/* ============================================================
   ANABATIC EDUCATION — styles.css
   ============================================================ */

/* ============================================================
   Custom Properties
   ============================================================ */
:root {
  /* Brand Colors */
  --color-navy:       #1B2A4A;
  --color-navy-dark:  #111D33;
  --color-cream:      #F5F0E8;
  --color-cream-dark: #EAE3D6;
  --color-white:      #FFFFFF;
  --color-text:       #1C1C1C;
  --color-text-muted: #575757;
  --color-border:     #D9D0C4;

  /* Typography */
  --font-serif: 'Playfair Display', Georgia, 'Times New Roman', serif;
  --font-sans:  'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  /* Type Scale */
  --text-sm:   0.9375rem;  /* 15px */
  --text-base: 1.0625rem;  /* 17px */
  --text-lg:   1.25rem;    /* 20px */
  --text-xl:   1.5rem;     /* 24px */
  --text-2xl:  2rem;       /* 32px */
  --text-3xl:  2.625rem;   /* 42px */
  --text-4xl:  3.5rem;     /* 56px */

  /* Line Heights */
  --lh-tight: 1.2;
  --lh-snug:  1.4;
  --lh-base:  1.7;
  --lh-loose: 1.85;

  /* Spacing (4px base) */
  --sp-1:  0.25rem;   /*  4px */
  --sp-2:  0.5rem;    /*  8px */
  --sp-3:  0.75rem;   /* 12px */
  --sp-4:  1rem;      /* 16px */
  --sp-5:  1.25rem;   /* 20px */
  --sp-6:  1.5rem;    /* 24px */
  --sp-8:  2rem;      /* 32px */
  --sp-10: 2.5rem;    /* 40px */
  --sp-12: 3rem;      /* 48px */
  --sp-16: 4rem;      /* 64px */
  --sp-20: 5rem;      /* 80px */
  --sp-24: 6rem;      /* 96px */
  --sp-32: 8rem;      /* 128px */

  /* Layout */
  --max-width:  1140px;
  --nav-height: 68px;
  --gutter:     1.5rem;
  --radius-sm:  3px;
  --radius-md:  6px;
}

/* ============================================================
   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-sans);
  font-size: var(--text-base);
  line-height: var(--lh-base);
  color: var(--color-text);
  background-color: var(--color-white);
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
}

/* ============================================================
   Layout Utilities
   ============================================================ */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

.section-heading {
  font-family: var(--font-serif);
  font-size: var(--text-3xl);
  font-weight: 700;
  color: var(--color-navy);
  text-align: center;
  line-height: var(--lh-tight);
  margin-bottom: var(--sp-4);
}

.section-heading::after {
  content: '';
  display: block;
  width: 44px;
  height: 2px;
  background-color: var(--color-navy);
  margin: var(--sp-5) auto var(--sp-12);
}

/* ============================================================
   Navigation
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 200;
  background-color: var(--color-navy);
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-height);
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

.nav-logo {
  font-family: var(--font-serif);
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-cream);
  letter-spacing: 0.01em;
  flex-shrink: 0;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--sp-6);
}

.nav-links a {
  font-size: var(--text-sm);
  font-weight: 500;
  color: rgba(245, 240, 232, 0.78);
  letter-spacing: 0.02em;
  transition: color 0.15s;
}

.nav-links a:hover,
.nav-links a[aria-current="page"] {
  color: var(--color-cream);
}

.nav-cta {
  padding: var(--sp-2) var(--sp-5);
  border: 1px solid rgba(245, 240, 232, 0.4);
  border-radius: var(--radius-sm);
  color: var(--color-cream);
  transition: background-color 0.15s, border-color 0.15s;
}

.nav-cta:hover {
  color: var(--color-cream);
  background-color: rgba(245, 240, 232, 0.1);
  border-color: rgba(245, 240, 232, 0.65);
}

/* Hamburger */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 22px;
  height: 16px;
  background: none;
  border: none;
  cursor: pointer;
  flex-shrink: 0;
  padding: 0;
}

.nav-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-cream);
  border-radius: 1px;
}

/* ============================================================
   Hero
   ============================================================ */
.hero {
  background-color: var(--color-navy);
  padding: var(--sp-32) 0 var(--sp-24);
  text-align: center;
}

