/* ================================================================
   ESMUSE — main.css
   Sistema de diseño: variables, reset, tipografía, header, footer
   ================================================================ */

/* ── 1. CUSTOM PROPERTIES ──────────────────────────────────────── */
:root {
  /* Colores */
  --color-bg:            #FAF9F6;
  --color-bg-2:          #F2EDE5;
  --color-bg-dark:       #1A1825;
  --color-bg-dark-2:     #231F30;

  --color-primary:       #7B1D3C;
  --color-primary-h:     #9B2249;
  --color-primary-light: #F9EDF1;

  --color-gold:          #C4820A;
  --color-gold-h:        #E09B0C;
  --color-gold-light:    #FDF5E4;

  --color-text:          #1A1825;
  --color-text-muted:    #68635E;
  --color-text-light:    #9A9590;
  --color-text-inv:      #FAF9F6;

  --color-border:        #E8E2D9;
  --color-border-dark:   #CEC7BB;
  --color-white:         #FFFFFF;

  --color-success:       #166534;
  --color-success-bg:    #DCFCE7;
  --color-warning:       #92400E;
  --color-warning-bg:    #FEF3C7;
  --color-danger:        #991B1B;
  --color-danger-bg:     #FEE2E2;

  /* Tipografía */
  --font-display: 'Cormorant Garamond', Georgia, 'Times New Roman', serif;
  --font-body:    'Inter', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;

  /* Tamaños texto */
  --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;
  --text-6xl:  3.75rem;
  --text-7xl:  4.5rem;

  /* Espaciado */
  --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;
  --space-32: 8rem;

  /* Layout */
  --container-max: 1200px;
  --container-pad: clamp(1rem, 5vw, 2rem);

  /* Bordes */
  --radius-sm:   4px;
  --radius-md:   8px;
  --radius-lg:   12px;
  --radius-xl:   20px;
  --radius-2xl:  28px;
  --radius-full: 9999px;

  /* Sombras */
  --shadow-sm: 0 1px 3px rgba(26,24,37,.07), 0 1px 2px rgba(26,24,37,.05);
  --shadow-md: 0 4px 16px rgba(26,24,37,.09), 0 2px 6px rgba(26,24,37,.05);
  --shadow-lg: 0 10px 32px rgba(26,24,37,.12), 0 4px 10px rgba(26,24,37,.06);
  --shadow-xl: 0 20px 48px rgba(26,24,37,.15), 0 8px 16px rgba(26,24,37,.08);

  /* Transiciones */
  --ease:        cubic-bezier(0.4, 0, 0.2, 1);
  --ease-out:    cubic-bezier(0, 0, 0.2, 1);
  --duration:    200ms;
  --duration-lg: 380ms;

  /* Header */
  --header-h: 72px;
}

/* ── 2. RESET ───────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  scroll-padding-top: var(--header-h);
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.65;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

/* ── 3. TIPOGRAFÍA ──────────────────────────────────────────────── */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.18;
  letter-spacing: -0.01em;
  color: var(--color-text);
}

h1 { font-size: clamp(2.4rem, 5.5vw, var(--text-7xl)); }
h2 { font-size: clamp(2rem, 4vw, var(--text-5xl)); }
h3 { font-size: clamp(1.6rem, 3vw, var(--text-4xl)); }
h4 { font-size: var(--text-2xl); }
h5 { font-size: var(--text-xl); }
h6 { font-size: var(--text-lg); }

p { max-width: 65ch; }
strong { font-weight: 600; }
em { font-style: italic; }

/* Skip link */
.skip-link {
  position: absolute;
  top: -100px;
  left: var(--space-4);
  z-index: 200;
  padding: var(--space-3) var(--space-6);
  background: var(--color-primary);
  color: var(--color-white);
  border-radius: var(--radius-md);
  font-weight: 600;
  transition: top var(--duration) var(--ease);
}
.skip-link:focus { top: var(--space-4); }

/* Focus visible */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* ── 4. LAYOUT UTILITIES ────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

.section {
  padding-block: clamp(var(--space-16), 9vw, var(--space-32));
}

.section--alt  { background-color: var(--color-bg-2); }
.section--dark { background-color: var(--color-bg-dark); color: var(--color-text-inv); }

.section-label {
  display: block;
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-gold);
  margin-bottom: var(--space-3);
}

.section-title  { margin-bottom: var(--space-4); }
.section-footer { margin-top: var(--space-12); display: flex; justify-content: center; }

.section-header { margin-bottom: var(--space-12); }

.section-header--center { text-align: center; }
.section-header--center .section-desc { margin-inline: auto; }

.section-header--between {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--space-6);
}

.section-desc {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  margin-top: var(--space-4);
  max-width: 55ch;
}

/* ── 5. BOTONES ─────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-full);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.02em;
  white-space: nowrap;
  transition:
    background-color var(--duration) var(--ease),
    color var(--duration) var(--ease),
    border-color var(--duration) var(--ease),
    box-shadow var(--duration) var(--ease),
    transform var(--duration) var(--ease);
}
.btn:hover  { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }

