/* Modern Responsive Stylesheet for Kaashiv InfoTech Internship Support Portal */
:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-light: #60a5fa;
  --accent: #f59e0b;
  --accent-hover: #d97706;
  --success: #10b981;
  --danger: #ef4444;
  --purple: #8b5cf6;
  
  --dark-bg: #0b0f19;
  --dark-card: #111827;
  --dark-border: #1f2937;
  --dark-text: #f3f4f6;
  --dark-muted: #9ca3af;
  
  --light-bg: #f8fafc;
  --light-card: #ffffff;
  --light-border: #e2e8f0;
  --text-main: #0f172a;
  --text-muted: #64748b;
  
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-full: 9999px;
  
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 10px 25px -5px rgba(15, 23, 42, 0.1), 0 8px 10px -6px rgba(15, 23, 42, 0.05);
  --shadow-lg: 0 20px 35px -5px rgba(15, 23, 42, 0.15), 0 10px 15px -5px rgba(15, 23, 42, 0.08);
  --shadow-glow: 0 0 35px rgba(37, 99, 235, 0.25);
  
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: 'Plus Jakarta Sans', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  color: var(--text-main);
  background-color: var(--light-bg);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition-fast);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

button, input, select, textarea {
  font-family: inherit;
}

.container {
  width: 100%;
  max-width: 1240px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
}

/* Typography Utilities */
.section-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  background: rgba(37, 99, 235, 0.1);
  color: var(--primary);
  margin-bottom: 14px;
}

.section-badge.accent {
  background: rgba(245, 158, 11, 0.12);
  color: var(--accent-hover);
}

.section-title {
  font-size: clamp(1.9rem, 3.5vw, 2.75rem);
  font-weight: 800;
  line-height: 1.25;
  color: var(--text-main);
  margin-bottom: 14px;
  letter-spacing: -0.02em;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 680px;
  margin-bottom: 36px;
}

.text-center {
  text-align: center;
}

.mx-auto {
  margin-left: auto;
  margin-right: auto;
}

.gradient-text {
  background: linear-gradient(135deg, var(--primary) 0%, #06b6d4 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.gradient-text-warm {
  background: linear-gradient(135deg, #f59e0b 0%, #ea580c 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* BUTTONS */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-weight: 700;
  font-size: 0.95rem;
  padding: 13px 26px;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-normal);
  text-align: center;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, #1d4ed8 100%);
  color: #fff;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 22px rgba(37, 99, 235, 0.45);
  background: linear-gradient(135deg, #1d4ed8 0%, #1e40af 100%);
}

.btn-accent {
  background: linear-gradient(135deg, #f59e0b 0%, #ea580c 100%);
  color: #fff;
  box-shadow: 0 4px 14px rgba(245, 158, 11, 0.35);
}

.btn-accent:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 22px rgba(245, 158, 11, 0.45);
}

.btn-outline {
  background: #fff;
  color: var(--text-main);
  border-color: var(--light-border);
  box-shadow: var(--shadow-sm);
}

.btn-outline:hover {
  background: #f1f5f9;
  border-color: #cbd5e1;
  transform: translateY(-2px);
}

.btn-whatsapp {
  background: #25D366;
  color: #fff;
  box-shadow: 0 4px 14px rgba(37, 211, 102, 0.35);
}

.btn-whatsapp:hover {
  background: #20b858;
  transform: translateY(-2px);
}

.btn-sm {
  padding: 8px 16px;
  font-size: 0.85rem;
  border-radius: var(--radius-sm);
}

.btn-lg {
  padding: 16px 34px;
  font-size: 1.05rem;
  border-radius: var(--radius-md);
}

/* TOP CONTACT STRIP */
.top-strip {
  background: #0f172a;
  color: #cbd5e1;
  font-size: 0.825rem;
  padding: 7px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.top-strip .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}

.top-strip-left, .top-strip-right {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
}

.strip-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.strip-item a:hover {
  color: #fff;
}

