/* ============================================================
   Fraley Tutors — Design System & Styles
   Palette: Dark slate + vibrant teal
   Typography: Inter (Google Fonts) + system fallback
   ============================================================ */

:root {
  /* Palette */
  --color-primary: #00cec9;
  --color-primary-dark: #00b3ae;
  --color-primary-light: rgba(0, 206, 201, 0.1);
  --color-dark: #2d3436;
  --color-dark-deep: #1e2526;
  --color-light: #f7f9fa;
  --color-white: #ffffff;
  --color-text: #2d3436;
  --color-text-secondary: #636e72;
  --color-text-light: #ecf0f1;
  --color-border: #dfe6e9;
  --color-star: #f4b400;
  --color-success: #00b894;

  /* Typography */
  --font-heading: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;

  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2.5rem;
  --space-xl: 4rem;
  --space-2xl: 6rem;

  /* Layout */
  --container-max: 1120px;
  --container-narrow: 720px;
  --nav-height: 72px;
  --border-radius: 8px;
  --border-radius-lg: 12px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.12);

  /* Transitions */
  --transition: 0.2s ease;
}

/* --- Reset & Base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--color-text);
  background: var(--color-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: var(--color-primary-dark);
  text-decoration: none;
  transition: color var(--transition);
}
a:hover { color: var(--color-primary); }

ul, ol { list-style: none; }

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.25;
  color: var(--color-text);
}

/* --- Layout --- */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.container-narrow {
  max-width: var(--container-narrow);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

/* --- Navigation --- */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-height);
  background: var(--color-dark-deep);
  z-index: 1000;
  display: flex;
  align-items: center;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.navbar-logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--color-white);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.01em;
  text-decoration: none;
}
.navbar-logo img { height: 36px; width: auto; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.nav-links a {
  color: rgba(255,255,255,0.75);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 0.5rem 0.85rem;
  border-radius: 6px;
  transition: all var(--transition);
  text-decoration: none;
}
.nav-links a:hover,
.nav-links a.active {
  color: var(--color-white);
  background: rgba(255,255,255,0.08);
}

.nav-login-btn {
  background: var(--color-primary) !important;
  color: var(--color-dark) !important;
  font-weight: 600 !important;
  padding: 0.5rem 1.1rem !important;
  margin-left: 0.5rem;
}
.nav-login-btn:hover {
  background: var(--color-primary-dark) !important;
  color: var(--color-white) !important;
}

.nav-spacer { height: var(--nav-height); }

/* Hamburger */
.nav-hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  flex-direction: column;
  gap: 5px;
}
.nav-hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-white);
  border-radius: 2px;
  transition: all 0.3s ease;
}
.navbar.nav-open .nav-hamburger span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.navbar.nav-open .nav-hamburger span:nth-child(2) { opacity: 0; }
.navbar.nav-open .nav-hamburger span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* --- Buttons --- */
.btn {
  display: inline-block;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.75rem 1.75rem;
  border-radius: var(--border-radius);
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: all var(--transition);
  text-align: center;
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-dark);
}
.btn-primary:hover {
  background: var(--color-primary-dark);
  color: var(--color-white);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0,206,201,0.3);
}

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}
.btn-outline:hover {
  background: var(--color-primary);
  color: var(--color-dark);
}

.btn-white {
  background: var(--color-white);
  color: var(--color-dark);
}
.btn-white:hover {
  background: var(--color-light);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-large { font-size: 1.05rem; padding: 0.9rem 2.25rem; }
.btn-small { font-size: 0.85rem; padding: 0.5rem 1.25rem; }

/* --- Sections --- */
.section { padding: var(--space-2xl) 0; }
.section-dark { background: var(--color-dark); color: var(--color-text-light); }
.section-dark h2, .section-dark h3 { color: var(--color-white); }
.section-light { background: var(--color-light); }
.section-white { background: var(--color-white); }

.section-title {
  font-size: 2rem;
  margin-bottom: 0.75rem;
  letter-spacing: -0.02em;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--color-text-secondary);
  max-width: 600px;
  line-height: 1.6;
}
.section-dark .section-subtitle { color: rgba(255,255,255,0.7); }

.section-header { margin-bottom: var(--space-xl); }
.text-center { text-align: center; }
.text-center .section-subtitle { margin-left: auto; margin-right: auto; }

/* --- Hero --- */
.hero {
  background: var(--color-dark);
  color: var(--color-text-light);
  padding: var(--space-2xl) 0;
  min-height: 520px;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
}

/* Subtle graph-paper grid */
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0,206,201,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,206,201,0.04) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
}

