@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:ital,wght@0,600;0,700;0,800;0,900;1,400;1,600&family=Plus+Jakarta+Sans:wght@400;500;600;700;800&display=swap');

/* ==========================================================================
   SAATACADEMY — Main Stylesheet
   Modern, Clean, Trustworthy Academic SaaS Design
   Vanilla CSS3 (No Frameworks)
   ========================================================================== */

:root {
  /* Color Palette */
  --primary-900: #0A192F;
  --primary-800: #0F294A;
  --primary-700: #163E6E;
  --primary-600: #1E4E8C;
  --primary-500: #2563EB;
  --primary-100: #DBEAFE;
  --primary-50:  #EFF6FF;

  --accent-gold:   #F59E0B;
  --accent-gold-dark: #D97706;
  --accent-gold-light: #FEF3C7;

  --success: #10B981;
  --success-light: #ECFDF5;
  --danger:  #EF4444;
  --danger-light: #FEF2F2;
  --warning: #F59E0B;

  --text-main:    #0A1128;
  --text-muted:   #1E293B;
  --text-light:   #334155;
  --text-white:   #FFFFFF;

  --bg-page:      #F8FAFC;
  --bg-card:      #FFFFFF;
  --bg-subtle:    #F1F5F9;
  --border-color: #CBD5E1;
  --border-focus: #2563EB;

  /* Typography */
  --font-sans: 'Plus Jakarta Sans', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-academic: 'Playfair Display', Georgia, 'Times New Roman', serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* Elevation / Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(15, 23, 42, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.08), 0 2px 4px -2px rgba(15, 23, 42, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.08), 0 4px 6px -4px rgba(15, 23, 42, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(15, 23, 42, 0.1), 0 8px 10px -6px rgba(15, 23, 42, 0.06);

  /* Radius & Transitions */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;
  --transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-page);
  color: var(--text-main);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Accessibility Focus Outline */
:focus-visible {
  outline: 2px solid var(--primary-500);
  outline-offset: 2px;
}

/* Layout Container */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.container-narrow {
  max-width: 840px;
}

/* ==========================================================================
   Navigation Header
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: #FFFFFF;
  border-bottom: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.nav-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

.logo-link {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.logo-img {
  height: 52px;
  width: auto;
  max-width: 190px;
  object-fit: contain;
  display: block;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-list {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 22px;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--primary-800);
  text-decoration: none;
  padding: 6px 0;
  position: relative;
  transition: var(--transition);
}

.nav-link:hover,
.nav-link.active {
  color: var(--primary-500);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2.5px;
  background-color: var(--accent-gold);
  border-radius: 2px;
  transition: width 0.25s ease;
}

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* Hamburger button */
.mobile-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  border-radius: var(--radius-sm);
}

.mobile-toggle:focus {
  outline: 2px solid var(--primary-500);
}

.hamburger-line {
  display: block;
  width: 24px;
  height: 2.5px;
  background-color: var(--primary-800);
  margin: 5px 0;
  border-radius: 2px;
  transition: var(--transition);
}

.mobile-toggle.open .hamburger-line:nth-child(1) {
  transform: translateY(7.5px) rotate(45deg);
}
.mobile-toggle.open .hamburger-line:nth-child(2) {
  opacity: 0;
}
.mobile-toggle.open .hamburger-line:nth-child(3) {
  transform: translateY(-7.5px) rotate(-45deg);
}

/* ==========================================================================
   Buttons & CTAs
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 22px;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.2px;
  text-decoration: none;
  border-radius: var(--radius-md);
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}

.btn-primary {
  background-color: var(--primary-800);
  color: #FFFFFF;
}

.btn-primary:hover {
  background-color: var(--primary-600);
  transform: translateY(-1.5px);
  box-shadow: 0 6px 14px rgba(15, 41, 74, 0.2);
}

.btn-accent {
  background-color: var(--accent-gold);
  color: var(--primary-900);
}

.btn-accent:hover {
  background-color: var(--accent-gold-dark);
  color: #FFFFFF;
  transform: translateY(-1.5px);
  box-shadow: 0 6px 14px rgba(245, 158, 11, 0.35);
}

