/* ============================================
   Online Educator Portal - Main CSS
   ============================================ */

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

:root {
  --primary: #7c3aed;
  --primary-dark: #5b21b6;
  --primary-light: #ede9fe;
  --secondary: #06b6d4;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --dark: #0f172a;
  --dark-2: #1e293b;
  --dark-3: #334155;
  --text: #334155;
  --text-muted: #94a3b8;
  --border: #e2e8f0;
  --bg: #f8fafc;
  --card-bg: #ffffff;
  --gradient: linear-gradient(135deg, #7c3aed 0%, #06b6d4 100%);
  --gradient-dark: linear-gradient(135deg, #0f172a 0%, #1e1b4b 100%);
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
  --shadow: 0 4px 20px rgba(124,58,237,0.1);
  --shadow-lg: 0 20px 60px rgba(124,58,237,0.15);
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 20px;
  --transition: all 0.3s cubic-bezier(0.4,0,0.2,1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: 'Inter', sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}

/* ---- NAVBAR ---- */
#mainNav {
  background: rgba(15,23,42,0.95);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255,255,255,0.05);
  transition: var(--transition);
  padding: 12px 0;
}
#mainNav.scrolled {
  background: rgba(15,23,42,0.98);
  box-shadow: 0 4px 30px rgba(0,0,0,0.3);
}
.navbar-nav .nav-link {
  color: rgba(255,255,255,0.75) !important;
  font-weight: 500;
  padding: 8px 14px !important;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  font-size: 0.9rem;
}
.navbar-nav .nav-link:hover, .navbar-nav .nav-link.active {
  color: #fff !important;
  background: rgba(124,58,237,0.2);
}
.brand-icon {
  width: 36px; height: 36px;
  background: var(--gradient);
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 18px; color: #fff;
}
.brand-text {
  font-family: 'Outfit', sans-serif;
  font-weight: 700;
  font-size: 1.2rem;
  color: #fff;
}
.avatar-sm {
  width: 28px; height: 28px;
  background: var(--gradient);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 14px;
}

/* ---- HERO ---- */
.hero-section {
  background: var(--gradient-dark);
  position: relative;
  overflow: hidden;
  min-height: 85vh;
  display: flex;
  align-items: center;
}
.hero-bg-shapes .shape {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.15;
}
.shape-1 { width: 500px; height: 500px; background: var(--primary); top: -100px; right: -100px; animation: float 8s ease-in-out infinite; }
.shape-2 { width: 300px; height: 300px; background: var(--secondary); bottom: -50px; left: 10%; animation: float 6s ease-in-out infinite reverse; }
.shape-3 { width: 200px; height: 200px; background: #f59e0b; top: 40%; left: 40%; animation: float 10s ease-in-out infinite; }
@keyframes float { 0%,100%{transform:translateY(0)} 50%{transform:translateY(-20px)} }

.min-vh-85 { min-height: 85vh; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 6px;
  background: rgba(124,58,237,0.2);
  border: 1px solid rgba(124,58,237,0.4);
  color: #c4b5fd;
  padding: 6px 14px;
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 500;
}
.hero-title {
  font-family: 'Outfit', sans-serif;
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800;
  color: #fff;
  line-height: 1.15;
  margin-bottom: 1.25rem;
}
.hero-subtitle {
  font-size: 1.15rem;
  color: rgba(255,255,255,0.7);
  max-width: 500px;
  margin-bottom: 2rem;
}
.hero-stats { margin-bottom: 1.5rem; }
.stat-item { display: flex; flex-direction: column; }
.stat-num { font-family: 'Outfit', sans-serif; font-size: 1.8rem; font-weight: 800; color: #fff; }
.stat-label { font-size: 0.8rem; color: rgba(255,255,255,0.6); }
.stat-divider { width: 1px; background: rgba(255,255,255,0.2); }
.hero-search .input-group { background: #fff; border-radius: 50px; overflow: hidden; box-shadow: var(--shadow-lg); }
.hero-search .form-control { border: none; padding: 14px 16px; font-size: 0.95rem; }
.hero-search .btn { border-radius: 0 50px 50px 0; padding: 12px 24px; }