/* Teal gradient glow */
.hero::after {
  content: '';
  position: absolute;
  top: -30%; right: -10%;
  width: 700px; height: 700px;
  background: radial-gradient(circle, rgba(0,206,201,0.08) 0%, transparent 65%);
  pointer-events: none;
}

/* Floating maths/physics equations */
.hero-equations {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}

.hero-eq {
  position: absolute;
  font-family: 'Times New Roman', Georgia, serif;
  font-style: italic;
  color: rgba(0,206,201,0.12);
  white-space: nowrap;
  user-select: none;
}

.hero-eq:nth-child(1) { font-size: 1.4rem; transform: rotate(-8deg); }
.hero-eq:nth-child(2) { font-size: 1.1rem; transform: rotate(5deg); }
.hero-eq:nth-child(3) { font-size: 1.15rem; transform: rotate(-3deg); }
.hero-eq:nth-child(4) { font-size: 0.95rem; transform: rotate(12deg); }
.hero-eq:nth-child(5) { font-size: 1rem; transform: rotate(-6deg); }
.hero-eq:nth-child(6) { font-size: 1.2rem; transform: rotate(3deg); }
.hero-eq:nth-child(7) { font-size: 0.9rem; transform: rotate(-10deg); }
.hero-eq:nth-child(8) { font-size: 1.1rem; transform: rotate(7deg); }

.hero h1 {
  font-size: 3rem;
  color: var(--color-white);
  max-width: 680px;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: var(--space-md);
}

.hero-subtitle {
  font-size: 1.2rem;
  color: rgba(255,255,255,0.75);
  max-width: 560px;
  line-height: 1.65;
  margin-bottom: var(--space-lg);
}

.hero-ctas {
  display: flex;
  gap: var(--space-sm);
  align-items: center;
  flex-wrap: wrap;
}

/* --- Trust Bar --- */
.trust-bar {
  background: var(--color-dark-deep);
  border-top: 1px solid rgba(255,255,255,0.06);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  padding: var(--space-md) 0;
}

.trust-bar-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
  text-align: center;
}

.trust-number {
  display: block;
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 0.15rem;
}

.trust-label {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.6);
}

/* --- USP Cards --- */
.usp-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

.usp-card { padding: var(--space-lg); }

.usp-icon {
  width: 48px; height: 48px;
  background: var(--color-primary-light);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  margin-bottom: var(--space-md);
  color: var(--color-primary-dark);
}

.usp-card h3 { font-size: 1.15rem; margin-bottom: 0.5rem; }
.usp-card p { color: var(--color-text-secondary); font-size: 0.95rem; line-height: 1.6; }

/* --- Subject Tags --- */
.subjects-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
}

.subject-tag {
  display: inline-block;
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
  font-weight: 600;
  font-size: 0.9rem;
  padding: 0.55rem 1.25rem;
  border-radius: 50px;
  border: 1px solid rgba(0,206,201,0.2);
  text-decoration: none;
  transition: all var(--transition);
}
.subject-tag:hover {
  background: var(--color-primary);
  color: var(--color-dark);
  border-color: var(--color-primary);
}

/* --- Steps --- */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
}

.step { text-align: center; }

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px; height: 44px;
  background: var(--color-primary);
  color: var(--color-dark);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.1rem;
  border-radius: 50%;
  margin-bottom: var(--space-sm);
}

.step h3 { font-size: 1.05rem; margin-bottom: 0.4rem; }
.step p { color: var(--color-text-secondary); font-size: 0.9rem; line-height: 1.55; }

/* --- Cards (general) --- */
.card {
  background: var(--color-white);
  border-radius: var(--border-radius-lg);
  padding: var(--space-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  transition: all var(--transition);
}
.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

/* --- Review Cards --- */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
}

.review-card {
  padding: var(--space-md) var(--space-lg);
  padding-top: calc(var(--space-md) + 8px);
  position: relative;
  border-left: 3px solid var(--color-primary);
}

.review-card::before {
  content: '\201C';
  position: absolute;
  top: 12px;
  right: 16px;
  font-size: 3rem;
  line-height: 1;
  color: var(--color-primary-light);
  font-family: Georgia, serif;
  pointer-events: none;
}

.review-stars {
  color: var(--color-star);
  font-size: 1rem;
  margin-bottom: 0.75rem;
  letter-spacing: 2px;
}

.review-text {
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--color-text);
  margin-bottom: var(--space-sm);
}

.review-author {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  font-weight: 600;
}

.review-subject {
  font-size: 0.8rem;
  color: var(--color-text-secondary);
}

/* --- Tutor Cards --- */
.tutors-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