.btn-outline {
  background-color: transparent;
  border-color: var(--primary-800);
  color: var(--primary-800);
}

.btn-outline:hover {
  background-color: var(--primary-800);
  color: #FFFFFF;
  transform: translateY(-1.5px);
}

.btn-outline-white {
  background-color: transparent;
  border-color: #FFFFFF;
  color: #FFFFFF;
}

.btn-outline-white:hover {
  background-color: #FFFFFF;
  color: var(--primary-900);
}

.btn-sm {
  padding: 7px 14px;
  font-size: 0.85rem;
}

.btn-lg {
  padding: 14px 28px;
  font-size: 1.05rem;
}

.btn-block {
  width: 100%;
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero-section {
  padding: 64px 0 72px;
  background: linear-gradient(180deg, #FFFFFF 0%, var(--bg-page) 100%);
  border-bottom: 1px solid var(--border-color);
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  align-items: center;
  gap: 48px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background-color: var(--primary-50);
  border: 1px solid var(--primary-100);
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--primary-600);
  margin-bottom: 18px;
}

.hero-badge-dot {
  width: 8px;
  height: 8px;
  background-color: var(--success);
  border-radius: 50%;
}

.hero-heading {
  font-family: var(--font-academic);
  font-size: 3.1rem;
  line-height: 1.15;
  font-weight: 800;
  color: var(--primary-900);
  margin-bottom: 14px;
  letter-spacing: -0.5px;
}

.hero-subheading {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--accent-gold-dark);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 20px;
}

.hero-description {
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--text-main);
  line-height: 1.7;
  margin-bottom: 16px;
}

.hero-notice {
  font-family: var(--font-academic);
  font-size: 1.22rem;
  font-weight: 600;
  font-style: italic;
  line-height: 1.55;
  color: var(--primary-900);
  background-color: #F8FAFC;
  border-left: 4px solid var(--accent-gold);
  padding: 16px 22px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin-bottom: 30px;
  box-shadow: 0 2px 8px rgba(15, 23, 42, 0.04);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 36px;
}

.hero-trust {
  display: flex;
  align-items: center;
  gap: 20px;
  border-top: 1px solid var(--border-color);
  padding-top: 24px;
}

.hero-stat-item {
  display: flex;
  flex-direction: column;
}

.stat-number {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--primary-800);
}

.stat-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-light);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.hero-media {
  position: relative;
  display: flex;
  justify-content: center;
}

.hero-img {
  width: 100%;
  max-width: 600px;
  height: 380px;
  border-radius: var(--radius-lg);
  display: block;
  box-shadow: var(--shadow-xl);
  border: 2px solid var(--border-color);
  object-fit: cover;
}

/* ==========================================================================
   Section Headers & Cards
   ========================================================================== */
.section {
  padding: 72px 0;
}

.section-alt {
  background-color: #FFFFFF;
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 52px;
}

.section-tag {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 800;
  color: var(--primary-500);
  text-transform: uppercase;
  letter-spacing: 1.2px;
  margin-bottom: 8px;
}

.section-title {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--primary-900);
  line-height: 1.25;
  margin-bottom: 16px;
}

.section-description {
  font-size: 1.05rem;
  color: var(--text-main);
  line-height: 1.6;
}

/* Why Choose Us Cards */
.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  align-items: stretch;
}

.feature-card {
  background-color: #FFFFFF;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px 26px;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  height: 100%;
  box-shadow: var(--shadow-sm);
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-500);
}

.feature-icon-wrapper {
  display: none;
}

.feature-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--primary-900);
  margin: 0 0 14px 0;
  line-height: 1.35;
}

.feature-text {
  font-size: 0.98rem;
  color: var(--text-main);
  line-height: 1.65;
  margin: 0;
  flex: 1;
}

/* ==========================================================================
   Courses Grid & Cards
   ========================================================================== */
.courses-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: stretch;
}

.course-card {
  background-color: #FFFFFF;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  height: 100%;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
}

.course-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
  border-color: var(--primary-500);
}

.course-image-wrap {
  width: 100%;
  height: 210px;
  background-color: var(--primary-900);
  overflow: hidden;
  position: relative;
  flex-shrink: 0;
}

