/* ========================================
   CBK Learning — Global Styles
   ======================================== */

:root {
  --color-bg: #faf9f7;
  --color-surface: #ffffff;
  --color-text: #1a1a1a;
  --color-text-muted: #6b6560;
  --color-border: rgba(0, 0, 0, 0.08);
  --color-accent-ai: #6c63ff;
  --color-accent-ai-light: #f0eeff;
  --color-accent-ai-glow: rgba(108, 99, 255, 0.12);
  --color-accent-learn: #e85d3a;
  --color-accent-learn-light: #fef0ec;
  --color-accent-learn-glow: rgba(232, 93, 58, 0.12);
  --font-heading: 'Space Grotesk', sans-serif;
  --font-body: 'Inter', sans-serif;
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
}

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

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

body {
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  line-height: 1.6;
  overflow-x: hidden;
  min-height: 100vh;
}

/* ========================================
   Navigation
   ======================================== */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 1.25rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: rgba(250, 249, 247, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border);
}

.nav__logo {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-text);
  text-decoration: none;
  letter-spacing: -0.02em;
  transition: opacity 0.3s ease;
}

.nav__logo:hover {
  opacity: 0.7;
}

.nav__hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  flex-direction: column;
  gap: 5px;
}

.nav__hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.nav__hamburger.is-open span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.nav__hamburger.is-open span:nth-child(2) {
  opacity: 0;
}

.nav__hamburger.is-open span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

.nav__links {
  display: flex;
  gap: 2rem;
  list-style: none;
  align-items: center;
}

.nav__links a {
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.3s ease;
}

.nav__links a:hover {
  color: var(--color-text);
}

.nav__cta {
  background: var(--color-text);
  color: var(--color-bg) !important;
  padding: 0.5rem 1.25rem;
  border-radius: 100px;
  font-weight: 600;
  font-size: 0.85rem !important;
  transition: transform 0.3s var(--ease-out-expo), opacity 0.3s ease !important;
}

.nav__cta:hover {
  transform: scale(1.05);
  opacity: 0.85;
}

/* ========================================
   Hero / Intro Section
   ======================================== */

.hero {
  min-height: 75vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 8rem 2rem 3rem;
  background: #ffffff;
}

.hero__gif-wrap {
  max-width: 720px;
  width: 100%;
  margin-bottom: 1.5rem;
}

.hero__gif {
  width: 100%;
  height: auto;
  display: block;
}

.hero__sub {
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  color: var(--color-text-muted);
  max-width: 540px;
  line-height: 1.8;
}

.hero__clients {
  margin-top: 3rem;
  padding-top: 2.5rem;
  border-top: 1px solid var(--color-border);
  text-align: center;
}

.hero__clients-label {
  font-size: 0.75rem;
  color: #aaa;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-weight: 500;
  margin-bottom: 1.5rem;
}

.hero__logos {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 1.75rem 2.5rem;
  max-width: 800px;
  margin: 0 auto;
}

.hero__logos img {
  height: 26px;
  width: auto;
  max-width: 120px;
  object-fit: contain;
  opacity: 0.3;
  filter: grayscale(1);
  transition: opacity 0.3s ease, filter 0.3s ease;
}

.hero__logos img:hover {
  opacity: 0.85;
  filter: grayscale(0);
}

/* ========================================
   Router Section — The Two Paths
   ======================================== */

.router {
  padding: 5rem 2rem 6rem;
  max-width: 1060px;
  margin: 0 auto;
}

.router__heading {
  text-align: center;
  font-family: var(--font-heading);
  font-size: 1rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: 3rem;
}

.router__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.75rem;
}

/* ---- Path Card ---- */

.path-card {
  position: relative;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 16px;
  padding: 2.5rem 2.25rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  cursor: pointer;
  text-decoration: none;
  color: var(--color-text);
  overflow: hidden;
  transition: transform 0.5s var(--ease-out-expo),
              border-color 0.4s ease,
              box-shadow 0.4s ease;
}

.path-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  border-radius: 16px 16px 0 0;
  opacity: 0;
  transition: opacity 0.4s ease;
}

.path-card:hover {
  transform: translateY(-3px);
}

/* AI card accent */
.path-card--ai:hover {
  border-color: var(--color-accent-ai);
  box-shadow: 0 4px 24px var(--color-accent-ai-glow),
              0 0 0 1px var(--color-accent-ai);
}
.path-card--ai::before {
  background: var(--color-accent-ai);
}
.path-card--ai:hover::before {
  opacity: 1;
}

/* Learning card accent */
.path-card--learn:hover {
  border-color: var(--color-accent-learn);
  box-shadow: 0 4px 24px var(--color-accent-learn-glow),
              0 0 0 1px var(--color-accent-learn);
}
.path-card--learn::before {
  background: var(--color-accent-learn);
}
.path-card--learn:hover::before {
  opacity: 1;
}

.path-card__icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.path-card--ai .path-card__icon {
  background: var(--color-accent-ai-light);
  color: var(--color-accent-ai);
}

.path-card--learn .path-card__icon {
  background: var(--color-accent-learn-light);
  color: var(--color-accent-learn);
}

/* ---- Icon animations ---- */

/* Compass: ring draws on, then needle slowly rotates */
.icon-compass__ring {
  stroke-dasharray: 63;
  stroke-dashoffset: 63;
  transition: stroke-dashoffset 1s var(--ease-out-expo);
}

.icon-compass__needle,
.icon-compass__needle-stroke {
  transform-origin: 12px 12px;
  transition: transform 0.8s var(--ease-out-expo);
}

