/* =========================================================================
   MIBRO — Theme principal
   ========================================================================= */

/* -----------------------------------
   1. Fuentes
   ----------------------------------- */
@font-face {
  font-family: 'Larken';
  src: url('../fonts/Larken-Light.woff2') format('woff2'), url('../fonts/Larken-Light.ttf') format('truetype');
  font-weight: 300;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Mulish';
  src: url('../fonts/Mulish-Regular.woff2') format('woff2'), url('../fonts/Mulish-Regular.ttf') format('truetype');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Mulish';
  src: url('../fonts/Mulish-SemiBold.woff2') format('woff2'), url('../fonts/Mulish-SemiBold.ttf') format('truetype');
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Mulish';
  src: url('../fonts/Mulish-Bold.woff2') format('woff2'), url('../fonts/Mulish-Bold.ttf') format('truetype');
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Myriad Pro';
  src: url('../fonts/MyriadPro-Regular.woff2') format('woff2'), url('../fonts/MyriadPro-Regular.otf') format('opentype');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

/* -----------------------------------
   2. Variables — paleta MIBRO
   ----------------------------------- */
:root {
  /* Colores */
  --color-cream: #F2EBDC;          /* fondo principal */
  --color-cream-light: #F8F3E6;
  --color-green-dark: #3D4A2C;     /* verde oscuro / bandas */
  --color-green: #53614C;          /* verde principal MIBRO (botones) */
  --color-green-soft: #6B7A4F;
  --color-text: #2D3329;           /* texto base */
  --color-text-muted: #6B6B62;
  --color-white: #FFFFFF;
  --color-overlay: rgba(0, 0, 0, 0.35);

  /* Tipografías */
  --font-serif: 'Larken', Georgia, 'Times New Roman', serif;
  --font-sans: 'Mulish', system-ui, -apple-system, sans-serif;
  --font-display: 'Myriad Pro', 'Mulish', sans-serif;

  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2.5rem;
  --space-xl: 4rem;
  --space-2xl: 6rem;
  --space-3xl: 8rem;

  /* Layout */
  --container-max: 1280px;
  --container-narrow: 880px;
  --content-max: 720px;

  /* Misc */
  --radius: 6px;
  --radius-pill: 999px;
  --transition: 0.3s ease;
}

/* -----------------------------------
   3. Reset + base
   ----------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
}

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-weight: 400;
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-cream);
  overflow-x: hidden;
}

img, picture, svg, video {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition), opacity var(--transition);
}

:focus-visible {
  outline: 2px solid var(--color-green);
  outline-offset: 3px;
}

button {
  font: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

ul, ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0 0 1rem;
  font-family: var(--font-serif);
  font-weight: 300;
  line-height: 1.15;
  letter-spacing: -0.01em;
}

h1 { font-size: clamp(2.25rem, 5.5vw, 4.25rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }
h4 { font-size: 1.25rem; }

p {
  margin: 0 0 1rem;
}

p:last-child { margin-bottom: 0; }

/* -----------------------------------
   4. Layout utilities
   ----------------------------------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 4vw, 2.5rem);
}

.container--narrow {
  max-width: var(--container-narrow);
}

.section {
  padding-block: var(--space-2xl);
  position: relative;
}

.section--tight  { padding-block: var(--space-xl); }
.section--loose  { padding-block: var(--space-3xl); }

.section--dark {
  background-color: var(--color-green-dark);
  color: var(--color-cream-light);
}

.section--dark h1,
.section--dark h2,
.section--dark h3 {
  color: var(--color-cream-light);
}

.text-center { text-align: center; }
.text-serif  { font-family: var(--font-serif); font-weight: 300; }
.text-muted  { color: var(--color-text-muted); }
.text-green  { color: var(--color-green-dark); }
.text-uppercase { text-transform: uppercase; letter-spacing: 0.15em; font-size: 0.85rem; }

/* -----------------------------------
   5. Botones
   ----------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 2rem;
  border: 1px solid var(--color-green-dark);
  border-radius: var(--radius-pill);
  background-color: transparent;
  color: var(--color-green-dark);
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.02em;
  text-transform: none;
  cursor: pointer;
  transition: all var(--transition);
}

.btn:hover {
  background-color: var(--color-green-dark);
  color: var(--color-cream);
}

.btn:active {
  transform: translateY(1px);
}

.btn:focus-visible {
  outline: 2px solid var(--color-green);
  outline-offset: 3px;
}