.tutor-card {
  text-align: center;
  padding: var(--space-lg);
  border-top: 3px solid transparent;
  transition: all var(--transition);
}
.tutor-card:hover {
  border-top-color: var(--color-primary);
}
.tutor-card:hover .tutor-photo {
  border-color: var(--color-primary);
}

.tutor-photo {
  width: 120px; height: 120px;
  border-radius: 50%;
  object-fit: cover;
  object-position: top;
  margin: 0 auto var(--space-md);
  background: var(--color-light);
  border: 3px solid var(--color-border);
}

.tutor-name { font-size: 1.15rem; margin-bottom: 0.2rem; }

.tutor-role {
  font-size: 0.85rem;
  color: var(--color-primary-dark);
  font-weight: 600;
  margin-bottom: 0.35rem;
}

.tutor-university {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-sm);
}

.tutor-subjects {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  justify-content: center;
  margin-bottom: var(--space-sm);
}

.tutor-subject-badge {
  font-size: 0.75rem;
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
  padding: 0.2rem 0.6rem;
  border-radius: 50px;
  font-weight: 500;
}

.tutor-bio {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* Founder cards — larger horizontal treatment */
.founders-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-lg);
  margin-bottom: var(--space-xl);
}

.tutor-card-founder {
  display: flex;
  gap: var(--space-lg);
  text-align: left;
  padding: var(--space-lg);
  align-items: flex-start;
  border-left: 3px solid transparent;
  transition: all var(--transition);
}
.tutor-card-founder:hover {
  border-left-color: var(--color-primary);
}
.tutor-card-founder:hover .tutor-photo {
  border-color: var(--color-primary);
}

.tutor-card-founder .tutor-photo {
  width: 140px; height: 140px;
  margin: 0;
  flex-shrink: 0;
}

.tutor-card-founder .tutor-subjects { justify-content: flex-start; }

.tutor-credentials {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  margin-bottom: 0.5rem;
  line-height: 1.5;
}

/* --- Feature Cards (services) --- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-lg);
}

.feature-card {
  padding: var(--space-lg);
  display: flex;
  gap: var(--space-md);
  align-items: flex-start;
}

.feature-icon {
  width: 48px; height: 48px; min-width: 48px;
  background: var(--color-primary-light);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  color: var(--color-primary-dark);
}

.feature-card h3 { font-size: 1.05rem; margin-bottom: 0.4rem; }
.feature-card p { font-size: 0.9rem; color: var(--color-text-secondary); line-height: 1.6; }

/* --- Platform Showcase (services) --- */
.platform-feature {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  align-items: center;
  margin-bottom: var(--space-xl);
}

.platform-feature:nth-child(even) { direction: rtl; }
.platform-feature:nth-child(even) > * { direction: ltr; }
.platform-feature:last-child { margin-bottom: 0; }

.platform-feature-text h3 { font-size: 1.3rem; margin-bottom: 0.5rem; }
.platform-feature-text p { font-size: 0.95rem; color: var(--color-text-secondary); line-height: 1.65; }

.platform-feature-visual {
  display: flex;
  align-items: center;
  justify-content: center;
}

/* --- Platform Screenshot Frame --- */
.platform-screenshot-frame {
  background: var(--color-dark-deep);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg), 0 0 0 1px rgba(0,0,0,0.06);
  transition: transform var(--transition), box-shadow var(--transition);
}
.platform-screenshot-frame:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0,0,0,0.18), 0 0 0 1px rgba(0,0,0,0.06);
}

.screenshot-dots {
  display: flex;
  gap: 6px;
  padding: 10px 14px;
  background: var(--color-dark-deep);
}
.screenshot-dots span {
  width: 10px; height: 10px;
  border-radius: 50%;
  background: rgba(255,255,255,0.15);
}
.screenshot-dots span:first-child { background: #ff5f57; }
.screenshot-dots span:nth-child(2) { background: #ffbd2e; }
.screenshot-dots span:last-child { background: #28c840; }

.platform-screenshot-frame img {
  display: block;
  width: 100%;
  height: auto;
}

/* --- Pricing Card --- */
.pricing-card {
  max-width: 520px;
  margin: 0 auto;
  text-align: center;
  padding: var(--space-xl);
  border: 2px solid var(--color-primary);
  box-shadow: 0 0 40px rgba(0,206,201,0.08), var(--shadow-md);
}
.pricing-card:hover {
  box-shadow: 0 0 50px rgba(0,206,201,0.12), var(--shadow-lg);
}

.pricing-amount {
  font-family: var(--font-heading);
  font-size: 3.5rem;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.03em;
}

.pricing-period {
  font-size: 1.2rem;
  color: var(--color-text-secondary);
  font-weight: 400;
}