.btn-primary {
  background: var(--color-primary);
  color: var(--color-white);
  box-shadow: 0 2px 10px rgba(123,29,60,.28);
}
.btn-primary:hover {
  background: var(--color-primary-h);
  box-shadow: 0 6px 20px rgba(123,29,60,.35);
}

.btn-gold {
  background: var(--color-gold);
  color: var(--color-white);
  box-shadow: 0 2px 10px rgba(196,130,10,.28);
}
.btn-gold:hover {
  background: var(--color-gold-h);
  box-shadow: 0 6px 20px rgba(196,130,10,.35);
}

.btn-outline {
  background: transparent;
  color: var(--color-text);
  border: 2px solid var(--color-border-dark);
}
.btn-outline:hover { border-color: var(--color-primary); color: var(--color-primary); }

.btn-outline-inv {
  background: transparent;
  color: var(--color-white);
  border: 2px solid rgba(255,255,255,.55);
}
.btn-outline-inv:hover { border-color: var(--color-white); background: rgba(255,255,255,.12); }

.btn-ghost {
  background: transparent;
  color: var(--color-primary);
  padding-inline: 0;
  border-radius: 0;
  font-size: var(--text-sm);
}
.btn-ghost:hover { transform: none; text-decoration: underline; text-underline-offset: 3px; }

.btn-whatsapp { background: #25D366; color: var(--color-white); }
.btn-whatsapp:hover { background: #1EBD5A; }

.btn-sm { padding: 0.5rem 1rem; font-size: var(--text-xs); }
.btn-lg { padding: 0.9rem 2rem; font-size: var(--text-base); }

/* ── 6. BADGE ───────────────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.04em;
}
.badge-primary { background: var(--color-primary-light); color: var(--color-primary); }
.badge-gold    { background: var(--color-gold-light);    color: var(--color-gold);    }
.badge-success { background: var(--color-success-bg);   color: var(--color-success); }
.badge-warning { background: var(--color-warning-bg);   color: var(--color-warning); }
.badge-danger  { background: var(--color-danger-bg);    color: var(--color-danger);  }

/* ── 7. HEADER ──────────────────────────────────────────────────── */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(250,249,246,.93);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition:
    border-color var(--duration) var(--ease),
    box-shadow var(--duration) var(--ease);
}

.site-header.scrolled {
  border-color: var(--color-border);
  box-shadow: var(--shadow-sm);
}

.navbar {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  height: var(--header-h);
}

/* Logo */
.nav-logo {
  display: flex;
  flex-direction: column;
  line-height: 1;
  flex-shrink: 0;
  margin-right: auto;
}

.nav-logo-main {
  font-family: var(--font-display);
  font-size: 1.7rem;
  font-weight: 700;
  font-style: italic;
  letter-spacing: -0.02em;
  color: var(--color-primary);
}

.nav-logo-sub {
  font-family: var(--font-body);
  font-size: 0.58rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-text-light);
  margin-top: 1px;
}

/* Desktop nav menú */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 0;
}

.nav-item { position: relative; }

.nav-link {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  transition:
    color var(--duration) var(--ease),
    background-color var(--duration) var(--ease);
}
.nav-link:hover,
.nav-link.active {
  color: var(--color-primary);
  background: var(--color-primary-light);
}

.nav-link svg {
  width: 10px; height: 10px; flex-shrink: 0;
  transition: transform var(--duration) var(--ease);
}
.nav-item:hover .nav-link svg { transform: rotate(180deg); }

/* Dropdown */
.nav-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%) translateY(-6px);
  min-width: 210px;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: var(--space-2);
  opacity: 0;
  pointer-events: none;
  transition:
    opacity var(--duration) var(--ease),
    transform var(--duration) var(--ease);
}

.nav-item:hover .nav-dropdown {
  opacity: 1;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}

.nav-dropdown a {
  display: block;
  padding: 0.45rem 0.75rem;
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  transition: color var(--duration) var(--ease), background var(--duration) var(--ease);
}
.nav-dropdown a:hover { color: var(--color-primary); background: var(--color-primary-light); }

/* Nav acciones */
.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
  margin-left: var(--space-2);
}

.nav-alumnos {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  transition:
    color var(--duration) var(--ease),
    border-color var(--duration) var(--ease),
    background var(--duration) var(--ease);
}
.nav-alumnos:hover { color: var(--color-primary); border-color: var(--color-primary); background: var(--color-primary-light); }
.nav-alumnos svg { width: 14px; height: 14px; }

/* Toggle hamburger */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  padding: 6px;
  border-radius: var(--radius-md);
  flex-shrink: 0;
}
.nav-toggle span {
  display: block;
  height: 2px;
  background: var(--color-text);
  border-radius: var(--radius-full);
  transition: transform var(--duration) var(--ease), opacity var(--duration) var(--ease);
}
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Menú móvil — fuera del <header> en el HTML para evitar
   que backdrop-filter bloquee su position:fixed */
.nav-mobile {
  position: fixed;
  top: var(--header-h);
  left: 0; right: 0; bottom: 0;
  background: var(--color-bg);
  padding: var(--space-6) var(--container-pad) var(--space-8);
  overflow-y: auto;
  transform: translateX(105%);
  transition: transform var(--duration-lg) var(--ease-out);
  z-index: 99;
  display: none;          /* oculto en desktop */
  flex-direction: column;
}
.nav-mobile.open { transform: translateX(0); }

