0.15);
  color: var(--accent-red);
  border: 1px solid rgba(239, 68, 68, 0.35);
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.78rem;
  font-weight: 600;
  animation: badgePulse 2s ease-in-out infinite;
}

@keyframes badgePulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(239,68,68,0.3); }
  50%       { box-shadow: 0 0 0 6px rgba(239,68,68,0); }
}

.badge-upcoming {
  background: rgba(245, 158, 11, 0.15);
  color: var(--accent-yellow);
  border: 1px solid rgba(245, 158, 11, 0.35);
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.78rem;
  font-weight: 600;
}

.badge-ontrack {
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent-green);
  border: 1px solid rgba(16, 185, 129, 0.35);
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.78rem;
  font-weight: 600;
}

/* ── Assignment Cards Urgency Borders ── */
.card.border-danger {
  border-color: rgba(239, 68, 68, 0.4) !important;
  box-shadow: 0 0 20px rgba(239,68,68,0.1), var(--shadow-card);
}

.card.border-warning {
  border-color: rgba(245, 158, 11, 0.4) !important;
  box-shadow: 0 0 20px rgba(245,158,11,0.1), var(--shadow-card);
}

.card.border-success {
  border-color: rgba(16, 185, 129, 0.4) !important;
  box-shadow: 0 0 20px rgba(16,185,129,0.1), var(--shadow-card);
}

/* ── Forms ── */
.form-control, .form-select {
  background: rgba(255,255,255,0.06) !important;
  border: 1px solid var(--border-glass) !important;
  color: var(--text-primary) !important;
  border-radius: 10px !important;
  padding: 12px 16px;
  font-family: 'DM Sans', sans-serif;
  transition: var(--transition);
}

.form-control:focus, .form-select:focus {
  background: rgba(255,255,255,0.1) !important;
  border-color: var(--accent-blue) !important;
  box-shadow: 0 0 0 3px rgba(59,130,246,0.2) !important;
  outline: none !important;
}

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

.form-label {
  color: var(--text-muted);
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 6px;
  letter-spacing: 0.3px;
}

.form-select option {
  background: #0f1e3d;
  color: var(--text-primary);
}

/* ── Auth Pages (Login & Register) ── */
.auth-wrapper {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px 16px;
  background: var(--gradient-hero);
}

.auth-card {
  width: 100%;
  max-width: 460px;
  animation: scaleIn 0.5s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}

@keyframes scaleIn {
  from { opacity: 0; transform: scale(0.92); }
  to   { opacity: 1; transform: scale(1);    }
}

.auth-card .card-body { padding: 40px !important; }

.auth-logo {
  font-family: 'Syne', sans-serif;
  font-size: 1.8rem;
  font-weight: 800;
  background: var(--gradient-btn);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-align: center;
  margin-bottom: 8px;
}

/* ── Dashboard ── */
.dashboard-header {
  background: rgba(255,255,255,0.03);
  border-bottom: 1px solid var(--border-glass);
  padding: 20px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.user-pill {
  background: rgba(59,130,246,0.12);
  border: 1px solid rgba(59,130,246,0.25);
  border-radius: 50px;
  padding: 6px 16px;
  font-size: 0.85rem;
  color: var(--accent-cyan);
  font-weight: 500;
}

/* ── Admin Stats Cards ── */
.stat-card {
  border-radius: var(--radius) !important;
  padding: 28px !important;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.stat-card::before {
  content: '';
  position: absolute;
  top: -40%;
  right: -20%;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: rgba(255,255,255,0.05);
}

.stat-card h2 {
  font-size: 2.8rem;
  font-weight: 800;
  margin: 8px 0 0;
}

.stat-card h6 {
  font-size: 0.8rem;
  letter-spacing: 1px;
  text-transform: uppercase;
  opacity: 0.75;
}

.stat-card.blue  { background: linear-gradient(135deg, rgba(59,130,246,0.25), rgba(59,130,246,0.08)) !important; border-color: rgba(59,130,246,0.3) !important; }
.stat-card.green { background: linear-gradient(135deg, rgba(16,185,129,0.25), rgba(16,185,129,0.08)) !important; border-color: rgba(16,185,129,0.3) !important; }

/* ── Table ── */
.table {
  color: var(--text-primary) !important;
  border-color: var(--border-glass) !important;
}

.table thead th {
  background: rgba(59,130,246,0.12) !important;
  color: var(--accent-cyan) !important;
  font-family: 'Syne', sans-serif;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  border-color: var(--border-glass) !important;
  padding: 14px 16px;
}

.table tbody tr {
  border-color: var(--border-glass) !important;
  transition: var(--transition);
}