.badge-live {
  background: rgba(16, 185, 129, 0.2);
  color: #34d399;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  font-weight: 700;
  font-size: 0.75rem;
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.pulse-dot {
  width: 7px;
  height: 7px;
  background: #10b981;
  border-radius: 50%;
  animation: pulseAnimation 1.6s infinite ease-in-out;
}

@keyframes pulseAnimation {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
  70% { transform: scale(1.1); box-shadow: 0 0 0 6px rgba(16, 185, 129, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

/* HEADER & NAVBAR */
.site-header {
  position: sticky;
  top: 0;
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--light-border);
  z-index: 990;
  transition: all var(--transition-normal);
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 0;
  gap: 16px;
}

.logo-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
  text-decoration: none;
}

.logo-img {
  height: 44px;
  width: auto;
  max-width: 220px;
  object-fit: contain;
  display: block;
}

.logo-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--primary) 0%, #06b6d4 100%);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.3rem;
  font-weight: 900;
  box-shadow: 0 4px 10px rgba(37, 99, 235, 0.25);
  flex-shrink: 0;
}

.logo-text h1, .logo-text .brand-title {
  font-size: 1.15rem;
  font-weight: 800;
  line-height: 1.15;
  color: var(--text-main);
  letter-spacing: -0.01em;
  white-space: nowrap;
}

.logo-text p {
  font-size: 0.68rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.4px;
  white-space: nowrap;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 16px;
  list-style: none;
  flex-shrink: 1;
}

.nav-link {
  font-size: 0.88rem;
  font-weight: 600;
  color: #334155;
  padding: 6px 4px;
  position: relative;
  white-space: nowrap;
  display: inline-block;
}

.nav-link:hover, .nav-link.active {
  color: var(--primary);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: width var(--transition-fast);
  border-radius: 2px;
}

.nav-link:hover::after, .nav-link.active::after {
  width: 100%;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.nav-actions .btn {
  white-space: nowrap;
  padding: 9px 18px;
  font-size: 0.88rem;
}

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.6rem;
  color: var(--text-main);
  cursor: pointer;
  padding: 4px;
}

/* HERO SECTION */
.hero-section {
  position: relative;
  padding: 70px 0 60px;
  background: radial-gradient(circle at 80% 20%, rgba(37, 99, 235, 0.08) 0%, transparent 50%),
              radial-gradient(circle at 10% 80%, rgba(6, 182, 212, 0.08) 0%, transparent 40%),
              #ffffff;
  border-bottom: 1px solid var(--light-border);
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  align-items: center;
}

.hero-content {
  position: relative;
  z-index: 2;
}

.hero-trust-badges {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.trust-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  background: #f1f5f9;
  border: 1px solid #e2e8f0;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 700;
  color: #334155;
}

.trust-pill.stars {
  background: #fef3c7;
  border-color: #fde68a;
  color: #92400e;
}

.hero-title {
  font-size: clamp(2.3rem, 4vw, 3.4rem);
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -0.03em;
  color: #0f172a;
  margin-bottom: 18px;
}

.hero-desc {
  font-size: 1.12rem;
  color: #475569;
  line-height: 1.65;
  margin-bottom: 30px;
}

.hero-highlights {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin-bottom: 34px;
}

.hero-highlight-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.92rem;
  color: #334155;
  font-weight: 600;
}

.check-icon {
  color: var(--success);
  font-weight: 900;
  font-size: 1.1rem;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 32px;
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: 28px;
  padding-top: 24px;
  border-top: 1px solid var(--light-border);
}

.hero-stat-item strong {
  display: block;
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.1;
}

.hero-stat-item span {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 600;
}

/* HERO FORM CARD */
.hero-form-card {
  background: #ffffff;
  border: 1px solid var(--light-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-lg);
  position: relative;
}

.hero-form-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 5px;
  background: linear-gradient(90deg, var(--primary) 0%, #06b6d4 50%, var(--accent) 100%);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.form-header {
  margin-bottom: 20px;
}

.form-header h3 {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 4px;
}

.form-header p {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.form-group {
  margin-bottom: 15px;
}

.form-label {
  display: block;
  font-size: 0.82rem;
  font-weight: 700;
  color: #334155;
  margin-bottom: 6px;
}