.hero .container {
  max-width: 800px;
}

.hero h1 {
  font-family: var(--font-serif);
  font-size: var(--text-4xl);
  font-weight: 700;
  color: var(--color-cream);
  line-height: var(--lh-tight);
  letter-spacing: -0.01em;
  margin-bottom: var(--sp-6);
}

.hero-tagline {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: var(--text-xl);
  color: rgba(245, 240, 232, 0.72);
  line-height: var(--lh-base);
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

/* ============================================================
   Services
   ============================================================ */
.services {
  background-color: var(--color-cream);
  padding: var(--sp-24) 0;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-6);
}

.service-card {
  display: flex;
  flex-direction: column;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--sp-8);
  color: var(--color-text);
  transition: border-color 0.2s, box-shadow 0.2s;
}

.service-card:hover {
  border-color: var(--color-navy);
  box-shadow: 0 2px 18px rgba(27, 42, 74, 0.1);
}

.service-card h3 {
  font-family: var(--font-serif);
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--color-navy);
  line-height: var(--lh-snug);
  margin-bottom: var(--sp-4);
}

.service-card p {
  font-size: var(--text-sm);
  line-height: var(--lh-loose);
  color: var(--color-text-muted);
  flex-grow: 1;
  margin-bottom: var(--sp-6);
}

.card-link {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-navy);
  letter-spacing: 0.02em;
}

/* ============================================================
   Team
   ============================================================ */
.team {
  background-color: var(--color-white);
  padding: var(--sp-24) 0;
}

/* Lead member */
.team-lead {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: var(--sp-12);
  align-items: start;
  padding-bottom: var(--sp-16);
  margin-bottom: var(--sp-16);
  border-bottom: 1px solid var(--color-border);
}

.team-lead-image img {
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  object-position: top;
  border-radius: var(--radius-md);
}

.team-lead-bio h3 {
  font-family: var(--font-serif);
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-navy);
  line-height: var(--lh-tight);
  margin-bottom: var(--sp-5);
}

.team-lead-bio p {
  line-height: var(--lh-loose);
  color: var(--color-text);
}

/* Secondary team grid */
.team-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--sp-8);
}

.team-card {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: var(--sp-5);
  align-items: start;
}

.team-card img {
  width: 120px;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  object-position: top;
  border-radius: var(--radius-sm);
}

.team-card-body h4 {
  font-family: var(--font-serif);
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-navy);
  line-height: var(--lh-snug);
  margin-bottom: var(--sp-2);
}

.team-card-body p {
  font-size: var(--text-sm);
  line-height: var(--lh-loose);
  color: var(--color-text-muted);
}

.team-specialties {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-navy);
  margin-bottom: var(--sp-3);
}

/* ============================================================
   CTA
   ============================================================ */
.cta {
  background-color: var(--color-navy);
  padding: var(--sp-24) 0;
  text-align: center;
}

.cta h2 {
  font-family: var(--font-serif);
  font-size: var(--text-3xl);
  font-weight: 700;
  color: var(--color-cream);
  line-height: var(--lh-tight);
  margin-bottom: var(--sp-8);
}

.btn {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: var(--text-base);
  font-weight: 600;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background-color 0.15s;
}

.btn-primary {
  padding: var(--sp-4) var(--sp-8);
  background-color: var(--color-cream);
  color: var(--color-navy);
}

.btn-primary:hover {
  background-color: var(--color-white);
}

.cta-email {
  margin-top: var(--sp-6);
}

.cta-email a {
  font-size: var(--text-base);
  color: rgba(245, 240, 232, 0.6);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color 0.15s;
}

.cta-email a:hover {
  color: var(--color-cream);
}

/* ============================================================
   Footer
   ============================================================ */
.site-footer {
  background-color: var(--color-navy-dark);
  padding: var(--sp-8) 0;
  text-align: center;
}

.site-footer p {
  font-size: var(--text-sm);
  color: rgba(245, 240, 232, 0.42);
  line-height: var(--lh-loose);
}

/* ============================================================
   Sub-page Hero
   ============================================================ */
.hero--sub {
  padding: var(--sp-20) 0 var(--sp-16);
}

/* ============================================================
   Approach
   ============================================================ */
.approach {
  background-color: var(--color-cream);
  padding: var(--sp-24) 0;
}