.course-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.course-card:hover .course-image {
  transform: scale(1.03);
}

.course-badge {
  position: absolute;
  top: 14px;
  left: 14px;
  background-color: var(--accent-gold);
  color: var(--primary-900);
  font-size: 0.75rem;
  font-weight: 800;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.course-body {
  padding: 26px 24px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.course-category {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--primary-500);
  text-transform: uppercase;
  letter-spacing: 0.8px;
  margin-bottom: 6px;
}

.course-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--primary-900);
  line-height: 1.35;
  margin-bottom: 12px;
  min-height: 3.4em;
  display: flex;
  align-items: flex-start;
}

.course-description {
  font-size: 0.96rem;
  color: var(--text-main);
  line-height: 1.6;
  margin-bottom: 20px;
  flex: 1;
}

.course-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--border-color);
  padding-top: 16px;
  margin-top: auto;
  font-size: 0.88rem;
  color: var(--text-light);
  font-weight: 700;
}

.course-card .btn {
  margin-top: 18px;
}

/* ==========================================================================
   Question Bank Dashboard Grid
   ========================================================================== */
.subjects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: stretch;
}

.subject-card {
  background-color: #FFFFFF;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  height: 100%;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
}

.subject-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
  border-color: var(--primary-500);
}

.subject-thumb {
  width: 100%;
  height: 180px;
  background-color: var(--primary-800);
  overflow: hidden;
  position: relative;
  flex-shrink: 0;
}

.subject-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.subject-card:hover .subject-thumb img {
  transform: scale(1.03);
}

.subject-tier-tag {
  position: absolute;
  top: 12px;
  right: 12px;
  background-color: rgba(15, 23, 42, 0.88);
  color: #FFFFFF;
  font-size: 0.75rem;
  font-weight: 800;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  display: inline-flex;
  align-items: center;
  gap: 5px;
  letter-spacing: 0.5px;
}

.tier-free {
  background-color: var(--success);
  color: #FFFFFF;
}

.subject-card-body {
  padding: 26px 24px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.subject-card-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--primary-900);
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
  line-height: 1.3;
  letter-spacing: 0.5px;
  min-height: 1.4em;
}

.subject-card-desc {
  font-size: 0.95rem;
  color: var(--text-main);
  line-height: 1.6;
  margin-bottom: 22px;
  flex: 1;
}

.subject-card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--border-color);
  padding: 14px 0 18px;
  font-size: 0.88rem;
  font-weight: 700;
}

.question-count {
  color: var(--primary-600);
  display: flex;
  align-items: center;
  gap: 6px;
}

.subject-card .btn {
  margin-top: 14px;
}

.subject-pricing-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--border-color);
  padding: 12px 0 0;
  margin-top: auto;
  font-size: 0.95rem;
}

.pricing-qcount {
  font-weight: 700;
  color: var(--primary-700);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.pricing-amount {
  font-weight: 800;
  font-size: 1.1rem;
  color: var(--primary-900);
  background-color: var(--primary-50);
  border: 1px solid var(--primary-100);
  padding: 4px 12px;
  border-radius: var(--radius-sm);
}



/* ==========================================================================
   Forms & Auth Pages
   ========================================================================== */
.auth-page {
  padding: 56px 0 80px;
  flex: 1;
  display: flex;
  align-items: center;
}

.auth-card {
  background-color: #FFFFFF;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 40px;
  width: 100%;
  max-width: 480px;
  margin: 0 auto;
}

.auth-header {
  text-align: center;
  margin-bottom: 30px;
}

.auth-title {
  font-size: 1.85rem;
  font-weight: 800;
  color: var(--primary-800);
  margin-bottom: 8px;
}

.auth-subtitle {
  font-size: 0.95rem;
  color: var(--text-muted);
}

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

.form-label {
  display: block;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--primary-800);
  margin-bottom: 6px;
}

.form-control {
  width: 100%;
  padding: 12px 14px;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  color: var(--text-main);
  background-color: #FFFFFF;
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: var(--transition);
}

.form-control:focus {
  border-color: var(--primary-500);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
  outline: none;
}

.form-control.error {
  border-color: var(--danger);
  background-color: var(--danger-light);
}