.pricing-includes {
  text-align: left;
  margin: var(--space-lg) 0;
}

.pricing-includes li {
  padding: 0.5rem 0 0.5rem 1.75rem;
  position: relative;
  font-size: 0.95rem;
  border-bottom: 1px solid var(--color-border);
}
.pricing-includes li:last-child { border-bottom: none; }
.pricing-includes li::before {
  content: '\2713';
  position: absolute;
  left: 0;
  color: var(--color-primary-dark);
  font-weight: 700;
}

.pricing-note {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  margin-top: var(--space-md);
  line-height: 1.6;
}

/* --- FAQ --- */
.faq-list { max-width: 700px; margin: 0 auto; }

.faq-item {
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-md) 0;
}

.faq-question {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1rem;
  margin-bottom: 0.4rem;
}

.faq-answer {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.faq-icon {
  vertical-align: -3px;
  margin-right: 6px;
  flex-shrink: 0;
}

/* --- Comparison Table --- */
.comparison-table {
  max-width: 700px;
  margin: 0 auto;
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  background: var(--color-white);
}

.comparison-header {
  display: grid;
  grid-template-columns: 1fr 100px 100px;
  background: var(--color-dark);
  color: var(--color-text-light);
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.85rem;
}

.comparison-feature-header {
  padding: 0.75rem 1.25rem;
}

.comparison-col-header {
  padding: 0.75rem 0.5rem;
  text-align: center;
}

.comparison-col-ft {
  background: var(--color-primary);
  color: var(--color-dark);
  font-weight: 700;
}

.comparison-row {
  display: grid;
  grid-template-columns: 1fr 100px 100px;
  border-bottom: 1px solid var(--color-border);
  align-items: center;
}
.comparison-row:last-child { border-bottom: none; }

.comparison-feature {
  padding: 0.75rem 1.25rem;
  font-size: 0.95rem;
}

.comparison-check,
.comparison-cross,
.comparison-varies {
  text-align: center;
  padding: 0.75rem 0.5rem;
}

.comparison-check {
  background: rgba(0, 206, 201, 0.06);
}

.comparison-varies {
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  font-style: italic;
}

/* --- Pricing Testimonial --- */
.pricing-testimonial {
  max-width: 700px;
  margin: 0 auto;
  text-align: center;
}

.pricing-testimonial-quote svg {
  margin: 0 auto var(--space-sm);
  display: block;
  opacity: 0.6;
}

.pricing-testimonial-quote blockquote {
  font-size: 1.1rem;
  line-height: 1.7;
  color: var(--color-text);
  font-style: italic;
  margin-bottom: var(--space-sm);
}

.pricing-testimonial-quote cite {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  font-style: normal;
  font-weight: 600;
}

/* --- Reviews Stats Strip --- */
.reviews-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
  text-align: center;
  max-width: 700px;
  margin: 0 auto;
  padding: var(--space-lg) 0;
}

.reviews-stat-number {
  display: block;
  font-family: var(--font-heading);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 0.15rem;
}

.reviews-stat-label {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
}

/* --- CTA Section --- */
.cta-section {
  background: var(--color-dark);
  color: var(--color-text-light);
  text-align: center;
  padding: var(--space-xl) 0;
  border-top: 3px solid var(--color-primary);
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0,206,201,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,206,201,0.03) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
}

.cta-section h2 {
  color: var(--color-white);
  font-size: 1.75rem;
  margin-bottom: 0.5rem;
}

.cta-section p {
  color: rgba(255,255,255,0.7);
  margin-bottom: var(--space-lg);
  font-size: 1.05rem;
}

/* --- Founder Section (homepage) --- */
.founder-section {
  position: relative;
  overflow: hidden;
  border-top: 3px solid var(--color-primary);
}

.founder-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0,206,201,0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,206,201,0.035) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
}

.founder-feature {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
  max-width: 880px;
  margin: 0 auto;
}

.founder-feature-photo {
  width: 200px; height: 200px;
  border-radius: var(--border-radius-lg);
  object-fit: cover;
  flex-shrink: 0;
  border: 3px solid rgba(255,255,255,0.1);
  box-shadow: 0 8px 30px rgba(0,0,0,0.3);
}

.founder-label {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-primary);
  margin-bottom: 0.25rem;
}

.founder-feature-text h2 {
  color: var(--color-white);
  font-size: 1.75rem;
  margin-bottom: 0.75rem;
}

.founder-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: var(--space-md);
}

.founder-tag {
  display: inline-block;
  background: rgba(0,206,201,0.12);
  color: var(--color-primary);
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.3rem 0.75rem;
  border-radius: 50px;
  border: 1px solid rgba(0,206,201,0.2);
}