.approach-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--sp-6);
}

.approach-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--sp-8);
}

.approach-num {
  display: block;
  font-family: var(--font-serif);
  font-size: 2.75rem;
  font-weight: 700;
  color: rgba(27, 42, 74, 0.14);
  line-height: 1;
  margin-bottom: var(--sp-4);
}

.approach-card h3 {
  font-family: var(--font-serif);
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-navy);
  line-height: var(--lh-snug);
  margin-bottom: var(--sp-3);
}

.approach-card p {
  font-size: var(--text-sm);
  line-height: var(--lh-loose);
  color: var(--color-text-muted);
}

/* ============================================================
   Testimonials
   ============================================================ */
.testimonials {
  background-color: var(--color-white);
  padding: var(--sp-24) 0;
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--sp-6);
}

.testimonial-card {
  display: flex;
  flex-direction: column;
  background-color: var(--color-cream);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--sp-6);
}

.testimonial-header {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  margin-bottom: var(--sp-5);
  padding-bottom: var(--sp-4);
  border-bottom: 1px solid var(--color-border);
}

.testimonial-logo {
  height: 30px;
  width: auto;
  max-width: 68px;
  object-fit: contain;
  flex-shrink: 0;
}

.testimonial-school {
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-navy);
  line-height: var(--lh-snug);
}

.testimonial-text {
  font-size: var(--text-sm);
  line-height: var(--lh-loose);
  color: var(--color-text);
  font-style: italic;
  flex-grow: 1;
  margin-bottom: var(--sp-4);
}

.testimonial-source {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text-muted);
}

/* ============================================================
   Carousel
   ============================================================ */
.carousel-wrapper {
  position: relative;
}

.carousel-controls {
  display: none; /* visible only in carousel mode via media query */
  align-items: center;
  justify-content: center;
  gap: var(--sp-5);
  margin-top: var(--sp-6);
}

.carousel-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  background: var(--color-white);
  color: var(--color-navy);
  font-size: var(--text-lg);
  line-height: 1;
  cursor: pointer;
  flex-shrink: 0;
  transition: background-color 0.15s, border-color 0.15s, color 0.15s;
}

.carousel-btn:hover:not(:disabled) {
  background-color: var(--color-navy);
  color: var(--color-cream);
  border-color: var(--color-navy);
}

.carousel-btn:disabled {
  opacity: 0.3;
  cursor: default;
}

.carousel-dots {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
}

.carousel-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  border: none;
  padding: 0;
  background-color: var(--color-border);
  cursor: pointer;
  transition: background-color 0.15s, transform 0.15s;
}

.carousel-dot.is-active {
  background-color: var(--color-navy);
  transform: scale(1.35);
}

/* ============================================================
   Graduate — Approach (text layout)
   ============================================================ */
.approach-body {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-12);
  margin-bottom: var(--sp-12);
}

.approach-col > p {
  font-size: var(--text-base);
  line-height: var(--lh-loose);
  color: var(--color-text);
}

.approach-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
  margin-top: var(--sp-4);
}

.approach-list li {
  font-size: var(--text-base);
  color: var(--color-text);
  padding-left: var(--sp-5);
  position: relative;
  line-height: var(--lh-snug);
}

.approach-list li::before {
  content: '\2014'; /* em dash */
  position: absolute;
  left: 0;
  color: var(--color-navy);
  font-weight: 600;
}

/* ============================================================
   Video Embed
   ============================================================ */
.approach-video {
  margin-top: var(--sp-4);
}

.approach-video-label {
  font-size: var(--text-base);
  color: var(--color-text);
  line-height: var(--lh-base);
  margin-bottom: var(--sp-5);
}

.video-wrapper {
  position: relative;
  padding-bottom: 56.25%; /* 16:9 */
  height: 0;
  overflow: hidden;
  border-radius: var(--radius-md);
  background-color: var(--color-navy-dark);
}

.video-wrapper iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

/* ============================================================
   Course Callout
   ============================================================ */
.course-section {
  background-color: var(--color-white);
  padding: var(--sp-16) 0;
}

.course-callout {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-8);
  background-color: var(--color-cream);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--sp-8) var(--sp-10);
  max-width: 800px;
  margin: 0 auto;
}