.form-control {
  width: 100%;
  padding: 11px 14px;
  font-size: 0.92rem;
  border: 1.5px solid #cbd5e1;
  border-radius: var(--radius-sm);
  background-color: #f8fafc;
  color: var(--text-main);
  transition: all var(--transition-fast);
}

.form-control:focus {
  outline: none;
  border-color: var(--primary);
  background-color: #fff;
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.form-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.form-guarantee {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 14px;
  font-size: 0.78rem;
  color: #64748b;
  text-align: center;
}

/* MNC TRAINER STRIP */
.mnc-strip {
  background: #f8fafc;
  padding: 24px 0;
  border-bottom: 1px solid var(--light-border);
}

.mnc-strip-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
}

.mnc-label {
  font-size: 0.85rem;
  font-weight: 700;
  color: #64748b;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.mnc-logos {
  display: flex;
  align-items: center;
  gap: 28px;
  flex-wrap: wrap;
}

.mnc-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: #ffffff;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  border: 1px solid #e2e8f0;
  font-size: 0.85rem;
  font-weight: 700;
  color: #334155;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}

/* SECTION PADDING */
.section {
  padding: 85px 0;
}

.bg-white {
  background-color: #ffffff;
}

.bg-light {
  background-color: #f8fafc;
}

.bg-dark {
  background-color: #0b0f19;
  color: #f8fafc;
}

/* INTERNSHIP EXPLORER TABS */
.dept-tabs {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 38px;
}

.dept-tab-btn {
  background: #ffffff;
  border: 1.5px solid #e2e8f0;
  padding: 10px 22px;
  border-radius: var(--radius-full);
  font-size: 0.92rem;
  font-weight: 700;
  color: #475569;
  cursor: pointer;
  transition: all var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.dept-tab-btn:hover {
  border-color: #cbd5e1;
  background: #f1f5f9;
  color: var(--text-main);
}

.dept-tab-btn.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.3);
}

.dept-panel {
  display: none;
  animation: fadeIn 0.3s ease;
}

.dept-panel.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.tracks-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 26px;
}

.track-card {
  background: #ffffff;
  border: 1px solid var(--light-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.track-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
  border-color: #cbd5e1;
}

.track-card-accent {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
}

.track-header {
  margin-bottom: 16px;
}

.track-duration-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  background: #f1f5f9;
  border-radius: var(--radius-full);
  font-size: 0.78rem;
  font-weight: 700;
  color: #475569;
  margin-bottom: 10px;
}

.track-title {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1.3;
}

.track-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 18px;
}

.tech-tag {
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  font-size: 0.76rem;
  font-weight: 700;
  color: #334155;
  padding: 3px 8px;
  border-radius: 6px;
}

.track-projects {
  margin-bottom: 24px;
}

.track-projects h5 {
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: #64748b;
  margin-bottom: 8px;
}

.track-projects ul {
  list-style: none;
}

.track-projects li {
  font-size: 0.88rem;
  color: #334155;
  display: flex;
  align-items: flex-start;
  gap: 8px;
  margin-bottom: 6px;
}

.track-projects li::before {
  content: '▸';
  color: var(--primary);
  font-weight: bold;
}

.track-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 18px;
  border-top: 1px solid #f1f5f9;
  gap: 10px;
}

/* 5-DAY SYLLABUS BREAKDOWN (CODEBIND ADVANTAGE ELEVATED) */
.syllabus-timeline {
  display: flex;
  flex-direction: column;
  gap: 20px;
  max-width: 960px;
  margin: 0 auto;
}

.syllabus-day-card {
  background: #ffffff;
  border: 1.5px solid #e2e8f0;
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--transition-fast);
}

.syllabus-day-card:hover {
  border-color: #cbd5e1;
  box-shadow: var(--shadow-sm);
}

.day-header {
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  background: #ffffff;
  user-select: none;
}