.founder-feature-text p {
  font-size: 0.95rem;
  color: rgba(255,255,255,0.7);
  line-height: 1.65;
}

/* --- About Page --- */
.about-content { max-width: 740px; }
.about-content p {
  font-size: 1.05rem;
  line-height: 1.75;
  margin-bottom: var(--space-md);
}
.about-content p:last-child { margin-bottom: 0; }

/* About hero — photo alongside story */
.about-hero {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: var(--space-xl);
  align-items: start;
  max-width: none;
}

.about-hero-photo {
  width: 100%;
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-lg);
  border: 4px solid var(--color-white);
  outline: 1px solid var(--color-border);
  position: sticky;
  top: calc(var(--nav-height) + var(--space-lg));
}

.about-hero .about-content { max-width: none; }

.about-credentials {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: var(--space-md);
}

.about-credential-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.3rem 0.75rem;
  border-radius: 50px;
  border: 1px solid rgba(0,206,201,0.2);
}

/* Philosophy cards — visual treatment */
.philosophy-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-lg);
}

.philosophy-item {
  padding: var(--space-lg);
  background: var(--color-white);
  border-radius: var(--border-radius-lg);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
  position: relative;
  padding-left: calc(var(--space-lg) + 4px);
  border-left: 4px solid var(--color-primary);
}
.philosophy-item:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.philosophy-item h3 { font-size: 1.05rem; margin-bottom: 0.4rem; }
.philosophy-item p { font-size: 0.95rem; color: var(--color-text-secondary); line-height: 1.6; }

/* Differentiator cards (about page) */
.differentiators-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

.differentiator-card {
  text-align: center;
  padding: var(--space-lg);
}

.differentiator-icon {
  width: 56px; height: 56px;
  background: var(--color-primary-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-md);
  color: var(--color-primary-dark);
}

.differentiator-card h3 { font-size: 1.05rem; margin-bottom: 0.4rem; }
.differentiator-card p { font-size: 0.95rem; color: var(--color-text-secondary); line-height: 1.6; }

/* International banner (about page) */
.international-banner {
  display: flex;
  align-items: flex-start;
  gap: var(--space-lg);
  max-width: 740px;
  padding: var(--space-lg);
  background: var(--color-white);
  border-radius: var(--border-radius-lg);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.international-icon {
  width: 56px; height: 56px; min-width: 56px;
  background: var(--color-primary-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary-dark);
}

.international-banner h3 { font-size: 1.1rem; margin-bottom: 0.35rem; }
.international-banner p { font-size: 0.95rem; color: var(--color-text-secondary); line-height: 1.6; }

/* --- Trustpilot --- */
.trustpilot-banner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  padding: var(--space-lg);
  background: var(--color-light);
  border-radius: var(--border-radius-lg);
  text-align: center;
  flex-wrap: wrap;
}

.trustpilot-score {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 700;
}

.trustpilot-stars {
  color: var(--color-star);
  font-size: 1.5rem;
  letter-spacing: 3px;
}

.trustpilot-text {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
}
.trustpilot-text a { font-weight: 600; }

/* --- Contact --- */
.contact-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: var(--space-xl);
  align-items: start;
}

.form-group { margin-bottom: var(--space-md); }

.form-label {
  display: block;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.9rem;
  margin-bottom: 0.35rem;
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 0.7rem 0.9rem;
  font-family: var(--font-body);
  font-size: 0.95rem;
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  background: var(--color-white);
  color: var(--color-text);
  transition: border-color var(--transition);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
}

.form-textarea { resize: vertical; min-height: 100px; }

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
}

.form-hint {
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  margin-top: 0.25rem;
}

.contact-info-card {
  padding: var(--space-lg);
  background: var(--color-light);
  border-radius: var(--border-radius-lg);
}

.contact-info-item {
  display: flex;
  gap: var(--space-sm);
  align-items: flex-start;
  margin-bottom: var(--space-md);
}
.contact-info-item:last-child { margin-bottom: 0; }

.contact-info-icon { font-size: 1.2rem; flex-shrink: 0; margin-top: 0.1rem; color: var(--color-primary-dark); }

.form-trust-note {
  margin-top: var(--space-sm);
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  line-height: 1.5;
}
.contact-info-item h4 { font-size: 0.95rem; margin-bottom: 0.15rem; }
.contact-info-item p { font-size: 0.9rem; color: var(--color-text-secondary); line-height: 1.5; }

.expect-list li {
  padding: 0.5rem 0 0.5rem 1.75rem;
  position: relative;
  font-size: 0.95rem;
}
.expect-list li::before {
  content: '\2713';
  position: absolute;
  left: 0;
  color: var(--color-primary-dark);
  font-weight: 700;
}

