/* ============================================
   Koula Education Consulting
   Design: Myhra-inspired — earthy sage, serif,
   generous whitespace, thin dividers
   ============================================ */

/* --- Custom Properties --- */
:root {
  --color-sage: #7B8E6B;
  --color-sage-dark: #5A6B4D;
  --color-sage-light: #E8EDE3;
  --color-cream: #FAF8F5;
  --color-warm-white: #FEFDFB;
  --color-text: #2E2E2E;
  --color-text-light: #5C5C5C;
  --color-border: #D6D0C8;
  --color-accent: #B8A68E;

  --font-serif: 'Cormorant Garamond', Georgia, 'Times New Roman', serif;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 4rem;
  --space-xl: 6rem;
  --space-2xl: 8rem;

  --max-width: 1100px;
  --nav-height: 72px;
}

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

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

body {
  font-family: var(--font-sans);
  font-weight: 300;
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-warm-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

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

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: rgba(254, 253, 251, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  z-index: 100;
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.nav.scrolled {
  border-bottom-color: var(--color-border);
  box-shadow: 0 1px 8px rgba(0, 0, 0, 0.04);
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--color-text);
  transition: color 0.3s ease;
}

.nav-logo:hover {
  color: var(--color-sage-dark);
}

.nav-links {
  display: flex;
  gap: 2rem;
}

.nav-link {
  font-family: var(--font-sans);
  font-size: 0.8rem;
  font-weight: 400;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-light);
  transition: color 0.3s ease;
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--color-sage-dark);
}

/* Mobile menu button */
.nav-menu-btn {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px;
  height: 32px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-menu-btn span {
  display: block;
  width: 100%;
  height: 1.5px;
  background: var(--color-text);
  transition: transform 0.3s ease, opacity 0.3s ease;
}

/* --- Buttons --- */
.btn {
  display: inline-block;
  font-family: var(--font-sans);
  font-weight: 400;
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.75rem 1.75rem;
  border: 1px solid var(--color-sage);
  color: var(--color-sage-dark);
  background: transparent;
  cursor: pointer;
  transition: background 0.3s ease, color 0.3s ease;
}

.btn:hover,
.btn:focus-visible {
  background: var(--color-sage);
  color: #fff;
}

.btn-nav {
  font-size: 0.75rem;
  padding: 0.6rem 1.4rem;
}

.btn-hero {
  font-size: 0.9rem;
  padding: 1rem 2.25rem;
  border-color: #fff;
  color: #fff;
}

.btn-hero:hover,
.btn-hero:focus-visible {
  background: #fff;
  color: var(--color-text);
}

.btn-contact {
  margin-top: 0;
}

.btn-wyzant {
  margin-top: 0;
  border-color: var(--color-accent);
  color: var(--color-text);
}

.btn-wyzant:hover,
.btn-wyzant:focus-visible {
  background: var(--color-accent);
  color: #fff;
}

/* --- Hero --- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: var(--color-sage-dark) url('https://images.pexels.com/photos/7972518/pexels-photo-7972518.jpeg?auto=compress&cs=tinysrgb&w=1920&h=1080&fit=crop') center/cover no-repeat;
  color: #fff;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    rgba(42, 48, 38, 0.55) 0%,
    rgba(42, 48, 38, 0.65) 100%
  );
}

.hero-content {
  position: relative;
  z-index: 1;
  padding: var(--space-lg) var(--space-md);
  max-width: 750px;
}

.hero-eyebrow {
  font-family: var(--font-sans);
  font-size: 0.8rem;
  font-weight: 400;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-bottom: var(--space-md);
  opacity: 0.9;
}

.hero-title {
  font-family: var(--font-serif);
  font-size: clamp(2.5rem, 6vw, 4.25rem);
  font-weight: 400;
  line-height: 1.25;
  letter-spacing: 0.01em;
  margin-bottom: var(--space-lg);
}

/* --- Sections --- */
.section {
  padding: var(--space-2xl) 0;
}

.section-title {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 400;
  text-align: center;
  letter-spacing: 0.01em;
  margin-bottom: var(--space-sm);
}

.divider {
  width: 80px;
  height: 1px;
  background: var(--color-accent);
  margin: 0 auto var(--space-lg);
}

/* --- Services --- */
.services {
  background: var(--color-cream);
}

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

.service-card {
  padding: var(--space-md);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.service-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
}

.service-icon {
  color: var(--color-sage);
  margin-bottom: var(--space-sm);
}

.service-card h3 {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  font-weight: 500;
  margin-bottom: 0.75rem;
}

