/* ============================================================
   TRÁFICO S.L. — Stylesheet
   Mobile-first, modern, clean design
   ============================================================ */

/* ---------- CSS Custom Properties ---------- */
:root {
  /* Brand colours */
  --clr-primary:      #1a56db;
  --clr-primary-dark: #1341b0;
  --clr-primary-light:#e8f0fe;
  --clr-accent:       #f97316;
  --clr-accent-dark:  #ea6c0a;

  /* Neutrals */
  --clr-white:   #ffffff;
  --clr-bg:      #f8fafc;
  --clr-surface: #ffffff;
  --clr-border:  #e2e8f0;
  --clr-text:    #1e293b;
  --clr-muted:   #64748b;
  --clr-dark:    #0f172a;

  /* Card accent colours */
  --clr-blue:   #1a56db;
  --clr-orange: #f97316;
  --clr-green:  #16a34a;
  --clr-red:    #dc2626;
  --clr-purple: #7c3aed;
  --clr-teal:   #0d9488;

  /* Typography */
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --text-xs:   0.75rem;
  --text-sm:   0.875rem;
  --text-base: 1rem;
  --text-lg:   1.125rem;
  --text-xl:   1.25rem;
  --text-2xl:  1.5rem;
  --text-3xl:  1.875rem;
  --text-4xl:  2.25rem;
  --text-5xl:  3rem;

  /* Spacing */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* Radius */
  --radius-sm: 0.375rem;
  --radius:    0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.06);
  --shadow:    0 4px 12px rgba(0,0,0,.10);
  --shadow-md: 0 8px 24px rgba(0,0,0,.12);
  --shadow-lg: 0 16px 48px rgba(0,0,0,.14);

  /* Transitions */
  --transition: 0.25s ease;
  --transition-fast: 0.15s ease;

  /* Layout */
  --max-width: 1200px;
  --header-h:  64px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

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

img { display: block; max-width: 100%; height: auto; }
a  { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
address { font-style: normal; }
input, select, textarea { font-family: inherit; }

/* ---------- Utility: Container ---------- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--space-4);
}

/* ============================================================
   HEADER / NAVBAR
   ============================================================ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-h);
  background: rgba(255,255,255,0.97);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--clr-border);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition);
}

.header.scrolled {
  box-shadow: var(--shadow);
}

.header__inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

/* Logo */
.header__logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-shrink: 0;
  text-decoration: none;
}

.logo__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--clr-primary);
  color: var(--clr-white);
  border-radius: var(--radius-sm);
  flex-shrink: 0;
  transition: background var(--transition);
}

.header__logo:hover .logo__icon { background: var(--clr-primary-dark); }

.logo__text {
  font-size: var(--text-xl);
  font-weight: 800;
  color: var(--clr-dark);
  letter-spacing: -0.02em;
}

.logo__text span { color: var(--clr-primary); }

/* Hamburger button */
.nav__toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: var(--space-2);
  border-radius: var(--radius-sm);
  transition: background var(--transition-fast);
  flex-shrink: 0;
}

.nav__toggle:hover { background: var(--clr-primary-light); }

.hamburger__bar {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--clr-dark);
  border-radius: var(--radius-full);
  transition: transform var(--transition), opacity var(--transition);
  transform-origin: center;
}

/* Hamburger → X animation */
.nav__toggle.is-open .hamburger__bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav__toggle.is-open .hamburger__bar:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}
.nav__toggle.is-open .hamburger__bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Navigation — mobile first (hidden by default) */
.nav {
  position: fixed;
  top: var(--header-h);
  left: 0;
  right: 0;
  background: var(--clr-white);
  border-bottom: 1px solid var(--clr-border);
  box-shadow: var(--shadow-md);
  padding: var(--space-4) var(--space-4) var(--space-6);
  transform: translateY(-110%);
  opacity: 0;
  visibility: hidden;
  transition: transform var(--transition), opacity var(--transition), visibility var(--transition);
  z-index: 999;
}

.nav.is-open {
  transform: translateY(0);
  opacity: 1;
  visibility: visible;
}

.nav__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.nav__link {
  display: block;
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-base);
  font-weight: 500;
  color: var(--clr-text);
  border-radius: var(--radius-sm);
  transition: background var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
  position: relative;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: 6px;
  left: var(--space-4);
  right: var(--space-4);
  height: 2px;
  background: var(--clr-primary);
  border-radius: var(--radius-full);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}

.nav__link:hover {
  background: var(--clr-primary-light);
  color: var(--clr-primary);
}