/* --- Footer --- */
.footer {
  background: var(--color-dark-deep);
  color: var(--color-text-light);
  padding: var(--space-xl) 0 var(--space-md);
  position: relative;
  overflow: hidden;
}

.footer::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0,206,201,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,206,201,0.025) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: var(--space-xl);
  margin-bottom: var(--space-xl);
}

.footer-about .navbar-logo { margin-bottom: var(--space-sm); }
.footer-about p {
  font-size: 0.9rem;
  color: rgba(255,255,255,0.6);
  line-height: 1.6;
  max-width: 320px;
}

.footer-heading {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: rgba(255,255,255,0.5);
  margin-bottom: var(--space-md);
}

.footer-links li { margin-bottom: 0.5rem; }
.footer-links a {
  color: rgba(255,255,255,0.7);
  font-size: 0.9rem;
}
.footer-links a:hover { color: var(--color-primary); }

.footer-contact-item {
  display: flex;
  gap: 0.6rem;
  margin-bottom: 0.6rem;
  font-size: 0.9rem;
  color: rgba(255,255,255,0.7);
  align-items: flex-start;
}

.footer-bar {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-top: var(--space-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  color: rgba(255,255,255,0.4);
}
.footer-bar a { color: rgba(255,255,255,0.4); }
.footer-bar a:hover { color: var(--color-primary); }

.footer-trustpilot {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.footer-trustpilot .stars { color: var(--color-star); letter-spacing: 1px; }

/* --- Utility --- */
.loading-spinner {
  width: 36px; height: 36px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: var(--space-lg) auto;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* --- Skeleton Loading --- */
@keyframes skeleton-pulse {
  0%, 100% { opacity: 0.4; }
  50% { opacity: 0.7; }
}

.skeleton-bar {
  background: var(--color-border);
  border-radius: 4px;
  animation: skeleton-pulse 1.5s ease-in-out infinite;
}

.skeleton-circle {
  background: var(--color-border);
  border-radius: 50%;
  animation: skeleton-pulse 1.5s ease-in-out infinite;
}

/* Skeleton tutor card */
.skeleton-tutor-card {
  padding: var(--space-lg);
  text-align: center;
  background: var(--color-white);
  border-radius: var(--border-radius-lg);
  border: 1px solid var(--color-border);
}
.skeleton-tutor-card .skeleton-circle {
  width: 120px; height: 120px;
  margin: 0 auto var(--space-md);
}
.skeleton-tutor-card .skeleton-bar {
  height: 14px;
  margin: 0 auto 8px;
}
.skeleton-tutor-card .skeleton-bar:nth-child(2) { width: 60%; }
.skeleton-tutor-card .skeleton-bar:nth-child(3) { width: 45%; height: 12px; }
.skeleton-tutor-card .skeleton-bar:nth-child(4) { width: 80%; height: 12px; margin-top: 16px; }
.skeleton-tutor-card .skeleton-bar:nth-child(5) { width: 90%; height: 12px; }

/* Skeleton review card */
.skeleton-review-card {
  padding: var(--space-md) var(--space-lg);
  background: var(--color-white);
  border-radius: var(--border-radius-lg);
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-border);
}
.skeleton-review-card .skeleton-bar:nth-child(1) { width: 35%; height: 12px; margin-bottom: 12px; }
.skeleton-review-card .skeleton-bar:nth-child(2) { width: 100%; height: 12px; margin-bottom: 6px; }
.skeleton-review-card .skeleton-bar:nth-child(3) { width: 85%; height: 12px; margin-bottom: 6px; }
.skeleton-review-card .skeleton-bar:nth-child(4) { width: 60%; height: 12px; margin-bottom: 16px; }
.skeleton-review-card .skeleton-bar:nth-child(5) { width: 30%; height: 10px; }

/* Skeleton founder card */
.skeleton-founder-card {
  display: flex;
  gap: var(--space-lg);
  padding: var(--space-lg);
  background: var(--color-white);
  border-radius: var(--border-radius-lg);
  border: 1px solid var(--color-border);
  align-items: flex-start;
}
.skeleton-founder-card .skeleton-circle {
  width: 140px; height: 140px;
  flex-shrink: 0;
}
.skeleton-founder-card .skeleton-text { flex: 1; }
.skeleton-founder-card .skeleton-bar { margin-bottom: 8px; }
.skeleton-founder-card .skeleton-bar:nth-child(1) { width: 50%; height: 16px; }
.skeleton-founder-card .skeleton-bar:nth-child(2) { width: 35%; height: 12px; }
.skeleton-founder-card .skeleton-bar:nth-child(3) { width: 70%; height: 12px; margin-top: 12px; }
.skeleton-founder-card .skeleton-bar:nth-child(4) { width: 90%; height: 12px; }
.skeleton-founder-card .skeleton-bar:nth-child(5) { width: 80%; height: 12px; }