.btn--solid {
  background-color: var(--color-green);
  border-color: var(--color-green);
  color: var(--color-cream);
}
.btn--solid:hover {
  background-color: var(--color-green-dark);
  border-color: var(--color-green-dark);
}

.btn--light {
  border-color: var(--color-cream-light);
  color: var(--color-cream-light);
}
.btn--light:hover {
  background-color: var(--color-cream-light);
  color: var(--color-green-dark);
}
.btn--light:active {
  transform: translateY(1px);
}

/* -----------------------------------
   6. Header / Menú
   ----------------------------------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 2rem 0;
  background-color: transparent;
  transition: background-color var(--transition), padding var(--transition);
  /* Estado por defecto: sobre el hero (fondo oscuro) → contenido claro */
  --header-color: var(--color-cream-light);
  --header-logo-filter: none;
}

.site-header.is-scrolled {
  background-color: rgba(242, 235, 220, 0.95);
  backdrop-filter: blur(8px);
  padding: 1rem 0;
  box-shadow: 0 1px 0 rgba(0,0,0,0.06);
  /* Estado scrolleado → contenido oscuro */
  --header-color: var(--color-green-dark);
  --header-logo-filter: invert(20%) sepia(20%) saturate(800%) hue-rotate(35deg) brightness(60%);
}

.site-header .container {
  max-width: 1400px;
}
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.site-logo {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-serif);
  font-size: 1.5rem;
  color: var(--header-color);
}

.site-logo img {
  max-height: 32px;
  width: auto;
  filter: var(--header-logo-filter);
  transition: filter var(--transition);
}

.nav-primary,
.nav-primary ul {
  display: flex;
  gap: 2.25rem;
  align-items: center;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-primary a {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--header-color);
  letter-spacing: 0.04em;
  transition: opacity var(--transition);
}

.nav-primary a:hover {
  opacity: 0.7;
}

.nav-toggle span {
  background: var(--header-color);
}

.nav-toggle {
  display: none;
  width: 32px;
  height: 32px;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
}

.nav-toggle span {
  display: block;
  height: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

/* Hamburguesa → X al abrir */
.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}
.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

@media (max-width: 900px) {
  .nav-toggle {
    display: flex;
    position: relative;
    z-index: 110;
  }
  .nav-primary {
    position: fixed;
    inset: 0;
    background: var(--color-cream);
    flex-direction: column;
    justify-content: center;
    gap: 2rem;
    transform: translateX(100%);
    transition: transform var(--transition);
  }
  .nav-primary.is-open {
    transform: translateX(0);
  }
  .nav-primary a {
    font-size: 1.5rem;
    color: var(--color-green-dark);
  }
  /* Menú abierto: el toggle (barras) y el logo deben verse oscuros
     sobre el fondo cream del overlay, incluso sobre el hero oscuro */
  .site-header:has(.nav-primary.is-open) {
    --header-color: var(--color-green-dark);
    --header-logo-filter: invert(20%) sepia(20%) saturate(800%) hue-rotate(35deg) brightness(60%);
    /* Quitar backdrop-filter: crea un containing block que ancla el
       position:fixed del menú al header en vez del viewport */
    backdrop-filter: none;
  }
}

/* -----------------------------------
   7. Footer básico (luego customizamos)
   ----------------------------------- */
.site-footer {
  background-color: var(--color-cream);
  color: var(--color-text);
}

/* -----------------------------------
   8. Animaciones AOS (override defaults sutiles)
   ----------------------------------- */
[data-aos] {
  pointer-events: none;
}
[data-aos].aos-animate {
  pointer-events: auto;
}

/* AOS deshabilitado en mobile (disable: 'phone' en main.js):
   el CSS base de AOS mantiene opacity/transform iniciales en los
   [data-aos] que nunca reciben .aos-animate → desborde horizontal.
   Aquí lo anulamos para que el contenido se vea estático y completo. */
@media (max-width: 480px) {
  html:not(.no-js) [data-aos^="fade"][data-aos^="fade"],
  [data-aos] {
    opacity: 1 !important;
    transform: none !important;
    pointer-events: auto !important;
    transition: none !important;
  }
}

/* -----------------------------------
   9. Helpers
   ----------------------------------- */
.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

.bg-cream { background-color: var(--color-cream); }
.bg-dark  { background-color: var(--color-green-dark); color: var(--color-cream-light); }