.course-callout-text h3 {
  font-family: var(--font-serif);
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--color-navy);
  margin-bottom: var(--sp-2);
}

.course-callout-text p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: var(--lh-base);
}

.btn-navy {
  display: inline-block;
  padding: var(--sp-4) var(--sp-6);
  background-color: var(--color-navy);
  color: var(--color-cream);
  border-radius: var(--radius-sm);
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: 600;
  white-space: nowrap;
  flex-shrink: 0;
  transition: background-color 0.15s;
}

.btn-navy:hover {
  background-color: var(--color-navy-dark);
}

/* ============================================================
   Case Studies
   ============================================================ */
.case-studies {
  background-color: var(--color-cream);
  padding: var(--sp-24) 0;
}

.case-studies-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--sp-6);
}

.case-study-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.case-study-card img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  display: block;
}

.case-study-card-body {
  padding: var(--sp-8);
  flex: 1;
}

.case-study-card-body h3 {
  font-family: var(--font-serif);
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--color-navy);
  line-height: var(--lh-snug);
  margin-bottom: var(--sp-4);
}

.case-study-card-body p {
  font-size: var(--text-sm);
  line-height: var(--lh-loose);
  color: var(--color-text-muted);
}

/* ============================================================
   Responsive — Tablet (≤ 900px)
   ============================================================ */
@media (max-width: 900px) {
  :root {
    --text-4xl: 2.75rem;
    --text-3xl: 2.125rem;
  }

  .services-grid {
    grid-template-columns: 1fr;
    max-width: 560px;
    margin-left: auto;
    margin-right: auto;
  }

  .team-lead {
    grid-template-columns: 220px 1fr;
    gap: var(--sp-8);
  }

  /* Carousel mode: switch testimonials from grid to flex track */
  .carousel-wrapper {
    overflow: hidden;
  }

  .testimonials-grid {
    display: flex;
    gap: 0;
    transition: transform 0.35s ease;
    will-change: transform;
  }

  .testimonial-card {
    flex: 0 0 100%;
    min-width: 100%;
  }

  .carousel-controls {
    display: flex;
  }
}

/* ============================================================
   Responsive — Mobile (≤ 640px)
   ============================================================ */
@media (max-width: 640px) {
  :root {
    --text-4xl: 2.25rem;
    --text-3xl: 1.875rem;
    --text-2xl: 1.5rem;
    --gutter:   1.25rem;
  }

  /* Nav: show hamburger */
  .nav-toggle {
    display: flex;
  }

  .nav-links {
    display: none;
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    z-index: 199;
    flex-direction: column;
    align-items: flex-start;
    background-color: var(--color-navy);
    padding: var(--sp-4) var(--gutter) var(--sp-6);
    gap: var(--sp-4);
    border-top: 1px solid rgba(255, 255, 255, 0.07);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
  }

  .nav-links.is-open {
    display: flex;
  }

  .nav-links a {
    font-size: var(--text-base);
  }

  /* Remove border/padding from mobile CTA link */
  .nav-cta {
    border: none;
    padding: 0;
  }

  /* Hero */
  .hero {
    padding: var(--sp-20) 0 var(--sp-16);
  }

  /* Services */
  .services {
    padding: var(--sp-16) 0;
  }

  .services-grid {
    max-width: none;
  }

  /* Team */
  .team {
    padding: var(--sp-16) 0;
  }

  .team-lead {
    grid-template-columns: 1fr;
    gap: var(--sp-6);
  }

  .team-lead-image img {
    max-width: 200px;
  }

  .team-grid {
    grid-template-columns: 1fr;
  }

  .approach-grid {
    grid-template-columns: 1fr;
  }

  .approach-body {
    grid-template-columns: 1fr;
  }

  .course-callout {
    flex-direction: column;
    text-align: center;
    padding: var(--sp-8);
  }

  .team-card {
    grid-template-columns: 100px 1fr;
    gap: var(--sp-4);
  }

  .team-card img {
    width: 100px;
  }

  .case-studies-grid {
    grid-template-columns: 1fr;
  }

  /* CTA */
  .cta {
    padding: var(--sp-16) 0;
  }

  .btn-primary {
    width: 100%;
    max-width: 360px;
  }
}