.service-card p {
  color: var(--color-text-light);
  font-size: 0.95rem;
  line-height: 1.75;
}

/* --- About --- */
.about {
  background: var(--color-warm-white);
}

.about-content {
  max-width: 740px;
  margin: 0 auto;
}

.about-greeting {
  font-family: var(--font-serif);
  font-size: 1.6rem;
  font-weight: 500;
  font-style: italic;
  margin-bottom: var(--space-sm);
  color: var(--color-sage-dark);
}

.about-text p {
  margin-bottom: 1.25rem;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--color-text-light);
}

.about-text p:last-child {
  margin-bottom: 0;
}

.about-text strong {
  font-weight: 500;
  color: var(--color-text);
}

/* --- Testimonials --- */
.testimonials {
  background: var(--color-sage-light);
}

.carousel {
  max-width: 700px;
  margin: 0 auto;
  text-align: center;
}

.carousel-track {
  position: relative;
  min-height: 200px;
}

.testimonial {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.5s ease, transform 0.5s ease;
  pointer-events: none;
  border: none;
  margin: 0;
  padding: 0;
}

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

.testimonial p {
  font-family: var(--font-serif);
  font-size: clamp(1.15rem, 2.5vw, 1.4rem);
  font-weight: 400;
  font-style: italic;
  line-height: 1.7;
  color: var(--color-text);
  margin-bottom: var(--space-sm);
}

.testimonial cite {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-style: normal;
  font-weight: 400;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-text-light);
}

.carousel-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  margin-top: var(--space-md);
}

.carousel-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--color-border);
  border-radius: 50%;
  background: transparent;
  color: var(--color-text-light);
  cursor: pointer;
  transition: border-color 0.3s ease, color 0.3s ease;
}

.carousel-btn:hover,
.carousel-btn:focus-visible {
  border-color: var(--color-sage);
  color: var(--color-sage-dark);
}

.carousel-dots {
  display: flex;
  gap: 8px;
}

.carousel-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: 1px solid var(--color-sage);
  background: transparent;
  cursor: pointer;
  padding: 0;
  position: relative;
  transition: background 0.3s ease;
}

/* Larger tap target via pseudo-element */
.carousel-dot::before {
  content: '';
  position: absolute;
  inset: -12px;
}

.carousel-dot:focus-visible {
  outline-offset: 4px;
}

.carousel-dot.active,
.carousel-dot:hover {
  background: var(--color-sage);
}

/* --- Contact --- */
.contact {
  background: var(--color-warm-white);
}

.contact-content {
  text-align: center;
  max-width: 550px;
  margin: 0 auto;
}

.contact-intro {
  font-size: 1.05rem;
  color: var(--color-text-light);
  margin-bottom: var(--space-md);
}

.contact-details {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
}

.contact-item {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 1rem;
  color: var(--color-text-light);
  padding: 0.5rem 0.75rem;
  transition: color 0.3s ease;
}

.contact-item:hover,
.contact-item:focus-visible {
  color: var(--color-sage-dark);
}

.contact-item svg {
  flex-shrink: 0;
  color: var(--color-sage);
}

.contact-buttons {
  display: flex;
  justify-content: center;
  gap: var(--space-sm);
  margin-top: var(--space-md);
  flex-wrap: wrap;
}

/* --- Footer --- */
.footer {
  padding: var(--space-lg) 0;
  border-top: 1px solid var(--color-border);
  text-align: center;
}

.footer p {
  font-size: 0.8rem;
  color: var(--color-text-light);
  letter-spacing: 0.03em;
}

/* --- Focus Styles --- */
:focus-visible {
  outline: 2px solid var(--color-sage);
  outline-offset: 3px;
}

/* --- Animations (on scroll) --- */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

/* --- Responsive --- */
@media (max-width: 768px) {
  :root {
    --space-lg: 3rem;
    --space-xl: 4.5rem;
    --space-2xl: 5.5rem;
  }

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

  .service-card {
    padding: var(--space-sm);
  }

  .hero-eyebrow {
    font-size: 0.7rem;
    letter-spacing: 0.15em;
  }

  .nav-logo {
    font-size: 1.1rem;
  }

  .carousel-track {
    min-height: 260px;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    flex-direction: column;
    background: rgba(254, 253, 251, 0.98);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: var(--space-sm) var(--space-md);
    gap: 0;
    border-bottom: 1px solid var(--color-border);
  }

