/* =========================================
   CREALAB — CSS Principal
   ========================================= */

/* --- VARIABLES --- */
:root {
  --clr-primary: #7c3aed;
  --clr-primary-dark: #5b21b6;
  --clr-primary-light: #ede9fe;
  --clr-primary-lighter: #f5f3ff;
  --clr-accent: #ec4899;
  --clr-text: #1e1b4b;
  --clr-text-muted: #64748b;
  --clr-bg: #ffffff;
  --clr-surface: #f8fafc;
  --clr-border: #e2e8f0;
  --clr-star: #facc15;
  --clr-success: #16a34a;

  --font-sans: 'Plus Jakarta Sans', sans-serif;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 32px;

  --shadow-sm: 0 1px 3px rgba(0,0,0,.07), 0 1px 2px rgba(0,0,0,.06);
  --shadow-md: 0 4px 16px rgba(124,58,237,.10), 0 2px 6px rgba(0,0,0,.06);
  --shadow-lg: 0 10px 40px rgba(124,58,237,.15);

  --nav-h: 72px;
  --container: 1200px;
}

/* --- RESET --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  color: var(--clr-text);
  background: var(--clr-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { display: block; max-width: 100%; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
input, textarea { font-family: inherit; }

/* --- CONTAINER --- */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

/* =========================================
   BUTTONS
   ========================================= */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-md);
  font-size: .95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all .2s ease;
  white-space: nowrap;
  border: 2px solid transparent;
}
.btn--primary {
  background: var(--clr-primary);
  color: #fff;
  box-shadow: 0 4px 14px rgba(124,58,237,.35);
}
.btn--primary:hover {
  background: var(--clr-primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(124,58,237,.45);
}
.btn--outline {
  background: #fff;
  color: var(--clr-text);
  border-color: var(--clr-border);
}
.btn--outline:hover {
  border-color: var(--clr-primary);
  color: var(--clr-primary);
}
.btn--ghost {
  background: transparent;
  color: var(--clr-text);
  border-color: var(--clr-border);
}
.btn--ghost:hover {
  background: var(--clr-primary-lighter);
  color: var(--clr-primary);
  border-color: var(--clr-primary-light);
}
.btn--sm { padding: 10px 20px; font-size: .875rem; }
.btn--full { width: 100%; justify-content: center; }

/* =========================================
   NAVBAR
   ========================================= */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--clr-border);
  height: var(--nav-h);
}
.navbar__inner {
  display: flex;
  align-items: center;
  gap: 32px;
  height: 100%;
}
.navbar__logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--clr-primary), var(--clr-accent));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.logo-text {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--clr-text);
}
.logo-text span {
  color: var(--clr-primary);
}
.navbar__nav {
  display: flex;
  align-items: center;
  gap: 4px;
  margin: 0 auto;
}
.navbar__link {
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-size: .925rem;
  font-weight: 500;
  color: var(--clr-text-muted);
  transition: all .18s;
  position: relative;
}
.navbar__link:hover { color: var(--clr-primary); }
.navbar__link--active {
  color: var(--clr-primary);
  font-weight: 600;
}
.navbar__link--active::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 3px;
  background: var(--clr-primary);
  border-radius: 99px;
}
.navbar__auth {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.navbar__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  margin-left: auto;
}
.navbar__hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--clr-text);
  border-radius: 2px;
  transition: all .25s;
}
.navbar__hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.navbar__hamburger.open span:nth-child(2) { opacity: 0; }
.navbar__hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile nav */
.navbar__mobile {
  display: none;
  flex-direction: column;
  gap: 4px;
  padding: 16px 24px 20px;
  background: #fff;
  border-bottom: 1px solid var(--clr-border);
}
.navbar__mobile.open { display: flex; }
.navbar__mobile-link {
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  font-weight: 500;
  color: var(--clr-text-muted);
  transition: background .18s, color .18s;
}
.navbar__mobile-link:hover,
.navbar__mobile-link.active {
  background: var(--clr-primary-lighter);
  color: var(--clr-primary);
}
.navbar__mobile-auth {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--clr-border);
}