.nav__link:hover::after {
  transform: scaleX(1);
}

.nav__link--cta {
  background: var(--clr-primary);
  color: var(--clr-white) !important;
  text-align: center;
  margin-top: var(--space-2);
  border-radius: var(--radius-sm);
}

.nav__link--cta:hover {
  background: var(--clr-primary-dark) !important;
  color: var(--clr-white) !important;
}

.nav__link--cta::after { display: none; }

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-sm);
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: background var(--transition), color var(--transition), box-shadow var(--transition), transform var(--transition-fast);
  cursor: pointer;
  white-space: nowrap;
  text-decoration: none;
}

.btn:active { transform: scale(0.97); }

.btn--primary {
  background: var(--clr-primary);
  color: var(--clr-white);
  box-shadow: 0 2px 8px rgba(26,86,219,.30);
}

.btn--primary:hover {
  background: var(--clr-primary-dark);
  box-shadow: 0 4px 16px rgba(26,86,219,.40);
  transform: translateY(-1px);
}

.btn--outline {
  background: transparent;
  color: var(--clr-white);
  border: 2px solid rgba(255,255,255,0.7);
}

.btn--outline:hover {
  background: rgba(255,255,255,0.15);
  border-color: var(--clr-white);
}

.btn--sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-xs);
}

.btn--full { width: 100%; }

/* ============================================================
   HERO SLIDER
   ============================================================ */
.slider {
  position: relative;
  width: 100%;
  height: 100svh;
  min-height: 520px;
  max-height: 860px;
  overflow: hidden;
  margin-top: var(--header-h);
}

.slider__track {
  display: flex;
  width: 100%;
  height: 100%;
}

.slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 0.8s ease;
  pointer-events: none;
}

.slide--active {
  opacity: 1;
  pointer-events: auto;
}

.slide__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.slide__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to right,
    rgba(10,20,50,0.80) 0%,
    rgba(10,20,50,0.55) 60%,
    rgba(10,20,50,0.20) 100%
  );
  display: flex;
  align-items: center;
}

.slide__content {
  max-width: 640px;
  color: var(--clr-white);
  animation: slideIn 0.7s ease forwards;
}

@keyframes slideIn {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}

.slide__badge {
  display: inline-block;
  background: var(--clr-accent);
  color: var(--clr-white);
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-4);
}

.slide__title {
  font-size: clamp(1.75rem, 5vw, 3.5rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-4);
  text-shadow: 0 2px 12px rgba(0,0,0,.3);
}

.slide__desc {
  font-size: clamp(var(--text-sm), 2vw, var(--text-lg));
  color: rgba(255,255,255,0.88);
  margin-bottom: var(--space-8);
  max-width: 520px;
  line-height: 1.7;
}

.slide__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

/* Slider buttons */
.slider__btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 10;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  background: rgba(255,255,255,0.15);
  backdrop-filter: blur(8px);
  color: var(--clr-white);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition), transform var(--transition);
  border: 1px solid rgba(255,255,255,0.25);
}

.slider__btn:hover {
  background: rgba(255,255,255,0.30);
  transform: translateY(-50%) scale(1.08);
}

.slider__btn--prev { left: var(--space-4); }
.slider__btn--next { right: var(--space-4); }

/* Dots */
.slider__dots {
  position: absolute;
  bottom: var(--space-6);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: var(--space-2);
  z-index: 10;
}

.slider__dot {
  width: 8px;
  height: 8px;
  border-radius: var(--radius-full);
  background: rgba(255,255,255,0.45);
  border: none;
  cursor: pointer;
  transition: background var(--transition), width var(--transition);
}

.slider__dot.is-active {
  background: var(--clr-white);
  width: 24px;
}



/* ============================================================
   SECTIONS — General
   ============================================================ */
.section {
  padding: var(--space-16) 0;
}

.section--alt {
  background: var(--clr-bg);
}

.section:not(.section--alt) {
  background: var(--clr-white);
}

.section__header {
  text-align: center;
  max-width: 640px;
  margin-inline: auto;
  margin-bottom: var(--space-12);
}

.section__tag {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--clr-primary);
  background: var(--clr-primary-light);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-3);
}

.section__title {
  font-size: clamp(var(--text-2xl), 4vw, var(--text-4xl));
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--clr-dark);
  line-height: 1.2;
  margin-bottom: var(--space-4);
}

.section__title--left { text-align: left; }

.section__subtitle {
  font-size: var(--text-base);
  color: var(--clr-muted);
  line-height: 1.7;
}

/* ============================================================
   CARDS — Permisos
   ============================================================ */
.cards__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
}