.empty-state {
  text-align: center;
  padding: var(--space-xl) var(--space-md);
  color: var(--color-text-secondary);
  font-size: 0.95rem;
}

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

.mb-0 { margin-bottom: 0; }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }

/* --- Maths Background Motif (dark sections only) --- */
.maths-bg {
  position: relative;
  overflow: hidden;
}

.maths-bg::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0,206,201,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,206,201,0.04) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
}

.maths-bg-equations {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}

.maths-bg-eq {
  position: absolute;
  font-family: 'Times New Roman', Georgia, serif;
  font-style: italic;
  color: rgba(0,206,201,0.12);
  white-space: nowrap;
  user-select: none;
  font-size: 1.15rem;
}

/* --- Section Dividers --- */
.section-curve-top {
  position: relative;
}
.section-curve-top::before {
  content: '';
  position: absolute;
  top: -1px; left: 0; right: 0;
  height: 40px;
  background: inherit;
  clip-path: ellipse(55% 100% at 50% 100%);
  z-index: 1;
}

/* Teal accent line between sections */
.section-accent-top {
  border-top: 3px solid var(--color-primary);
}

/* --- Subject & Blog Pages --- */
.hero-short {
  min-height: auto;
  padding: var(--space-2xl) 0 var(--space-xl);
}

.section-alt {
  background: var(--color-light);
}

.card-grid {
  display: grid;
  gap: var(--space-md);
}
.card-grid-1 { grid-template-columns: 1fr; }
.card-grid-2 { grid-template-columns: repeat(2, 1fr); }
.card-grid-3 { grid-template-columns: repeat(3, 1fr); }
.card-grid-4 { grid-template-columns: repeat(2, 1fr); }

.card-grid .card h3 {
  font-size: 1.05rem;
  margin-bottom: 0.4rem;
}
.card-grid .card p {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* Blog article styles */
.blog-article {
  max-width: var(--container-narrow);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.blog-meta {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-lg);
}

.blog-article h2 {
  font-size: 1.4rem;
  margin: var(--space-lg) 0 var(--space-sm);
}

.blog-article p {
  margin-bottom: var(--space-sm);
  line-height: 1.75;
}

.blog-article ul, .blog-article ol {
  margin: var(--space-sm) 0 var(--space-md) var(--space-md);
  list-style: disc;
}
.blog-article ol { list-style: decimal; }
.blog-article li {
  margin-bottom: 0.4rem;
  line-height: 1.65;
  font-size: 0.95rem;
  color: var(--color-text-secondary);
}

.blog-cta-inline {
  background: var(--color-primary-light);
  border-left: 3px solid var(--color-primary);
  padding: var(--space-md) var(--space-lg);
  margin: var(--space-lg) 0;
  border-radius: var(--border-radius);
}
.blog-cta-inline p { margin-bottom: 0.5rem; }

/* Blog listing */
.blog-listing {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
  max-width: var(--container-narrow);
  margin: 0 auto;
}

.blog-listing-card {
  display: block;
  padding: var(--space-lg);
  border-left: 3px solid var(--color-primary);
  transition: all var(--transition);
  color: inherit;
}
.blog-listing-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  color: inherit;
}
.blog-listing-card h3 {
  font-size: 1.1rem;
  margin-bottom: 0.4rem;
}
.blog-listing-card p {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin-bottom: 0.5rem;
}
.blog-listing-card .blog-card-meta {
  font-size: 0.8rem;
  color: var(--color-text-secondary);
}

@media (max-width: 960px) {
  .card-grid-4 { grid-template-columns: 1fr; }
  .card-grid-3 { grid-template-columns: 1fr; }
}

/* --- Scroll Animations --- */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

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

/* Stagger children in grids */
.fade-in-stagger > * {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.4s ease, transform 0.4s ease;
}

.fade-in-stagger.visible > * {
  opacity: 1;
  transform: translateY(0);
}

.fade-in-stagger.visible > *:nth-child(1) { transition-delay: 0s; }
.fade-in-stagger.visible > *:nth-child(2) { transition-delay: 0.08s; }
.fade-in-stagger.visible > *:nth-child(3) { transition-delay: 0.16s; }
.fade-in-stagger.visible > *:nth-child(4) { transition-delay: 0.24s; }
.fade-in-stagger.visible > *:nth-child(5) { transition-delay: 0.32s; }