.day-header-left {
  display: flex;
  align-items: center;
  gap: 16px;
}

.day-badge {
  width: 70px;
  height: 42px;
  background: linear-gradient(135deg, var(--primary) 0%, #1d4ed8 100%);
  color: #ffffff;
  font-size: 0.95rem;
  font-weight: 800;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  letter-spacing: 0.5px;
}

.day-title h4 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 2px;
}

.day-title span {
  font-size: 0.84rem;
  color: var(--text-muted);
}

.day-toggle-icon {
  font-size: 1.3rem;
  color: #94a3b8;
  transition: transform var(--transition-fast);
}

.syllabus-day-card.active .day-toggle-icon {
  transform: rotate(180deg);
  color: var(--primary);
}

.day-body {
  display: none;
  padding: 0 24px 22px 110px;
  border-top: 1px dashed #f1f5f9;
  background: #f8fafc;
}

.syllabus-day-card.active .day-body {
  display: block;
  padding-top: 18px;
}

.day-topics {
  list-style: none;
  margin-bottom: 14px;
}

.day-topics li {
  font-size: 0.92rem;
  color: #334155;
  margin-bottom: 8px;
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.day-topics li::before {
  content: '✓';
  color: var(--success);
  font-weight: 900;
}

.day-outcome {
  background: rgba(37, 99, 235, 0.08);
  border-left: 3px solid var(--primary);
  padding: 8px 14px;
  border-radius: 4px;
  font-size: 0.85rem;
  color: #1e3a8a;
  font-weight: 600;
}

/* CERTIFICATES 10-IN-1 GRID */
.certs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(225px, 1fr));
  gap: 20px;
}

.cert-card {
  background: #ffffff;
  border: 1px solid var(--light-border);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.cert-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: #93c5fd;
}

.cert-number {
  font-size: 0.8rem;
  font-weight: 800;
  color: var(--primary);
  background: rgba(37, 99, 235, 0.1);
  padding: 3px 8px;
  border-radius: 6px;
  align-self: flex-start;
  margin-bottom: 12px;
}

.cert-icon {
  font-size: 2rem;
  margin-bottom: 12px;
}

.cert-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 8px;
  line-height: 1.3;
}

.cert-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* APTITUDE / MNC PLACEMENT PRACTICE QUIZ (CODEBIND ADVANTAGE ELEVATED) */
.quiz-container {
  max-width: 820px;
  margin: 0 auto;
  background: #ffffff;
  border: 1px solid var(--light-border);
  border-radius: var(--radius-lg);
  padding: 36px;
  box-shadow: var(--shadow-lg);
}

.quiz-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--light-border);
  margin-bottom: 26px;
  flex-wrap: wrap;
  gap: 12px;
}

.quiz-step-badge {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--primary);
  background: #eff6ff;
  padding: 6px 14px;
  border-radius: var(--radius-full);
}

.quiz-score-live {
  font-size: 0.9rem;
  font-weight: 700;
  color: #059669;
}

.quiz-question-box {
  margin-bottom: 28px;
}

.quiz-q-num {
  font-size: 0.82rem;
  text-transform: uppercase;
  color: var(--text-muted);
  font-weight: 700;
  letter-spacing: 0.5px;
  margin-bottom: 6px;
}

.quiz-question-text {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.45;
}

.quiz-options {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 24px;
}

.quiz-opt-btn {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 18px;
  background: #f8fafc;
  border: 1.5px solid #e2e8f0;
  border-radius: var(--radius-md);
  cursor: pointer;
  text-align: left;
  font-size: 0.95rem;
  font-weight: 600;
  color: #334155;
  transition: all var(--transition-fast);
}

.quiz-opt-btn:hover:not(.locked) {
  border-color: #cbd5e1;
  background: #f1f5f9;
}

.opt-prefix {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: #e2e8f0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 0.85rem;
  color: #475569;
  flex-shrink: 0;
}

.quiz-opt-btn.correct {
  background: #ecfdf5;
  border-color: #10b981;
  color: #065f46;
}

.quiz-opt-btn.correct .opt-prefix {
  background: #10b981;
  color: #fff;
}

.quiz-opt-btn.incorrect {
  background: #fef2f2;
  border-color: #ef4444;
  color: #991b1b;
}