.card {
  background: var(--clr-white);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  transition: box-shadow var(--transition), transform var(--transition);
}

.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.card__icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-4);
  flex-shrink: 0;
}

.card__icon--blue   { background: #e8f0fe; color: var(--clr-blue); }
.card__icon--orange { background: #fff3e8; color: var(--clr-orange); }
.card__icon--green  { background: #e8f5e9; color: var(--clr-green); }
.card__icon--red    { background: #fdecea; color: var(--clr-red); }
.card__icon--purple { background: #f3e8ff; color: var(--clr-purple); }
.card__icon--teal   { background: #e0f7f4; color: var(--clr-teal); }

.card__title {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--clr-dark);
  margin-bottom: var(--space-2);
}

.card__desc {
  font-size: var(--text-sm);
  color: var(--clr-muted);
  line-height: 1.65;
  margin-bottom: var(--space-4);
}

.card__link {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--clr-primary);
  transition: color var(--transition-fast), gap var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
}

.card__link:hover { color: var(--clr-primary-dark); }

/* ============================================================
   COURSE CARDS
   ============================================================ */
.courses__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
}

.course-card {
  background: var(--clr-white);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: box-shadow var(--transition), transform var(--transition);
}

.course-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.course-card__header {
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.course-card__header--cap    { background: linear-gradient(135deg, #1a56db, #3b82f6); }
.course-card__header--adr    { background: linear-gradient(135deg, #dc2626, #f87171); }
.course-card__header--moto   { background: linear-gradient(135deg, #7c3aed, #a78bfa); }
.course-card__header--puntos { background: linear-gradient(135deg, #f97316, #fb923c); }
.course-card__header--maquina{ background: linear-gradient(135deg, #16a34a, #4ade80); }
.course-card__header--otros  { background: linear-gradient(135deg, #0d9488, #2dd4bf); }

.course-card__label {
  font-size: var(--text-2xl);
  font-weight: 900;
  color: rgba(255,255,255,0.9);
  letter-spacing: -0.02em;
  text-shadow: 0 2px 8px rgba(0,0,0,.2);
}

.course-card__body {
  padding: var(--space-5);
}

.course-card__title {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--clr-dark);
  margin-bottom: var(--space-2);
}

.course-card__desc {
  font-size: var(--text-sm);
  color: var(--clr-muted);
  line-height: 1.65;
  margin-bottom: var(--space-4);
}

/* ============================================================
   ABOUT — La Autoescuela
   ============================================================ */
.about__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-10);
}

.about__text {
  font-size: var(--text-base);
  color: var(--clr-muted);
  line-height: 1.75;
  margin-bottom: var(--space-4);
}

.about__features {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-bottom: var(--space-8);
}

.about__feature {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-sm);
  color: var(--clr-text);
}

.feature__icon {
  width: 22px;
  height: 22px;
  border-radius: var(--radius-full);
  background: var(--clr-primary);
  color: var(--clr-white);
  font-size: var(--text-xs);
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

/* Info cards stack */
.about__card-stack {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.about__info-card {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  background: var(--clr-white);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), transform var(--transition);
}

.about__info-card:hover {
  box-shadow: var(--shadow);
  transform: translateX(4px);
}

.info-card__icon {
  font-size: 1.5rem;
  flex-shrink: 0;
  line-height: 1;
}

.about__info-card > div {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.about__info-card strong {
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--clr-dark);
}

.about__info-card span {
  font-size: var(--text-sm);
  color: var(--clr-muted);
  line-height: 1.5;
}

/* ============================================================
   INFORMACIÓN GRID
   ============================================================ */
.info__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

.info-item {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  background: var(--clr-white);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  text-decoration: none;
  transition: box-shadow var(--transition), transform var(--transition), border-color var(--transition);
}

.info-item:hover {
  box-shadow: var(--shadow);
  transform: translateY(-3px);
  border-color: var(--clr-primary);
}

.info-item__icon {
  font-size: 2rem;
  line-height: 1;
}

.info-item__title {
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--clr-dark);
}

.info-item__desc {
  font-size: var(--text-sm);
  color: var(--clr-muted);
  line-height: 1.65;
}

/* ============================================================
   NOTAS DE EXAMEN
   ============================================================ */
.notas__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-10);
  align-items: center;
}

.notas__text {
  font-size: var(--text-base);
  color: var(--clr-muted);
  line-height: 1.75;
  margin-bottom: var(--space-4);
}

.notas__links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-6);
}

.notas__links .btn--outline {
  color: var(--clr-primary);
  border-color: var(--clr-primary);
}