/* Hero illustration */
.hero-illustration { position: relative; width: 450px; height: 450px; }
.hero-circle {
  width: 280px; height: 280px;
  background: var(--gradient);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 5rem; color: rgba(255,255,255,0.3);
  position: absolute; top: 50%; left: 50%; transform: translate(-50%,-50%);
  box-shadow: 0 0 80px rgba(124,58,237,0.4);
}
.floating-card {
  position: absolute;
  background: rgba(255,255,255,0.1);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: var(--radius);
  padding: 10px 16px;
  display: flex; align-items: center; gap: 8px;
  color: #fff; font-size: 0.9rem; font-weight: 600;
  white-space: nowrap;
}
.card-1 { top: 10%; left: -20px; animation: float 5s ease-in-out infinite; }
.card-2 { bottom: 20%; right: -20px; animation: float 7s ease-in-out infinite reverse; }
.card-3 { bottom: 5%; left: 20px; animation: float 6s ease-in-out infinite 1s; }

/* ---- SECTIONS ---- */
.section-padding { padding: 80px 0; }
.section-header { margin-bottom: 3rem; }
.section-badge {
  display: inline-block;
  background: var(--primary-light);
  color: var(--primary);
  padding: 6px 16px;
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 12px;
}
.section-badge-light {
  display: inline-block;
  background: rgba(255,255,255,0.1);
  color: rgba(255,255,255,0.8);
  padding: 6px 16px;
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 12px;
}
.section-title {
  font-family: 'Outfit', sans-serif;
  font-size: clamp(1.8rem, 3vw, 2.5rem);
  font-weight: 700;
  color: var(--dark);
}
.section-subtitle { color: var(--text-muted); font-size: 1.05rem; }
.bg-light-purple { background: #faf5ff; }
.bg-gradient-dark { background: var(--gradient-dark); }

/* ---- CATEGORY CARDS ---- */
.category-card {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  padding: 32px 20px;
  border: 1px solid var(--border);
  text-decoration: none;
  transition: var(--transition);
  color: var(--text);
  box-shadow: 0 4px 6px -1px rgba(0,0,0,0.05);
  display: flex;
  flex-direction: column;
  align-items: center;
}
.category-card:hover { 
  transform: translateY(-10px); 
  border-color: var(--primary); 
  box-shadow: 0 20px 40px rgba(124,58,237,0.15); 
  background: #fff;
}
.category-icon {
  width: 70px; height: 70px;
  background: var(--primary-light);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.8rem; color: var(--primary);
  margin-bottom: 20px;
  transition: var(--transition);
  position: relative;
}
.category-card:hover .category-icon { 
  background: var(--primary); 
  color: #fff; 
  transform: rotate(10deg);
}
.category-name { font-family: 'Outfit', sans-serif; font-weight: 700; font-size: 1.1rem; }

/* ---- EDUCATOR CARDS ---- */
.educator-card {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  padding: 24px;
  border: 1px solid var(--border);
  transition: var(--transition);
}
.educator-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: var(--primary); }
.educator-card-header { display: flex; align-items: center; gap: 14px; margin-bottom: 14px; }
.educator-avatar { width: 60px; height: 60px; border-radius: 50%; object-fit: cover; border: 3px solid var(--primary-light); }
.educator-avatar-placeholder {
  width: 60px; height: 60px;
  background: var(--gradient);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.5rem; font-weight: 700; color: #fff;
  flex-shrink: 0;
}
.educator-name { font-weight: 700; font-size: 1rem; margin-bottom: 2px; }
.educator-subjects { color: var(--text-muted); font-size: 0.82rem; margin: 0; }
.educator-bio { margin-bottom: 12px; }
.educator-stats {
  display: flex; gap: 12px; flex-wrap: wrap;
  font-size: 0.82rem; color: var(--text-muted);
  padding: 10px 0; border-top: 1px solid var(--border);
}
.educator-stats span { display: flex; align-items: center; gap: 4px; }