.quiz-opt-btn.incorrect .opt-prefix {
  background: #ef4444;
  color: #fff;
}

.quiz-explanation-box {
  display: none;
  background: #eff6ff;
  border-left: 4px solid var(--primary);
  padding: 14px 18px;
  border-radius: 4px;
  font-size: 0.88rem;
  color: #1e3a8a;
  margin-bottom: 24px;
}

.quiz-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.quiz-results-card {
  display: none;
  text-align: center;
  padding: 20px 0;
}

.quiz-result-trophy {
  font-size: 3.5rem;
  margin-bottom: 12px;
}

/* COMPARISON MATRIX (KAASHIV VS OTHERS) */
.comparison-table-wrapper {
  overflow-x: auto;
  background: #ffffff;
  border-radius: var(--radius-lg);
  border: 1px solid var(--light-border);
  box-shadow: var(--shadow-sm);
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.comparison-table th, .comparison-table td {
  padding: 16px 20px;
  border-bottom: 1px solid #f1f5f9;
}

.comparison-table th {
  background: #f8fafc;
  font-size: 0.9rem;
  font-weight: 700;
  color: #334155;
}

.comparison-table th.highlight-col {
  background: rgba(37, 99, 235, 0.08);
  color: var(--primary);
  font-size: 1rem;
  font-weight: 800;
}

.comparison-table td.highlight-col {
  background: rgba(37, 99, 235, 0.03);
  font-weight: 700;
  color: #0f172a;
}

/* FAQ ACCORDION */
.faq-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.faq-card {
  background: #ffffff;
  border: 1px solid var(--light-border);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-fast);
}

.faq-card:hover {
  border-color: #cbd5e1;
}

.faq-q {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 10px;
}

.faq-q-icon {
  color: var(--primary);
  font-size: 1.15rem;
  line-height: 1;
  flex-shrink: 0;
  margin-top: 2px;
}

.faq-a {
  font-size: 0.92rem;
  color: #475569;
  line-height: 1.6;
  padding-left: 28px;
}

/* CTA BANNER */
.cta-banner {
  background: linear-gradient(135deg, #1e3a8a 0%, #0f172a 100%);
  color: #ffffff;
  border-radius: var(--radius-lg);
  padding: 56px 40px;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.cta-banner::before {
  content: '';
  position: absolute;
  top: -40%;
  right: -20%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.3) 0%, transparent 70%);
  pointer-events: none;
}

.cta-banner-content {
  position: relative;
  z-index: 2;
  max-width: 760px;
  margin: 0 auto;
}

.cta-banner h2 {
  font-size: clamp(2rem, 3.5vw, 2.75rem);
  font-weight: 800;
  margin-bottom: 16px;
  line-height: 1.2;
}

.cta-banner p {
  font-size: 1.1rem;
  color: #cbd5e1;
  margin-bottom: 30px;
}

/* FOOTER */
.site-footer {
  background: #0b0f19;
  color: #94a3b8;
  padding: 70px 0 30px;
  border-top: 1px solid #1e293b;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 50px;
}

.footer-brand h4 {
  color: #fff;
  font-size: 1.3rem;
  font-weight: 800;
  margin-bottom: 12px;
}

.footer-logo {
  height: 48px;
  width: auto;
  max-width: 240px;
  object-fit: contain;
  margin-bottom: 16px;
  background: #ffffff;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  display: inline-block;
}

.footer-brand p {
  font-size: 0.88rem;
  line-height: 1.6;
  margin-bottom: 18px;
}

.footer-col h5 {
  color: #fff;
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 18px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 10px;
}

.footer-links a {
  font-size: 0.88rem;
  color: #94a3b8;
}

.footer-links a:hover {
  color: #fff;
  padding-left: 4px;
}

.footer-bottom {
  padding-top: 25px;
  border-top: 1px solid #1e293b;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 14px;
  font-size: 0.82rem;
}