/* =========================================
   HERO
   ========================================= */
.hero {
  padding: 80px 0 60px;
  background: linear-gradient(160deg, #faf5ff 0%, #f0f9ff 100%);
  overflow: hidden;
}
.hero__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  min-height: 420px;
}
.hero__content { max-width: 540px; }
.hero__title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  line-height: 1.15;
  color: var(--clr-text);
  letter-spacing: -.02em;
  margin-bottom: 20px;
}
.hero__subtitle {
  font-size: 1.05rem;
  color: var(--clr-text-muted);
  line-height: 1.7;
  margin-bottom: 32px;
  max-width: 460px;
}
.hero__actions {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}
.hero__social-proof {
  display: flex;
  align-items: center;
  gap: 14px;
}
.avatars {
  display: flex;
}
.avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 2px solid #fff;
  margin-left: -10px;
  background: linear-gradient(135deg, var(--clr-primary), var(--clr-accent));
}
.avatar:first-child { margin-left: 0; }
.avatar--1 { background: linear-gradient(135deg, #a855f7, #7c3aed); }
.avatar--2 { background: linear-gradient(135deg, #ec4899, #f59e0b); }
.avatar--3 { background: linear-gradient(135deg, #0ea5e9, #16a34a); }
.hero__proof-text { display: flex; flex-direction: column; }
.hero__proof-text strong { font-size: .95rem; font-weight: 700; color: var(--clr-text); }
.hero__proof-text span { font-size: .85rem; color: var(--clr-text-muted); }

/* Hero image placeholder */
.hero__image-wrap {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 420px;
}
.hero__circle {
  position: absolute;
  width: 360px;
  height: 360px;
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(124,58,237,.12), rgba(236,72,153,.08));
  right: -20px;
  top: 50%;
  transform: translateY(-50%);
}
.hero__img-placeholder {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 300px;
  height: 300px;
  background: rgba(255,255,255,.7);
  border-radius: var(--radius-xl);
  border: 2px dashed var(--clr-primary-light);
  color: var(--clr-text-muted);
  font-size: .9rem;
  gap: 12px;
}
.hero__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius-xl);
  position: relative;
  z-index: 1;
}

/* =========================================
   FEATURES
   ========================================= */
.features {
  padding: 40px 0;
  background: var(--clr-bg);
}
.features__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--clr-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.feature-card {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 28px 24px;
  background: var(--clr-bg);
  transition: background .2s;
}
.feature-card:hover { background: var(--clr-primary-lighter); }
.feature-card__icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: var(--clr-primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.feature-card__title {
  font-size: .95rem;
  font-weight: 700;
  color: var(--clr-text);
  margin-bottom: 4px;
}
.feature-card__desc {
  font-size: .825rem;
  color: var(--clr-text-muted);
  line-height: 1.55;
}

/* =========================================
   SECTION TITLE
   ========================================= */
.section-title {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--clr-text);
  letter-spacing: -.01em;
}
.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--clr-primary);
  font-weight: 600;
  font-size: .9rem;
  transition: gap .2s;
}
.link-arrow:hover { gap: 10px; }

/* =========================================
   COURSES
   ========================================= */
.courses {
  padding: 60px 0 80px;
  background: var(--clr-surface);
}
.courses__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 32px;
  gap: 16px;
}
.courses__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.course-card {
  background: var(--clr-bg);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  transition: box-shadow .25s, transform .25s, border-color .25s;
  cursor: pointer;
}
.course-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
  border-color: var(--clr-primary-light);
}
.course-card__icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.course-card__body { flex: 1; }
.course-card__title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--clr-text);
  margin-bottom: 8px;
  line-height: 1.35;
}
.course-card__desc {
  font-size: .85rem;
  color: var(--clr-text-muted);
  line-height: 1.6;
}
.course-card__meta {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  font-size: .8rem;
  color: var(--clr-text-muted);
  border-top: 1px solid var(--clr-border);
  padding-top: 14px;
}
.course-card__hours,
.course-card__rating {
  display: flex;
  align-items: center;
  gap: 4px;
}
.course-card__level {
  padding: 2px 10px;
  background: var(--clr-primary-lighter);
  color: var(--clr-primary);
  border-radius: 99px;
  font-weight: 600;
  font-size: .75rem;
}