/* ---- COURSE CARDS ---- */
.course-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  overflow: hidden;
  transition: var(--transition);
}
.course-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.course-thumbnail { position: relative; aspect-ratio: 16/9; overflow: hidden; }
.course-thumbnail img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s; }
.course-card:hover .course-thumbnail img { transform: scale(1.05); }
.course-thumb-placeholder {
  width: 100%; height: 100%;
  background: var(--gradient);
  display: flex; align-items: center; justify-content: center;
  font-size: 2.5rem; color: rgba(255,255,255,0.5);
}
.course-badge { position: absolute; top: 10px; left: 10px; font-size: 0.75rem; font-weight: 700; padding: 4px 10px; border-radius: 6px; }
.badge-free { background: #10b981; color: #fff; }
.course-body { padding: 16px; }
.course-level { font-size: 0.72rem; color: var(--primary); font-weight: 600; text-transform: uppercase; letter-spacing: 0.05em; }
.course-title { font-weight: 700; font-size: 0.95rem; margin: 4px 0; color: var(--dark); }
.course-educator { font-size: 0.82rem; color: var(--text-muted); margin: 0; }
.course-price { font-weight: 800; color: var(--primary); font-size: 1rem; }
.course-students { font-size: 0.8rem; color: var(--text-muted); }

/* ---- HOW IT WORKS ---- */
.step-icon {
  width: 80px; height: 80px;
  background: rgba(255,255,255,0.05);
  border: 2px solid rgba(124,58,237,0.3);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 2rem; color: var(--primary);
  margin: 0 auto;
  position: relative;
  transition: var(--transition);
}
.step-icon:hover { background: rgba(124,58,237,0.2); transform: scale(1.1); }
.step-number {
  position: absolute; top: -8px; right: -8px;
  width: 24px; height: 24px;
  background: var(--gradient);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.7rem; font-weight: 700; color: #fff;
}

/* ---- CTA CARD ---- */
.cta-card {
  background: var(--gradient);
  border-radius: var(--radius-lg);
  padding: 50px 40px;
  color: #fff;
}
.cta-card h2 { font-family: 'Outfit', sans-serif; font-weight: 700; margin-bottom: 8px; }
.cta-card p { opacity: 0.85; margin: 0; }

/* ---- AUTH ---- */
.auth-section { background: var(--gradient-dark); min-height: 100vh; }
.auth-card {
  background: rgba(255,255,255,0.05);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-lg);
  padding: 40px;
  color: #fff;
}
.auth-icon {
  width: 70px; height: 70px;
  background: var(--gradient);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 2rem; color: #fff;
  margin: 0 auto 16px;
}
.auth-title { font-family: 'Outfit', sans-serif; font-weight: 700; font-size: 1.8rem; color: #fff; }
.auth-card .form-control { background: rgba(255,255,255,0.08); border: 1px solid rgba(255,255,255,0.15); color: #fff; border-radius: var(--radius-sm); padding: 12px 14px; }
.auth-card .form-control::placeholder { color: rgba(255,255,255,0.4); }
.auth-card .form-control:focus { background: rgba(255,255,255,0.12); border-color: var(--primary); box-shadow: 0 0 0 3px rgba(124,58,237,0.2); color: #fff; }
.auth-card .form-label { color: rgba(255,255,255,0.8); font-weight: 500; font-size: 0.9rem; }
.auth-footer p { color: rgba(255,255,255,0.6); font-size: 0.9rem; }
.auth-footer a { color: #a78bfa; }