.nav-mobile-links { margin-bottom: var(--space-6); }
.nav-mobile-links a {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) 0;
  border-bottom: 1px solid var(--color-border);
  font-size: var(--text-lg);
  font-weight: 500;
  color: var(--color-text);
}

.nav-mobile-actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-top: auto;
  padding-top: var(--space-6);
}

/* ── 8. IMAGEN PLACEHOLDER ──────────────────────────────────────── */
/* Usar mientras no haya imágenes reales. El gradiente desaparece
   automáticamente cuando la imagen carga correctamente. */
.img-wrap {
  overflow: hidden;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--color-bg-2) 0%, var(--color-border) 100%);
  position: relative;
}
.img-wrap img {
  width: 100%; height: 100%;
  object-fit: cover;
  display: block;
}

/* ── 9. FOOTER ──────────────────────────────────────────────────── */
.site-footer {
  background: var(--color-bg-dark);
  color: var(--color-text-inv);
  padding-top: var(--space-20);
  padding-bottom: var(--space-8);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-10);
  padding-bottom: var(--space-12);
  border-bottom: 1px solid rgba(255,255,255,.08);
  margin-bottom: var(--space-8);
}

.footer-logo-main {
  display: block;
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  font-style: italic;
  letter-spacing: -0.02em;
  color: var(--color-white);
  line-height: 1;
}
.footer-logo-sub {
  display: block;
  font-size: 0.58rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: rgba(255,255,255,.35);
  margin-top: 3px;
  margin-bottom: var(--space-5);
}

.footer-desc {
  font-size: var(--text-sm);
  color: rgba(255,255,255,.45);
  line-height: 1.75;
  max-width: 30ch;
  margin-bottom: var(--space-5);
}

.footer-contact p {
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: rgba(255,255,255,.45);
  margin-bottom: var(--space-2);
  max-width: none;
}
.footer-contact a { color: rgba(255,255,255,.65); transition: color var(--duration) var(--ease); }
.footer-contact a:hover { color: var(--color-white); }

.footer-col h4 {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(255,255,255,.35);
  margin-bottom: var(--space-4);
}
.footer-col ul li { margin-bottom: var(--space-2); }
.footer-col ul li a {
  font-size: var(--text-sm);
  color: rgba(255,255,255,.45);
  transition: color var(--duration) var(--ease);
}
.footer-col ul li a:hover { color: var(--color-white); }

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  font-size: var(--text-xs);
  color: rgba(255,255,255,.25);
  flex-wrap: wrap;
}
.footer-legal { display: flex; gap: var(--space-5); }
.footer-legal a { color: rgba(255,255,255,.25); transition: color var(--duration) var(--ease); }
.footer-legal a:hover { color: rgba(255,255,255,.55); }

/* ── 10. WHATSAPP FAB ───────────────────────────────────────────── */
.whatsapp-fab {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  z-index: 90;
  width: 56px; height: 56px;
  border-radius: var(--radius-full);
  background: #25D366;
  color: var(--color-white);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 20px rgba(37,211,102,.4);
  transition: transform var(--duration) var(--ease), box-shadow var(--duration) var(--ease);
}
.whatsapp-fab:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 28px rgba(37,211,102,.5);
}
.whatsapp-fab svg { width: 28px; height: 28px; }

/* ── 11. FORMULARIOS ────────────────────────────────────────────── */
.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}
.form-label {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
}
.form-control {
  padding: 0.75rem 1rem;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-white);
  font-size: var(--text-sm);
  color: var(--color-text);
  transition: border-color var(--duration) var(--ease), box-shadow var(--duration) var(--ease);
  width: 100%;
}
.form-control:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(123,29,60,.12);
}
.form-control::placeholder { color: var(--color-text-light); }
textarea.form-control { resize: vertical; min-height: 120px; }
select.form-control { appearance: none; cursor: pointer; }

/* ── 12. RESPONSIVE ─────────────────────────────────────────────── */
@media (max-width: 1024px) {
  .nav-menu,
  .nav-actions { display: none; }
  .nav-toggle  { display: flex; }
  .nav-logo    { margin-right: 0; }
  .nav-mobile  { display: flex; }   /* visible en mobile */

  .footer-grid { grid-template-columns: 1fr 1fr; gap: var(--space-8); }
}

@media (max-width: 640px) {
  .footer-grid   { grid-template-columns: 1fr; gap: var(--space-8); }
  .footer-bottom { flex-direction: column; text-align: center; }
  .footer-legal  { flex-wrap: wrap; justify-content: center; }
  .whatsapp-fab  { bottom: var(--space-4); right: var(--space-4); }
}