/* STICKY FLOATING CONTACT BAR & WHATSAPP BUTTON */
.floating-whatsapp {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 995;
  display: flex;
  align-items: center;
  gap: 10px;
  background: #25D366;
  color: #fff;
  padding: 12px 20px;
  border-radius: var(--radius-full);
  box-shadow: 0 10px 25px rgba(37, 211, 102, 0.4);
  font-weight: 700;
  font-size: 0.95rem;
  transition: all var(--transition-normal);
  text-decoration: none;
}

.floating-whatsapp:hover {
  transform: scale(1.05) translateY(-3px);
  box-shadow: 0 14px 30px rgba(37, 211, 102, 0.55);
}

.floating-call {
  position: fixed;
  bottom: 24px;
  left: 24px;
  z-index: 995;
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--primary);
  color: #fff;
  padding: 12px 20px;
  border-radius: var(--radius-full);
  box-shadow: 0 10px 25px rgba(37, 99, 235, 0.4);
  font-weight: 700;
  font-size: 0.95rem;
  transition: all var(--transition-normal);
  text-decoration: none;
}

.floating-call:hover {
  transform: scale(1.05) translateY(-3px);
  box-shadow: 0 14px 30px rgba(37, 99, 235, 0.55);
}

/* MODAL DIALOG */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.7);
  backdrop-filter: blur(6px);
  z-index: 999;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.modal-overlay.active {
  display: flex;
}

.modal-box {
  background: #ffffff;
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 540px;
  padding: 32px;
  box-shadow: var(--shadow-lg);
  position: relative;
  animation: modalScale 0.25s ease;
}

@keyframes modalScale {
  from { opacity: 0; transform: scale(0.95); }
  to { opacity: 1; transform: scale(1); }
}

.modal-close-btn {
  position: absolute;
  top: 18px;
  right: 18px;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: #94a3b8;
  cursor: pointer;
  line-height: 1;
}

.modal-close-btn:hover {
  color: var(--text-main);
}

/* TOAST NOTIFICATION */
.toast-msg {
  position: fixed;
  top: 24px;
  right: 24px;
  z-index: 1000;
  background: #ffffff;
  border: 1px solid var(--light-border);
  padding: 16px 22px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  display: none;
  align-items: center;
  gap: 12px;
  font-weight: 600;
  max-width: 380px;
  animation: slideInRight 0.3s ease;
}

.toast-msg.success {
  border-left: 4px solid var(--success);
}

.toast-msg.error {
  border-left: 4px solid var(--danger);
}

@keyframes slideInRight {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* RESPONSIVE BREAKPOINTS */
@media (max-width: 1100px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .faq-grid {
    grid-template-columns: 1fr;
  }
  
  .nav-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: #ffffff;
    flex-direction: column;
    padding: 20px;
    border-bottom: 1px solid var(--light-border);
    box-shadow: var(--shadow-md);
  }
  
  .nav-menu.active {
    display: flex;
  }
  
  .mobile-toggle {
    display: block;
  }
  
  .day-body {
    padding-left: 24px;
  }
}

@media (max-width: 640px) {
  .tracks-grid {
    grid-template-columns: 1fr;
  }
  
  .hero-stats {
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
  }
  
  .form-row {
    grid-template-columns: 1fr;
  }
  
  .floating-whatsapp span, .floating-call span {
    display: none;
  }
  
  .floating-whatsapp, .floating-call {
    padding: 14px;
    border-radius: 50%;
  }
  
  .day-header-left {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
}

/* TECHNOLOGY HERO THEMES & DEPARTMENT LANDING PAGES */
.hero-dept {
  padding: 60px 0 50px;
  border-bottom: 1px solid var(--light-border);
}

.hero-dept-inner {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 40px;
  align-items: center;
}

.dept-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(37, 99, 235, 0.1);
  color: var(--primary);
  font-size: 0.85rem;
  font-weight: 700;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  margin-bottom: 18px;
}

.hero-dept h1 {
  font-size: clamp(2rem, 3.8vw, 2.9rem);
  font-weight: 800;
  line-height: 1.2;
  color: var(--text-main);
  margin-bottom: 18px;
  letter-spacing: -0.02em;
}

.dept-lead {
  font-size: 1.08rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 24px;
}