.table tbody tr:hover { background: rgba(255,255,255,0.03) !important; }
.table tbody td { padding: 14px 16px; vertical-align: middle; border-color: var(--border-glass) !important; }

/* ── Chart Container ── */
.chart-container {
  background: rgba(255,255,255,0.02);
  border-radius: 12px;
  padding: 20px;
}

/* ── Alert ── */
.alert {
  border-radius: 10px !important;
  font-size: 0.9rem;
  border: 1px solid transparent !important;
}

.alert-danger  { background: rgba(239,68,68,0.12)  !important; border-color: rgba(239,68,68,0.3)  !important; color: #fca5a5 !important; }
.alert-success { background: rgba(16,185,129,0.12) !important; border-color: rgba(16,185,129,0.3) !important; color: #6ee7b7 !important; }
.alert-warning { background: rgba(245,158,11,0.12) !important; border-color: rgba(245,158,11,0.3) !important; color: #fcd34d !important; }

/* ── Staggered Card Animations ── */
.col-md-4:nth-child(1) .card { animation: fadeUp 0.5s 0.1s ease both; }
.col-md-4:nth-child(2) .card { animation: fadeUp 0.5s 0.2s ease both; }
.col-md-4:nth-child(3) .card { animation: fadeUp 0.5s 0.3s ease both; }
.col-md-4:nth-child(4) .card { animation: fadeUp 0.5s 0.4s ease both; }
.col-md-4:nth-child(5) .card { animation: fadeUp 0.5s 0.5s ease both; }
.col-md-4:nth-child(6) .card { animation: fadeUp 0.5s 0.6s ease both; }

/* ── Footer ── */
footer {
  text-align: center;
  padding: 24px;
  color: var(--text-muted);
  font-size: 0.85rem;
  border-top: 1px solid var(--border-glass);
  margin-top: 60px;
}

footer a { color: var(--accent-blue); text-decoration: none; transition: var(--transition); }
footer a:hover { color: var(--accent-cyan); }

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-dark); }
::-webkit-scrollbar-thumb { background: rgba(59,130,246,0.3); border-radius: 10px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent-blue); }

/* ── Responsive ── */
@media (max-width: 768px) {
  .hero { padding: 80px 20px 60px; }
  .auth-card .card-body { padding: 28px !important; }
  .dashboard-header { padding: 16px 20px; }
  .stat-card h2 { font-size: 2rem; }
}

/* ── Toast Notifications ── */
.toast-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 18px;
  border-radius: 12px;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255,255,255,0.1);
  box-shadow: 0 8px 32px rgba(0,0,0,0.4);
  font-family: 'DM Sans', sans-serif;
  font-size: 0.9rem;
  color: #f0f4ff;
  animation: toastIn 0.4s cubic-bezier(0.34,1.56,0.64,1) forwards;
  cursor: pointer;
  min-width: 280px;
}

.toast-item.hide {
  animation: toastOut 0.35s ease forwards;
}

.toast-success { background: rgba(16,185,129,0.15);  border-color: rgba(16,185,129,0.35); }
.toast-danger  { background: rgba(239,68,68,0.15);   border-color: rgba(239,68,68,0.35);  }
.toast-warning { background: rgba(245,158,11,0.15);  border-color: rgba(245,158,11,0.35); }
.toast-info    { background: rgba(59,130,246,0.15);  border-color: rgba(59,130,246,0.35); }

.toast-icon { font-size: 1.2rem; flex-shrink: 0; margin-top: 1px; }
.toast-body { flex: 1; }

.toast-title {
  font-family: 'Syne', sans-serif;
  font-weight: 700;
  font-size: 0.82rem;
  margin-bottom: 2px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.toast-success .toast-title { color: #6ee7b7; }
.toast-danger  .toast-title { color: #fca5a5; }
.toast-warning .toast-title { color: #fcd34d; }
.toast-info    .toast-title { color: #93c5fd; }

.toast-msg { color: #d1d9e6; font-size: 0.88rem; line-height: 1.4; }

.toast-progress {
  position: absolute;
  bottom: 0;
  left: 0;
  height: 3px;
  border-radius: 0 0 12px 12px;
  animation: toastProgress 3.5s linear forwards;
}

.toast-success .toast-progress { background: #10b981; }
.toast-danger  .toast-progress { background: #ef4444; }
.toast-warning .toast-progress { background: #f59e0b; }
.toast-info    .toast-progress { background: #3b82f6; }

@keyframes toastIn {
  from { opacity: 0; transform: translateX(60px) scale(0.9); }
  to   { opacity: 1; transform: translateX(0)    scale(1);   }
}

@keyframes toastOut {
  from { opacity: 1; transform: translateX(0)    scale(1);   }
  to   { opacity: 0; transform: translateX(60px) scale(0.9); }
}