.notas__links .btn--outline:hover {
  background: var(--clr-primary-light);
}

.exam__card {
  background: var(--clr-primary);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  color: var(--clr-white);
  text-align: center;
}

.exam__icon {
  font-size: 3rem;
  margin-bottom: var(--space-4);
}

.exam__title {
  font-size: var(--text-2xl);
  font-weight: 800;
  margin-bottom: var(--space-3);
}

.exam__desc {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.80);
  line-height: 1.65;
  margin-bottom: var(--space-5);
}

.exam__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  text-align: left;
  max-width: 260px;
  margin-inline: auto;
}

.exam__list li {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.85);
  padding-left: var(--space-5);
  position: relative;
}

.exam__list li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--clr-accent);
  font-weight: 700;
}

/* ============================================================
   CALENDARIO CTA
   ============================================================ */
.calendar__cta {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--space-5);
  background: var(--clr-white);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-xl);
  padding: var(--space-10) var(--space-6);
  box-shadow: var(--shadow-sm);
}

.calendar__icon {
  font-size: 3.5rem;
  line-height: 1;
}

.calendar__text h3 {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--clr-dark);
  margin-bottom: var(--space-2);
}

.calendar__text p {
  font-size: var(--text-sm);
  color: var(--clr-muted);
  line-height: 1.65;
  max-width: 480px;
}



/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  background: var(--clr-dark);
  color: rgba(255,255,255,0.75);
}

.footer__top {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-10);
  padding-top: var(--space-16);
  padding-bottom: var(--space-12);
}

.footer__logo {
  margin-bottom: var(--space-4);
}

.footer__logo .logo__text { color: var(--clr-white); }
.footer__logo .logo__text span { color: var(--clr-accent); }

.footer__tagline {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.55);
  line-height: 1.65;
  max-width: 280px;
  margin-bottom: var(--space-5);
}

.footer__social {
  display: flex;
  gap: var(--space-3);
}

.social__link {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background: rgba(255,255,255,0.08);
  color: rgba(255,255,255,0.65);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition), color var(--transition);
}

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

.footer__heading {
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--clr-white);
  margin-bottom: var(--space-4);
}

.footer__heading--mt { margin-top: var(--space-8); }

.footer__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.footer__list a {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.60);
  transition: color var(--transition-fast);
}

.footer__list a:hover { color: var(--clr-white); }

.footer__address {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-bottom: var(--space-2);
}

.footer__address p {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.60);
  line-height: 1.55;
}

.footer__address a {
  color: rgba(255,255,255,0.60);
  transition: color var(--transition-fast);
}

.footer__address a:hover { color: var(--clr-white); }

.footer__bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: var(--space-5) 0;
}

.footer__bottom-inner {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  text-align: center;
}

.footer__copy {
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.40);
}

.footer__legal {
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.40);
}

.footer__legal a {
  color: rgba(255,255,255,0.50);
  transition: color var(--transition-fast);
}

.footer__legal a:hover { color: var(--clr-white); }


/* ============================================================
   NAV SOCIAL ICONS
   ============================================================ */
.nav__item--social {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding-left: var(--space-2);
  border-top: 1px solid var(--clr-border);
  margin-top: var(--space-2);
  padding-top: var(--space-3);
}

.nav__social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  color: var(--clr-muted);
  background: var(--clr-bg);
  border: 1px solid var(--clr-border);
  transition: background var(--transition), color var(--transition), border-color var(--transition);
  flex-shrink: 0;
}

.nav__social-link:hover {
  background: var(--clr-primary);
  color: var(--clr-white);
  border-color: var(--clr-primary);
}

/* ============================================================
   CALENDAR — Iframe embed responsive
   ============================================================ */
.calendar__cta {
  flex-direction: column !important;
  text-align: center !important;
}

.calendar__embed-wrapper {
  width: 100%;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
  border: 1px solid var(--clr-border);
  background: var(--clr-white);
  /* Responsive height via aspect ratio */
  position: relative;
  min-height: 400px;
}

.calendar__iframe {
  width: 100%;
  height: 500px;
  display: block;
}

/* Mobile: compact height */
@media (max-width: 639px) {
  .calendar__iframe {
    height: 380px;
  }
}

/* ============================================================
   HERO — Mobile: arrows don't overlap text
   ============================================================ */
@media (max-width: 639px) {
  .slider__btn {
    top: auto;
    bottom: var(--space-16);
    transform: none;
  }
  .slider__btn:hover {
    transform: scale(1.08);
  }
  .slider__btn--prev { left: var(--space-4); }
  .slider__btn--next { right: var(--space-4); }