.dept-highlights-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-bottom: 30px;
}

.dept-pill {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.92rem;
  font-weight: 600;
  color: #334155;
}

.dept-pill i {
  color: var(--success);
}

.hero-cta-group {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

.dept-hero-card {
  background: #ffffff;
  border-radius: var(--radius-lg);
  border: 1px solid var(--light-border);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.card-header-gradient {
  background: linear-gradient(135deg, var(--primary) 0%, #06b6d4 100%);
  color: #ffffff;
  padding: 22px 26px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.card-header-gradient h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: #ffffff;
}

.dept-hero-card .card-body {
  padding: 24px 26px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.metric-row {
  display: flex;
  align-items: center;
  gap: 14px;
}

.metric-icon {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-md);
  background: rgba(37, 99, 235, 0.1);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.metric-info {
  display: flex;
  flex-direction: column;
}

.m-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  color: var(--text-muted);
  font-weight: 700;
  letter-spacing: 0.4px;
}

.m-val {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-main);
}

.hero-direct-apply {
  margin-top: 8px;
}

.hero-python {
  background: radial-gradient(circle at 85% 20%, rgba(245, 158, 11, 0.12) 0%, transparent 50%),
              radial-gradient(circle at 15% 80%, rgba(59, 130, 246, 0.10) 0%, transparent 40%),
              #ffffff;
}

.hero-cyber {
  background: radial-gradient(circle at 85% 20%, rgba(239, 68, 68, 0.12) 0%, transparent 50%),
              radial-gradient(circle at 15% 80%, rgba(15, 23, 42, 0.08) 0%, transparent 40%),
              #ffffff;
}

.hero-web {
  background: radial-gradient(circle at 85% 20%, rgba(16, 185, 129, 0.12) 0%, transparent 50%),
              radial-gradient(circle at 15% 80%, rgba(99, 102, 241, 0.10) 0%, transparent 40%),
              #ffffff;
}

.hero-cloud {
  background: radial-gradient(circle at 85% 20%, rgba(99, 102, 241, 0.14) 0%, transparent 50%),
              radial-gradient(circle at 15% 80%, rgba(6, 182, 212, 0.10) 0%, transparent 40%),
              #ffffff;
}

.hero-ds {
  background: radial-gradient(circle at 85% 20%, rgba(16, 185, 129, 0.14) 0%, transparent 50%),
              radial-gradient(circle at 15% 80%, rgba(37, 99, 235, 0.08) 0%, transparent 40%),
              #ffffff;
}

.hero-da {
  background: radial-gradient(circle at 85% 20%, rgba(245, 158, 11, 0.14) 0%, transparent 50%),
              radial-gradient(circle at 15% 80%, rgba(6, 182, 212, 0.10) 0%, transparent 40%),
              #ffffff;
}

/* Grids & Cards */
.grid {
  display: grid;
  gap: 24px;
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: #ffffff;
  border-radius: var(--radius-md);
  border: 1px solid var(--light-border);
  box-shadow: var(--shadow-sm);
  padding: 26px;
  transition: all var(--transition-normal);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.track-badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--primary);
  background: rgba(37, 99, 235, 0.08);
  padding: 4px 10px;
  border-radius: var(--radius-full);
  margin-bottom: 12px;
}

.track-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.track-desc {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 18px;
}

.skills-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.skills-tags .tag {
  background: #f1f5f9;
  color: #334155;
  font-size: 0.78rem;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
}

.project-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.proj-header {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 12px;
}

.proj-header i {
  font-size: 1.3rem;
  color: var(--primary);
  margin-top: 2px;
}

.proj-header h4 {
  font-size: 1.15rem;
  font-weight: 700;
}

.proj-desc {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 16px;
}

.proj-stack {
  font-size: 0.85rem;
  color: #334155;
  background: #f8fafc;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid #e2e8f0;
}

/* Accordion Syllabus */
.syllabus-accordion {
  display: flex;
  flex-direction: column;
  gap: 14px;
  max-width: 900px;
  margin: 0 auto;
}

.accordion-item {
  background: #ffffff;
  border: 1px solid var(--light-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}