.form-hint {
  font-size: 0.8rem;
  color: var(--text-light);
  margin-top: 4px;
}

.form-error-msg {
  font-size: 0.8rem;
  color: var(--danger);
  margin-top: 4px;
  display: none;
}

.form-control.error + .form-error-msg {
  display: block;
}

.form-footer {
  text-align: center;
  margin-top: 24px;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.form-footer a {
  color: var(--primary-500);
  font-weight: 700;
  text-decoration: none;
}

.form-footer a:hover {
  text-decoration: underline;
}

/* Development prototype banner */
.dev-mode-banner {
  background-color: #FEF3C7;
  border: 1px solid #FCD34D;
  border-radius: var(--radius-md);
  padding: 12px 16px;
  font-size: 0.85rem;
  color: #92400E;
  margin-bottom: 24px;
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.dev-mode-banner strong {
  color: #78350F;
}

/* ==========================================================================
   Contact Page
   ========================================================================== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.25fr;
  gap: 48px;
}

.contact-info-card {
  background-color: var(--primary-800);
  color: #FFFFFF;
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  box-shadow: var(--shadow-lg);
}

.contact-info-card h3 {
  font-size: 1.6rem;
  font-weight: 800;
  margin-bottom: 12px;
}

.contact-info-card p {
  color: #CBD5E1;
  font-size: 0.95rem;
  margin-bottom: 32px;
}

.contact-method {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 26px;
}

.contact-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background-color: rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  flex-shrink: 0;
}

.contact-detail-title {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--accent-gold);
  letter-spacing: 0.5px;
}

.contact-detail-val {
  font-size: 1.05rem;
  font-weight: 700;
  color: #FFFFFF;
  text-decoration: none;
  display: block;
}

.contact-detail-val:hover {
  text-decoration: underline;
}

.whatsapp-action-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background-color: #25D366;
  color: #FFFFFF;
  padding: 13px 24px;
  border-radius: var(--radius-md);
  font-weight: 800;
  font-size: 0.95rem;
  text-decoration: none;
  box-shadow: 0 4px 12px rgba(37, 211, 102, 0.3);
  transition: var(--transition);
  margin-top: 12px;
}

.whatsapp-action-btn:hover {
  background-color: #20BD5A;
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(37, 211, 102, 0.45);
}

/* ==========================================================================
   Policy & Legal Content
   ========================================================================== */
.policy-card {
  background-color: #FFFFFF;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 48px;
  box-shadow: var(--shadow-sm);
  margin-bottom: 40px;
}

.policy-card h2 {
  font-size: 1.95rem;
  font-weight: 900;
  color: var(--primary-900);
  border-bottom: 2px solid var(--primary-100);
  padding-bottom: 14px;
  margin-bottom: 24px;
}

.policy-card h3 {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--primary-900);
  margin: 32px 0 14px;
}

.policy-card h4 {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--primary-800);
  margin: 22px 0 10px;
}

.policy-card p, .policy-card li {
  font-size: 1.02rem;
  color: var(--text-main);
  line-height: 1.75;
  margin-bottom: 14px;
}

.policy-card strong {
  color: #000000;
  font-weight: 800;
}

.policy-card ul {
  padding-left: 24px;
  margin-bottom: 20px;
}

.policy-disclaimer {
  background-color: var(--primary-50);
  border-left: 4px solid var(--primary-500);
  padding: 16px 20px;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  font-size: 0.92rem;
  color: var(--primary-800);
  margin: 24px 0;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  background-color: var(--primary-900);
  color: #CBD5E1;
  padding: 36px 0;
  margin-top: auto;
  border-top: 3px solid var(--accent-gold);
}

.footer-bottom {
  text-align: center;
  font-size: 0.95rem;
  color: #94A3B8;
}

/* ==========================================================================
   Toast Notification & Utilities
   ========================================================================== */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background-color: var(--primary-900);
  color: #FFFFFF;
  padding: 14px 22px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-xl);
  font-size: 0.92rem;
  font-weight: 600;
  z-index: 9999;
  display: flex;
  align-items: center;
  gap: 12px;
  opacity: 0;
  transform: translateY(20px);
  transition: var(--transition);
  pointer-events: none;
}

.toast.show {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

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

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