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

  .nav-links .nav-link {
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--color-sage-light);
  }

  .nav-links .nav-link:last-child {
    border-bottom: none;
  }

  .nav-menu-btn {
    display: flex;
  }

  .btn-nav {
    display: none;
  }
}

@media (max-width: 480px) {
  :root {
    --space-2xl: 4rem;
    --nav-height: 60px;
  }

  .btn-hero {
    padding: 0.85rem 1.75rem;
    font-size: 0.8rem;
  }

  .carousel-track {
    min-height: 300px;
  }
}

@media (max-width: 360px) {
  .hero-eyebrow {
    font-size: 0.6rem;
    letter-spacing: 0.1em;
  }

  .nav-logo {
    font-size: 0.95rem;
  }

  .carousel-track {
    min-height: 340px;
  }
}

/* --- Reduced motion --- */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .fade-in,
  .testimonial,
  .btn,
  .nav,
  .service-card,
  .contact-item,
  .carousel-btn,
  .carousel-dot,
  .nav-logo,
  .nav-link {
    transition: none;
  }

  .fade-in {
    opacity: 1;
    transform: none;
  }
}

/* --- Dark Mode (system preference) --- */
@media (prefers-color-scheme: dark) {
  :root {
    --color-sage: #94A886;
    --color-sage-dark: #B5C9A8;
    --color-sage-light: #232820;
    --color-cream: #1E2019;
    --color-warm-white: #191B16;
    --color-text: #F0EDE8;
    --color-text-light: #B5AFA6;
    --color-border: #343230;
    --color-accent: #D4C4A8;
  }

  body {
    -webkit-font-smoothing: auto;
  }

  .nav {
    background: rgba(25, 27, 22, 0.92);
  }

  .nav.scrolled {
    box-shadow: 0 1px 12px rgba(0, 0, 0, 0.3);
  }

  .nav-logo {
    color: var(--color-text);
  }

  .nav-logo:hover {
    color: var(--color-sage);
  }

  .nav-menu-btn span {
    background: var(--color-text);
  }

  .hero-overlay {
    background: linear-gradient(
      to bottom,
      rgba(15, 17, 13, 0.55) 0%,
      rgba(15, 17, 13, 0.7) 100%
    );
  }

  .btn {
    border-color: var(--color-sage);
    color: var(--color-sage);
  }

  .btn:hover,
  .btn:focus-visible {
    background: var(--color-sage);
    color: var(--color-warm-white);
  }

  .btn-hero {
    border-color: rgba(255, 255, 255, 0.7);
    color: #fff;
  }

  .btn-hero:hover,
  .btn-hero:focus-visible {
    background: rgba(255, 255, 255, 0.9);
    color: #1E2019;
  }

  .btn-wyzant {
    border-color: var(--color-accent);
    color: var(--color-accent);
  }

  .btn-wyzant:hover,
  .btn-wyzant:focus-visible {
    background: var(--color-accent);
    color: var(--color-warm-white);
  }

  .service-card:hover {
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.25);
  }

  .service-icon {
    color: var(--color-sage);
  }

  .about-greeting {
    color: var(--color-sage);
  }

  .about-text strong {
    color: var(--color-text);
  }

  .testimonials {
    background: #1F231C;
  }

  .carousel-btn {
    border-color: var(--color-border);
    color: var(--color-text-light);
  }

  .carousel-btn:hover,
  .carousel-btn:focus-visible {
    border-color: var(--color-sage);
    color: var(--color-sage);
  }

  .carousel-dot {
    border-color: rgba(148, 168, 134, 0.5);
  }

  .carousel-dot.active,
  .carousel-dot:hover {
    background: var(--color-sage);
  }

  .contact-item svg {
    color: var(--color-sage);
  }

  .footer {
    border-top-color: var(--color-border);
  }

  :focus-visible {
    outline-color: var(--color-sage);
  }

  /* Dark mobile menu */
  @media (max-width: 768px) {
    .nav-links {
      background: rgba(25, 27, 22, 0.98);
      border-bottom-color: var(--color-border);
    }

    .nav-links .nav-link {
      border-bottom-color: var(--color-border);
    }
  }
}

/* --- No-JS fallback --- */
.no-js .fade-in {
  opacity: 1;
  transform: none;
}

.no-js .testimonial {
  position: static;
  opacity: 1;
  transform: none;
  pointer-events: auto;
  margin-bottom: var(--space-md);
}

.no-js .carousel-controls {
  display: none;
}