@keyframes toastProgress {
  from { width: 100%; }
  to   { width: 0%;   }
}

/* ── Skeleton Loaders ── */
.skeleton-card {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08) !important;
  border-radius: 16px !important;
  padding: 20px;
  height: 200px;
  overflow: hidden;
  position: relative;
}

.skeleton-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(255,255,255,0.06) 50%,
    transparent 100%
  );
  animation: shimmer 1.5s infinite;
}

@keyframes shimmer {
  from { left: -100%; }
  to   { left:  100%; }
}

.skeleton-line {
  background: rgba(255,255,255,0.08);
  border-radius: 6px;
  margin-bottom: 12px;
}

.skeleton-line.short  { width: 40%; height: 12px; }
.skeleton-line.medium { width: 70%; height: 14px; }
.skeleton-line.long   { width: 90%; height: 12px; }
.skeleton-line.full   { width: 100%; height: 10px; }
.skeleton-line.badge  { width: 80px; height: 24px; border-radius: 20px; }
.skeleton-line.btn    { width: 100%; height: 34px; border-radius: 8px; margin-top: 8px; }

/* ── Light Mode ── */
body.light-mode {
  --bg-dark: #f0f4ff;
  --bg-card: rgba(255,255,255,0.85);
  --bg-card-hover: rgba(255,255,255,0.95);
  --border-glass: rgba(0,0,0,0.1);
  --text-primary: #0a0e1a;
  --text-muted: #4b5563;
  --shadow-card: 0 8px 32px rgba(0,0,0,0.1);
  --gradient-hero: linear-gradient(135deg,#e0eaff 0%,#f0f4ff 50%,#e8f4fd 100%);
}

body.light-mode {
  background: #f0f4ff;
  color: #0a0e1a;
}

body.light-mode::before {
  background:
    radial-gradient(ellipse at 20% 20%, rgba(59,130,246,0.06) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 80%, rgba(6,182,212,0.04) 0%, transparent 50%);
}

body.light-mode .navbar {
  background: rgba(240,244,255,0.9) !important;
  border-bottom: 1px solid rgba(0,0,0,0.08);
}

body.light-mode .card {
  background: rgba(255,255,255,0.9) !important;
  border-color: rgba(0,0,0,0.08) !important;
  box-shadow: 0 4px 20px rgba(0,0,0,0.08) !important;
}

body.light-mode .card:hover {
  background: rgba(255,255,255,1) !important;
  border-color: rgba(59,130,246,0.3) !important;
}

body.light-mode .form-control,
body.light-mode .form-select {
  background: rgba(255,255,255,0.9) !important;
  border-color: rgba(0,0,0,0.15) !important;
  color: #0a0e1a !important;
}

body.light-mode .form-control::placeholder {
  color: #9ca3af !important;
}

body.light-mode .form-label { color: #4b5563; }

body.light-mode .user-pill {
  background: rgba(59,130,246,0.1);
  border-color: rgba(59,130,246,0.2);
  color: #1d4ed8;
}

body.light-mode .btn-outline-light {
  border-color: rgba(0,0,0,0.2) !important;
  color: #0a0e1a !important;
}

body.light-mode .btn-outline-light:hover {
  background: rgba(0,0,0,0.05) !important;
}

body.light-mode .table { color: #0a0e1a !important; }

body.light-mode .table thead th {
  background: rgba(59,130,246,0.08) !important;
  color: #1d4ed8 !important;
}

body.light-mode .table tbody tr:hover {
  background: rgba(0,0,0,0.02) !important;
}

body.light-mode footer {
  border-top-color: rgba(0,0,0,0.08);
  color: #6b7280;
}

body.light-mode .skeleton-card {
  background: rgba(0,0,0,0.04);
  border-color: rgba(0,0,0,0.06) !important;
}

body.light-mode .skeleton-line {
  background: rgba(0,0,0,0.08);
}

body.light-mode .toast-item {
  box-shadow: 0 8px 32px rgba(0,0,0,0.15);
}

/* ── Toggle Button ── */
.theme-toggle {
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 50px;
  padding: 6px 14px;
  color: var(--text-primary);
  font-size: 0.85rem;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: 'DM Sans', sans-serif;
  font-weight: 500;
}

.theme-toggle:hover {
  background: rgba(255,255,255,0.15);
  transform: scale(1.05);
}

body.light-mode .theme-toggle {
  background: rgba(0,0,0,0.06);
  border-color: rgba(0,0,0,0.12);
  color: #0a0e1a;
}

body.light-mode .theme-toggle:hover {
  background: rgba(0,0,0,0.1);
}