  .slide__content {
    padding-bottom: 5rem;
  }
}

/* ============================================================
   RESPONSIVE — Tablet (≥ 640px)
   ============================================================ */
@media (min-width: 640px) {

  .container { padding-inline: var(--space-6); }

  .stats__grid { grid-template-columns: repeat(4, 1fr); }

  .cards__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .courses__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .info__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .calendar__cta {
    flex-direction: row;
    text-align: left;
  }

  .calendar__icon { font-size: 4rem; }

  .footer__top {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer__bottom-inner {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}

/* ============================================================
   RESPONSIVE — Desktop (≥ 1024px)
   ============================================================ */
@media (min-width: 1024px) {

  :root { --header-h: 72px; }

  .container { padding-inline: var(--space-8); }

  /* Navbar: horizontal */
  .nav__toggle { display: none; }

  .nav {
    position: static;
    transform: none;
    opacity: 1;
    visibility: visible;
    background: transparent;
    border: none;
    box-shadow: none;
    padding: 0;
  }

  .nav__list {
    flex-direction: row;
    align-items: center;
    gap: var(--space-1);
  }

  .nav__link {
    font-size: var(--text-sm);
    padding: var(--space-2) var(--space-3);
    white-space: nowrap;
  }

  .nav__link--cta {
    margin-top: 0;
    padding: var(--space-2) var(--space-5);
  }

  /* Cards */
  .cards__grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .courses__grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .info__grid {
    grid-template-columns: repeat(3, 1fr);
  }

  /* About */
  .about__grid {
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: var(--space-16);
  }

  /* Notas */
  .notas__grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-16);
  }

  /* Contact */
  .contact__grid {
    grid-template-columns: 1fr 1.4fr;
    gap: var(--space-16);
    align-items: start;
  }

  /* Footer */
  .footer__top {
    grid-template-columns: 2fr 1fr 1fr 1fr 1.5fr;
    gap: var(--space-8);
  }

  /* Slider buttons bigger */
  .slider__btn {
    width: 52px;
    height: 52px;
  }

  .slider__btn--prev { left: var(--space-8); }
  .slider__btn--next { right: var(--space-8); }

  /* Social icons in desktop nav */
  .nav__item--social {
    border-top: none;
    margin-top: 0;
    padding-top: 0;
    padding-left: var(--space-3);
    border-left: 1px solid var(--clr-border);
    margin-left: var(--space-1);
  }

  .nav__social-link {
    width: 32px;
    height: 32px;
  }

  /* Calendar iframe desktop */
  .calendar__iframe {
    height: 600px;
  }

}

/* ============================================================
   RESPONSIVE — Large Desktop (≥ 1280px)
   ============================================================ */
@media (min-width: 1280px) {
  .container { padding-inline: var(--space-10); }
}

/* ============================================================
   SCROLL ANIMATIONS — Intersection Observer
   ============================================================ */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

/* Stagger delay helpers */
.reveal--d1 { transition-delay: 0.05s; }
.reveal--d2 { transition-delay: 0.10s; }
.reveal--d3 { transition-delay: 0.15s; }
.reveal--d4 { transition-delay: 0.20s; }
.reveal--d5 { transition-delay: 0.25s; }
.reveal--d6 { transition-delay: 0.30s; }

/* ============================================================
   NAV ACTIVE LINK
   ============================================================ */
.nav__link--active {
  color: var(--clr-primary);
  background: var(--clr-primary-light);
}

@media (min-width: 1024px) {
  .nav__link--active {
    background: transparent;
  }
  .nav__link--active::after {
    transform: scaleX(1);
  }
}

/* ============================================================
   BACK TO TOP BUTTON
   ============================================================ */
.back-to-top {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  background: var(--clr-primary);
  color: var(--clr-white);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity var(--transition), visibility var(--transition), transform var(--transition), background var(--transition);
  z-index: 500;
  border: none;
  cursor: pointer;
}

.back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background: var(--clr-primary-dark);
  transform: translateY(-2px);
}

/* ============================================================
   ACCESSIBILITY — Focus styles
   ============================================================ */
:focus-visible {
  outline: 2px solid var(--clr-primary);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* ============================================================
   SCROLLBAR (Webkit)
   ============================================================ */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--clr-bg); }
::-webkit-scrollbar-thumb { background: var(--clr-border); border-radius: var(--radius-full); }
::-webkit-scrollbar-thumb:hover { background: var(--clr-muted); }