.visible .icon-compass__ring,
.path-card:hover .icon-compass__ring {
  stroke-dashoffset: 0;
}

.path-card:hover .icon-compass__needle,
.path-card:hover .icon-compass__needle-stroke {
  transform: rotate(45deg);
}

/* Puzzle: draws on, then subtle wiggle on hover */
.icon-puzzle__piece1 {
  stroke-dasharray: 200;
  stroke-dashoffset: 200;
  transition: stroke-dashoffset 1.2s var(--ease-out-expo);
}

.visible .icon-puzzle__piece1 {
  stroke-dashoffset: 0;
}

.path-card:hover .icon-puzzle {
  animation: puzzle-settle 0.6s var(--ease-out-expo);
}

@keyframes puzzle-settle {
  0% { transform: translate(0, 0); }
  25% { transform: translate(2px, -2px); }
  50% { transform: translate(-1px, 1px); }
  75% { transform: translate(1px, 0); }
  100% { transform: translate(0, 0); }
}

.path-card__title {
  font-family: var(--font-heading);
  font-size: clamp(1.35rem, 2.5vw, 1.75rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.25;
}

.path-card__desc {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
}

.path-card__bullets {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.path-card__bullets li {
  color: var(--color-text-muted);
  font-size: 0.88rem;
  padding-left: 1.25rem;
  position: relative;
}

.path-card__bullets li::before {
  content: '→';
  position: absolute;
  left: 0;
  opacity: 0.4;
}

.path-card__cta {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 600;
  font-size: 0.95rem;
  margin-top: auto;
  padding-top: 0.75rem;
  transition: gap 0.3s var(--ease-out-expo);
}

.path-card:hover .path-card__cta {
  gap: 0.85rem;
}

.path-card--ai .path-card__cta {
  color: var(--color-accent-ai);
}

.path-card--learn .path-card__cta {
  color: var(--color-accent-learn);
}

/* ========================================
   About Teaser (Homepage)
   ======================================== */

.about-teaser {
  padding: 4rem 2rem 5rem;
}

.about-teaser__inner {
  max-width: 700px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 2.5rem;
}

.about-teaser__photo {
  width: 160px;
  height: 160px;
  border-radius: 50%;
  object-fit: cover;
  object-position: center top;
  flex-shrink: 0;
}

.about-teaser__title {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: 0.5rem;
}

.about-teaser__text {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
  margin-bottom: 0.75rem;
}

.about-teaser__link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--color-text);
  font-weight: 600;
  font-size: 0.9rem;
  text-decoration: none;
  transition: gap 0.3s var(--ease-out-expo), opacity 0.3s ease;
}

.about-teaser__link:hover {
  gap: 0.7rem;
  opacity: 0.7;
}

@media (max-width: 768px) {
  .about-teaser__inner {
    flex-direction: column;
    text-align: center;
  }

  .about-teaser__photo {
    width: 120px;
    height: 120px;
  }
}

/* ========================================
   Footer
   ======================================== */

.footer__signup {
  max-width: 400px;
  margin: 0 auto 1.5rem;
  text-align: center;
}

.footer__signup-label {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: 0.75rem;
}

.footer__signup-form {
  display: flex;
  gap: 0.5rem;
}

.footer__signup-input {
  flex: 1;
  padding: 0.6rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: 100px;
  font-family: var(--font-body);
  font-size: 0.85rem;
  background: var(--color-surface);
  color: var(--color-text);
  outline: none;
  transition: border-color 0.3s ease;
}

.footer__signup-input:focus {
  border-color: var(--color-text-muted);
}

.footer__signup-btn {
  padding: 0.6rem 1.25rem;
  border: none;
  border-radius: 100px;
  background: var(--color-text);
  color: var(--color-bg);
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.3s ease;
}

.footer__signup-btn:hover {
  opacity: 0.8;
}

.footer {
  padding: 3rem 2rem;
  text-align: center;
  border-top: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

.footer__links {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  margin-bottom: 1rem;
  list-style: none;
}

.footer__links a {
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color 0.3s ease;
}

.footer__links a:hover {
  color: var(--color-text);
}

/* ========================================
   Animations
   ======================================== */

.fade-up {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s var(--ease-out-expo),
              transform 0.7s var(--ease-out-expo);
}

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

/* stagger children */
.stagger > .fade-up:nth-child(1) { transition-delay: 0s; }
.stagger > .fade-up:nth-child(2) { transition-delay: 0.1s; }
.stagger > .fade-up:nth-child(3) { transition-delay: 0.2s; }

/* ========================================
   Responsive
   ======================================== */

@media (max-width: 768px) {
  .nav {
    padding: 1rem 1.25rem;
    flex-wrap: wrap;
  }

  .nav__hamburger {
    display: flex;
  }

  .nav__links {
    display: none;
    flex-direction: column;
    width: 100%;
    gap: 0;
    padding-top: 1rem;
    order: 3;
  }

  .nav__links.is-open {
    display: flex;
  }

  .nav__links li {
    width: 100%;
  }

  .nav__links a {
    display: block;
    padding: 0.75rem 0;
    border-top: 1px solid var(--color-border);
  }

  .nav__cta {
    margin-top: 0.5rem;
    text-align: center;
    display: block !important;
  }

  .hero {
    padding: 7rem 1.5rem 3rem;
    min-height: 55vh;
  }

  .hero__gif-wrap {
    max-width: 90%;
  }

  .router {
    padding: 3rem 1.25rem 4rem;
  }

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

  .path-card {
    padding: 2rem 1.75rem;
  }
}