/* =========================================
   FOOTER
   ========================================= */
.footer {
  background: var(--clr-bg);
  border-top: 1px solid var(--clr-border);
  padding: 60px 0 0;
}
.footer__inner {
  display: grid;
  grid-template-columns: 240px 1fr 1fr 1fr 280px;
  gap: 40px;
  padding-bottom: 48px;
}
.footer__logo { margin-bottom: 14px; }
.footer__tagline {
  font-size: .875rem;
  color: var(--clr-text-muted);
  line-height: 1.65;
  margin-bottom: 20px;
  max-width: 200px;
}
.footer__social {
  display: flex;
  gap: 10px;
}
.footer__social-link {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--clr-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--clr-text-muted);
  transition: all .2s;
}
.footer__social-link:hover {
  border-color: var(--clr-primary);
  color: var(--clr-primary);
  background: var(--clr-primary-lighter);
}
.footer__col-title {
  font-size: .9rem;
  font-weight: 700;
  color: var(--clr-text);
  margin-bottom: 16px;
}
.footer__list { display: flex; flex-direction: column; gap: 10px; }
.footer__link {
  font-size: .875rem;
  color: var(--clr-text-muted);
  transition: color .18s;
}
.footer__link:hover { color: var(--clr-primary); }
.newsletter-form__group {
  display: flex;
  align-items: center;
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color .2s;
}
.newsletter-form__group:focus-within { border-color: var(--clr-primary); }
.newsletter-form__input {
  flex: 1;
  border: none;
  background: transparent;
  padding: 12px 16px;
  font-size: .875rem;
  color: var(--clr-text);
  outline: none;
}
.newsletter-form__input::placeholder { color: var(--clr-text-muted); }
.newsletter-form__btn {
  width: 44px;
  height: 44px;
  background: var(--clr-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  transition: background .2s;
}
.newsletter-form__btn:hover { background: var(--clr-primary-dark); }
.newsletter-form__note {
  margin-top: 10px;
  font-size: .8rem;
  color: var(--clr-text-muted);
}
.footer__bottom {
  border-top: 1px solid var(--clr-border);
  padding: 20px 0;
  text-align: center;
  font-size: .85rem;
  color: var(--clr-text-muted);
}

/* =========================================
   RESPONSIVE
   ========================================= */
@media (max-width: 1100px) {
  .courses__grid { grid-template-columns: repeat(2, 1fr); }
  .features__grid { grid-template-columns: repeat(2, 1fr); }
  .footer__inner { grid-template-columns: 1fr 1fr 1fr; }
  .footer__brand { grid-column: 1 / -1; }
  .footer__newsletter { grid-column: 1 / -1; }
}

@media (max-width: 900px) {
  .hero__inner { grid-template-columns: 1fr; }
  .hero__image-wrap { display: none; }
  .hero { padding: 60px 0 40px; }
  .navbar__nav,
  .navbar__auth { display: none; }
  .navbar__hamburger { display: flex; }
  .navbar__inner { gap: 16px; }
}

@media (max-width: 640px) {
  .courses__grid { grid-template-columns: 1fr; }
  .features__grid { grid-template-columns: 1fr; }
  .footer__inner { grid-template-columns: 1fr; }
  .footer__brand,
  .footer__newsletter { grid-column: auto; }
  .courses__header { flex-direction: column; align-items: flex-start; gap: 8px; }
  .hero__actions { flex-direction: column; align-items: flex-start; }
  .btn--primary, .btn--outline { width: 100%; justify-content: center; }
}