/* ---- DASHBOARD ---- */
:root {
  --nav-height: 70px;
}
.dashboard-body { overflow-x: hidden; }
.dashboard-layout { display: flex; min-height: 100vh; }
.dashboard-sidebar {
  width: 260px;
  background: var(--dark);
  position: fixed;
  top: var(--nav-height); left: 0; bottom: 0;
  z-index: 1000;
  display: flex; flex-direction: column;
  overflow-y: auto;
  transition: var(--transition);
}
.sidebar-brand {
  display: flex; align-items: center; gap: 10px;
  padding: 20px 20px 16px;
  color: #fff;
  font-family: 'Outfit', sans-serif;
  font-weight: 700; font-size: 1.1rem;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.sidebar-brand i { font-size: 1.4rem; color: var(--primary); }
.sidebar-user {
  display: flex; align-items: center; gap: 10px;
  padding: 16px 20px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.sidebar-avatar { width: 40px; height: 40px; border-radius: 50%; object-fit: cover; border: 2px solid var(--primary); }
.sidebar-avatar-placeholder {
  width: 40px; height: 40px;
  background: var(--gradient);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; color: #fff; font-size: 1rem;
  flex-shrink: 0;
}
.sidebar-user-name { color: #fff; font-weight: 600; font-size: 0.88rem; margin: 0; }
.sidebar-user-role { color: var(--text-muted); font-size: 0.75rem; }
.sidebar-nav { list-style: none; padding: 12px 0; flex: 1; }
.sidebar-nav li { padding: 0; }
.sidebar-section {
  padding: 14px 20px 6px;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  font-weight: 600;
}
.sidebar-link {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 20px;
  color: rgba(255,255,255,0.65);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: var(--transition);
  border-radius: 0;
  position: relative;
}
.sidebar-link:hover { color: #fff; background: rgba(255,255,255,0.05); }
.sidebar-link.active { color: #fff; background: rgba(124,58,237,0.2); border-left: 3px solid var(--primary); }
.sidebar-link i { font-size: 1rem; width: 18px; text-align: center; }
.dashboard-main {
  margin-left: 260px;
  flex: 1;
  padding: 0;
  min-height: 100vh;
  background: #f1f5f9;
}
.dashboard-topbar {
  background: #fff;
  padding: 20px 28px;
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: sticky; top: var(--nav-height); z-index: 100;
  box-shadow: var(--shadow-sm);
}
.dashboard-topbar h4 { font-family: 'Outfit', sans-serif; font-weight: 700; color: var(--dark); }

/* Stat Cards */
.stat-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 24px;
  display: flex;
  align-items: center;
  gap: 16px;
  border: 1px solid var(--border);
  transition: var(--transition);
  margin: 0 28px;
}
.stat-card:first-child { margin-top: 28px; }
.row.g-4.mb-4 { padding: 28px 28px 0; }
.row.g-4.mb-4 .stat-card { margin: 0; }
.stat-card:hover { transform: translateY(-2px); box-shadow: var(--shadow); }
.stat-card-icon {
  width: 56px; height: 56px;
  border-radius: var(--radius);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.5rem;
  flex-shrink: 0;
}
.stat-card-blue .stat-card-icon { background: #dbeafe; color: #2563eb; }
.stat-card-purple .stat-card-icon { background: var(--primary-light); color: var(--primary); }
.stat-card-green .stat-card-icon { background: #d1fae5; color: var(--success); }
.stat-card-orange .stat-card-icon { background: #fef3c7; color: var(--warning); }
.stat-card-red .stat-card-icon { background: #fee2e2; color: var(--danger); }
.stat-card-number {
  font-family: 'Outfit', sans-serif;
  font-size: 1.8rem; font-weight: 800;
  color: var(--dark); display: block;
}
.stat-card-label { font-size: 0.82rem; color: var(--text-muted); }

/* Dash Cards */
.dash-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  overflow: hidden;
}
.row.g-4 { padding: 0 28px 28px; }
.dash-card-header {
  padding: 18px 20px;
  border-bottom: 1px solid var(--border);
  display: flex; justify-content: space-between; align-items: center;
  background: #fff;
}
.dash-card-header h5, .dash-card-header h6 { font-weight: 700; color: var(--dark); }

/* Schedule Items */
.schedule-item {
  display: flex; gap: 14px; align-items: center;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
}
.schedule-time {
  text-align: center;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: var(--radius-sm);
  padding: 6px 10px;
  font-weight: 700;
  font-size: 0.8rem;
  min-width: 52px;
}

/* ---- PAGE HERO ---- */
.page-hero {
  background: var(--gradient-dark);
  padding: 80px 0 60px;
  color: #fff;
}
.page-hero h1 { font-family: 'Outfit', sans-serif; font-weight: 700; font-size: clamp(2rem,4vw,3rem); }
.page-hero .lead { color: rgba(255,255,255,0.7); }