/* Respect prefers-reduced-motion */
@media (prefers-reduced-motion: reduce) {
  .fade-in,
  .fade-in-stagger > * {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* Mobile CTA bar — hidden on desktop, shown by mobile.css */
.mobile-cta-bar { display: none; }

/* ============================================================
   Responsive — Tablet (960px)
   ============================================================ */
@media (max-width: 960px) {
  .usp-grid { grid-template-columns: 1fr; gap: var(--space-md); }
  .steps-grid { grid-template-columns: repeat(2, 1fr); }
  .reviews-grid { grid-template-columns: repeat(2, 1fr); }
  .tutors-grid { grid-template-columns: repeat(2, 1fr); }
  .founders-grid { grid-template-columns: 1fr; }
  .features-grid { grid-template-columns: 1fr; }
  .platform-feature { grid-template-columns: 1fr; gap: var(--space-lg); }
  .platform-feature:nth-child(even) { direction: ltr; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: var(--space-lg); }
  .philosophy-grid { grid-template-columns: 1fr; }
  .about-hero { grid-template-columns: 200px 1fr; gap: var(--space-lg); }
  .differentiators-grid { grid-template-columns: 1fr; }
  .international-banner { flex-direction: column; align-items: center; text-align: center; }
  .trust-bar-grid { grid-template-columns: repeat(2, 1fr); }
  .reviews-stats { grid-template-columns: repeat(2, 1fr); }
}

/* ============================================================
   Responsive — Mobile (768px)
   ============================================================ */
@media (max-width: 768px) {
  :root { --space-2xl: 3.5rem; --space-xl: 2.5rem; }

  .nav-hamburger { display: flex; }
  .nav-links {
    display: none;
    position: absolute;
    top: var(--nav-height);
    left: 0; right: 0;
    background: var(--color-dark-deep);
    flex-direction: column;
    padding: var(--space-sm) var(--space-md) var(--space-md);
    border-top: 1px solid rgba(255,255,255,0.06);
    gap: 0;
  }
  .navbar.nav-open .nav-links { display: flex; }
  .nav-links li { width: 100%; }
  .nav-links a { display: block; padding: 0.75rem 0.85rem; }
  .nav-login-btn { margin-left: 0 !important; margin-top: 0.5rem; text-align: center; }

  .hero { min-height: auto; padding: var(--space-xl) 0; }
  .hero h1 { font-size: 2rem; }
  .hero-subtitle { font-size: 1.05rem; }
  .section-title { font-size: 1.6rem; }

  .steps-grid { grid-template-columns: 1fr; gap: var(--space-md); }
  .reviews-grid { grid-template-columns: 1fr; }
  .tutors-grid { grid-template-columns: 1fr; }

  .tutor-card-founder {
    flex-direction: column;
    text-align: center;
    align-items: center;
  }
  .tutor-card-founder .tutor-photo { margin-bottom: var(--space-sm); }
  .tutor-card-founder .tutor-subjects { justify-content: center; }

  .founder-feature { flex-direction: column; text-align: center; }
  .founder-feature-photo { width: 160px; height: 160px; }
  .founder-tags { justify-content: center; }
  .about-hero {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .about-hero-photo {
    width: 200px;
    margin: 0 auto var(--space-md);
    position: static;
  }
  .about-credentials { justify-content: center; }
  .hero-equations { display: none; }
  .maths-bg-equations { display: none; }
  .form-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: var(--space-lg); }
  .footer-bar { flex-direction: column; gap: var(--space-sm); text-align: center; }

  .pricing-amount { font-size: 2.75rem; }
  .trust-bar-grid { grid-template-columns: repeat(2, 1fr); gap: var(--space-sm); }
  .trust-number { font-size: 1.25rem; }
  .comparison-header,
  .comparison-row { grid-template-columns: 1fr 80px 80px; }
  .comparison-feature { font-size: 0.85rem; padding: 0.6rem 0.75rem; }
  .reviews-stats { grid-template-columns: repeat(2, 1fr); gap: var(--space-sm); }
  .reviews-stat-number { font-size: 1.4rem; }
}

/* ============================================================
   Responsive — Small Mobile (480px)
   ============================================================ */
@media (max-width: 480px) {
  .hero h1 { font-size: 1.65rem; }
  .section-title { font-size: 1.4rem; }
  .hero-ctas { flex-direction: column; width: 100%; }
  .hero-ctas .btn { width: 100%; }
  .subjects-strip { gap: 0.5rem; }
  .subject-tag { font-size: 0.8rem; padding: 0.4rem 1rem; }
}