.accordion-header {
  display: flex;
  align-items: center;
  padding: 18px 24px;
  cursor: pointer;
  gap: 18px;
  user-select: none;
  background: #ffffff;
}

.day-number {
  background: linear-gradient(135deg, var(--primary) 0%, #06b6d4 100%);
  color: #ffffff;
  font-weight: 800;
  font-size: 0.85rem;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  white-space: nowrap;
}

.day-title-info {
  flex-grow: 1;
}

.day-title-info h4 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
}

.accordion-icon {
  color: var(--text-muted);
  transition: transform var(--transition-fast);
}

.accordion-item.active .accordion-icon {
  transform: rotate(180deg);
  color: var(--primary);
}

.accordion-body {
  display: none;
  padding: 0 24px 22px 24px;
  border-top: 1px solid #f1f5f9;
}

.accordion-item.active .accordion-body {
  display: block;
}

.topic-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 14px;
}

.topic-list li {
  font-size: 0.94rem;
  color: #334155;
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.topic-list li i {
  color: var(--primary);
  margin-top: 4px;
}

/* Comparison Table */
.comparison-table-wrapper {
  overflow-x: auto;
  margin-top: 20px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  background: #fff;
}

.table-styled {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.table-styled th {
  background: #0f172a;
  color: #ffffff;
  padding: 16px 20px;
  font-size: 0.95rem;
  font-weight: 700;
}

.table-styled td {
  padding: 16px 20px;
  border-bottom: 1px solid #e2e8f0;
  font-size: 0.92rem;
}

.table-styled tr:hover td {
  background: #f8fafc;
}

/* CTA Banner Dept */
.cta-banner-dept {
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
  color: #ffffff;
  padding: 65px 0;
  border-radius: var(--radius-lg);
  margin: 40px auto;
  max-width: 1200px;
}

.cta-banner-dept h2 {
  font-size: clamp(1.8rem, 3.2vw, 2.5rem);
  font-weight: 800;
  margin-bottom: 14px;
}

.cta-banner-dept p {
  color: #cbd5e1;
  font-size: 1.05rem;
  max-width: 650px;
  margin: 0 auto 28px;
}

.cta-banner-buttons {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

@media (max-width: 992px) {
  .hero-dept-inner {
    grid-template-columns: 1fr;
  }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .dept-highlights-grid { grid-template-columns: 1fr; }
}

/* STRONG INTERNAL LINKING & HUB GRID */
.interlinks-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 20px;
  margin-top: 30px;
}

.interlink-card {
  background: #ffffff;
  border: 1.5px solid #e2e8f0;
  border-radius: var(--radius-md);
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.interlink-card:hover {
  transform: translateY(-4px);
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
}

.interlink-card.current {
  background: #f8fafc;
  border-color: #cbd5e1;
  opacity: 0.85;
}

.interlink-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.interlink-icon {
  font-size: 1.6rem;
}

.interlink-badge {
  font-size: 0.72rem;
  font-weight: 700;
  background: #eff6ff;
  color: var(--primary);
  padding: 3px 8px;
  border-radius: var(--radius-full);
  border: 1px solid #bfdbfe;
  text-transform: uppercase;
}

.interlink-title {
  font-size: 1.08rem;
  font-weight: 700;
  color: #0f172a;
  margin-bottom: 8px;
  line-height: 1.35;
}

.interlink-title a {
  color: inherit;
  text-decoration: none;
}

.interlink-title a:hover {
  color: var(--primary);
}

.interlink-desc {
  font-size: 0.86rem;
  color: #64748b;
  line-height: 1.5;
  margin-bottom: 18px;
}

.interlink-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 14px;
  border-top: 1px solid #f1f5f9;
  gap: 10px;
}

.interlink-actions a.main-link {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--primary);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.interlink-actions a.main-link:hover {
  text-decoration: underline;
}

.interlink-actions a.external-link {
  font-size: 0.78rem;
  color: #94a3b8;
  text-decoration: none;
}

.interlink-actions a.external-link:hover {
  color: #475569;
}