/* ---- FILTER BAR ---- */
.filter-bar {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 20px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}

/* ---- ADMIN ---- */
.admin-sidebar .sidebar-brand i { color: #ef4444; }

/* ---- FOOTER ---- */
.site-footer {
  background: var(--dark);
  color: rgba(255,255,255,0.7);
  padding: 60px 0 30px;
}
.footer-heading {
  color: #fff; font-weight: 600;
  margin-bottom: 16px;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.footer-links { list-style: none; padding: 0; }
.footer-links li { margin-bottom: 8px; font-size: 0.9rem; }
.footer-links a { color: rgba(255,255,255,0.6); text-decoration: none; transition: var(--transition); }
.footer-links a:hover { color: var(--primary); padding-left: 4px; }
.footer-divider { border-color: rgba(255,255,255,0.1); margin: 30px 0 20px; }
.social-link {
  width: 36px; height: 36px;
  background: rgba(255,255,255,0.08);
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  color: rgba(255,255,255,0.7);
  text-decoration: none;
  transition: var(--transition);
}
.social-link:hover { background: var(--primary); color: #fff; transform: translateY(-2px); }

/* ---- COURSE THUMB MINI ---- */
.course-thumb-mini {
  width: 40px; height: 40px;
  background: var(--primary-light);
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  color: var(--primary); font-size: 1rem;
}
.avatar-xs {
  width: 32px; height: 32px;
  background: var(--gradient);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-weight: 700; font-size: 0.8rem;
  flex-shrink: 0;
}
.btn-xs { font-size: 0.75rem; padding: 3px 8px; }

/* ---- ANNOUNCEMENT TICKER ---- */
.announcement-ticker { overflow: hidden; white-space: nowrap; font-size: 0.9rem; }

/* ---- BUTTONS ---- */
.btn-primary { background: var(--gradient); border: none; font-weight: 600; transition: var(--transition); }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-1px); box-shadow: 0 4px 15px rgba(124,58,237,0.4); }
.btn-outline-primary { border-color: var(--primary); color: var(--primary); font-weight: 600; }
.btn-outline-primary:hover { background: var(--primary); border-color: var(--primary); transform: translateY(-1px); }

/* ---- RESPONSIVE ---- */
@media (max-width: 992px) {
  :root {
    --nav-height: 60px;
  }
  .dashboard-sidebar {
    transform: translateX(-100%);
    width: 260px;
    z-index: 1040;
    box-shadow: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  }
  .dashboard-sidebar.open {
    transform: translateX(0);
  }
  .dashboard-main {
    margin-left: 0 !important;
  }
  .sidebar-toggle-btn {
    display: flex !important;
  }
  .row.g-4 { padding: 0 16px 16px; }
  .row.g-4.mb-4 { padding: 16px 16px 0; }
}

@media (max-width: 992px) and (max-height: 500px) {
  :root {
    --nav-height: 50px;
  }
  .dashboard-sidebar {
    width: 240px;
  }
}

@media (max-width: 768px) {
  .section-padding { padding: 50px 0; }
  .hero-title { font-size: 2rem; }
  .cta-card { padding: 30px 20px; }
}

/* Sidebar backdrop */
.sidebar-backdrop {
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(15, 23, 42, 0.4);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 1030;
  opacity: 0;
  transition: opacity 0.25s ease;
  pointer-events: none;
}
.sidebar-backdrop.show {
  opacity: 1;
  pointer-events: auto;
}

/* Hamburger toggle */
.sidebar-toggle-btn {
  display: none;
  align-items: center;
  justify-content: center;
  border: none;
  background: transparent;
  color: var(--dark);
  cursor: pointer;
  padding: 0;
  margin-right: 12px;
}
.sidebar-toggle-btn:focus {
  outline: none;
}

/* ---- UTILITIES ---- */
.text-primary { color: var(--primary) !important; }
.bg-primary { background: var(--primary) !important; }