/* ==========================================================================
   KAHVE — Un Café con Altura
   Landing Page "Muy Pronto" — Styles
   ========================================================================== */

/* ---------- CSS Custom Properties (Design Tokens) ---------- */
:root {
  /* Primarios */
  --color-black:        #0F0C07;
  --color-black-deep:   #0A0805;
  --color-glacier:      #DDE4E9;
  --color-glacier-alt:  #E8ECEF;

  /* Acento */
  --color-gold:         #B89778;
  --color-gold-alt:     #A67C52;
  --color-gold-glow:    rgba(184, 151, 120, 0.25);

  /* Neutros */
  --color-cream:        #F2EDE5;
  --color-cream-alt:    #F5F2ED;

  /* Glaciar sutil */
  --color-ice:          #E0E8F0;
  --color-ice-alt:      #D1DCE8;

  /* Estados */
  --color-error:        #4A1C1C;
  --color-success:      #3A5A4A;

  /* Tipografía */
  --font-heading:       'Montserrat', sans-serif;
  --font-body:          'Inter', sans-serif;
  --font-accent:        'Playfair Display', serif;

  /* Espaciado (8pt grid) */
  --space-xs:   8px;
  --space-sm:   16px;
  --space-md:   24px;
  --space-lg:   48px;
  --space-xl:   80px;
  --space-2xl:  120px;
  --space-3xl:  160px;

  /* Transitions */
  --ease-out:   cubic-bezier(0.16, 1, 0.3, 1);
  --duration:   0.6s;
  --duration-fast: 0.3s;
}

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

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

body {
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 18px;
  line-height: 1.7;
  color: var(--color-glacier);
  background-color: var(--color-black);
  overflow-x: hidden;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

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

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

/* ---------- Loader ---------- */
.loader {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-black);
  transition: opacity 0.8s var(--ease-out), visibility 0.8s;
}

.loader.is-hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.loader__icon {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.loader__icon img {
  width: 80px;
  height: 80px;
  animation: loaderPulse 2s ease-in-out infinite;
}

.loader__vapor {
  display: flex;
  gap: 6px;
  margin-top: 12px;
}

.loader__vapor span {
  width: 3px;
  height: 20px;
  background: var(--color-gold);
  border-radius: 2px;
  opacity: 0.6;
  animation: vaporRise 1.6s ease-in-out infinite;
}

.loader__vapor span:nth-child(2) {
  animation-delay: 0.3s;
  height: 28px;
}

.loader__vapor span:nth-child(3) {
  animation-delay: 0.6s;
  height: 16px;
}

@keyframes loaderPulse {
  0%, 100% { opacity: 0.7; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.05); }
}

@keyframes vaporRise {
  0% { transform: translateY(0) scaleY(1); opacity: 0.6; }
  50% { transform: translateY(-12px) scaleY(1.3); opacity: 0.3; }
  100% { transform: translateY(0) scaleY(1); opacity: 0.6; }
}

/* ---------- Header ---------- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: var(--space-sm) var(--space-md);
  background: rgba(15, 12, 7, 0.6);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(221, 228, 233, 0.06);
  transition: background var(--duration-fast) ease, transform var(--duration-fast) ease;
}

.header.is-scrolled {
  background: rgba(15, 12, 7, 0.92);
}

.header__nav {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header__logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  transition: opacity var(--duration-fast) ease;
}

.header__logo:hover {
  opacity: 0.8;
}

.header__logo:focus-visible {
  outline: 2px solid var(--color-gold);
  outline-offset: 4px;
  border-radius: 4px;
}

.header__isotipo {
  width: 44px;
  height: 44px;
  transition: transform var(--duration-fast) var(--ease-out);
}

.header__logo:hover .header__isotipo {
  transform: scale(1.06);
}

.header__brand {
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: 1.25rem;
  letter-spacing: 0.15em;
  color: var(--color-glacier);
  text-transform: uppercase;
}

/* ---------- Hero Section ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-2xl) var(--space-md);
  overflow: hidden;
  /* Gradient top glaciar */
  background:
    radial-gradient(ellipse at 50% 0%, rgba(209, 220, 232, 0.07) 0%, transparent 60%),
    linear-gradient(180deg, var(--color-black-deep) 0%, var(--color-black) 100%);
}

.hero__particles {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.hero__content {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  max-width: 680px;
}

.hero__isotipo {
  margin-bottom: var(--space-lg);
}

.hero__isotipo img {
  width: 300px;
  height: 300px;
  filter: drop-shadow(0 0 60px rgba(184, 151, 120, 0.12));
}

.hero__title {
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: clamp(2.5rem, 8vw, 5rem);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-gold);
  line-height: 1.1;
  margin-bottom: var(--space-md);
}

/* Divider */
.hero__divider {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
}

.hero__divider-line {
  display: block;
  width: 60px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-gold), transparent);
}

.hero__divider-diamond {
  width: 8px;
  height: 8px;
  background: var(--color-gold);
  transform: rotate(45deg);
  flex-shrink: 0;
}

.hero__subtitle {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: clamp(1.5rem, 4vw, 2.2rem);
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--color-glacier);
  margin-bottom: var(--space-xs);
}

.hero__tagline {
  font-family: var(--font-accent);
  font-weight: 400;
  font-style: italic;
  font-size: clamp(1.1rem, 2.5vw, 1.4rem);
  color: var(--color-gold);
  letter-spacing: 0.05em;
  margin-bottom: var(--space-xl);
}

/* Subscription form */
.hero__form {
  width: 100%;
  max-width: 480px;
}

.hero__form-group {
  display: flex;
  gap: 0;
  border: 1px solid var(--color-gold);
  border-radius: 4px;
  overflow: hidden;
  transition: border-color var(--duration-fast) ease, box-shadow var(--duration-fast) ease;
}

.hero__form-group:focus-within {
  border-color: var(--color-gold);
  box-shadow: 0 0 0 3px var(--color-gold-glow);
}

.hero__input {
  flex: 1;
  padding: var(--space-sm) var(--space-md);
  background: rgba(255, 255, 255, 0.04);
  border: none;
  color: var(--color-cream);
  font-family: var(--font-body);
  font-size: 0.95rem;
  outline: none;
}

.hero__input::placeholder {
  color: rgba(221, 228, 233, 0.4);
}

.hero__btn {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-sm) var(--space-md);
  background: var(--color-gold);
  color: var(--color-black);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  white-space: nowrap;
  transition: background var(--duration-fast) ease, transform var(--duration-fast) ease;
}

.hero__btn:hover {
  background: var(--color-gold-alt);
  transform: translateX(2px);
}

.hero__btn:focus-visible {
  outline: 2px solid var(--color-cream);
  outline-offset: -2px;
}

.hero__btn-icon {
  transition: transform var(--duration-fast) ease;
}

.hero__btn:hover .hero__btn-icon {
  transform: translateX(3px);
}

.hero__form-hint {
  margin-top: var(--space-sm);
  font-size: 0.8rem;
  color: rgba(221, 228, 233, 0.4);
}

.hero__form-success {
  margin-top: var(--space-sm);
  font-size: 0.9rem;
  color: var(--color-gold);
  font-family: var(--font-accent);
  font-style: italic;
}

.hero__form-error {
  margin-top: var(--space-sm);
  font-size: 0.9rem;
  color: #c97a7a;
}

/* Scroll indicator */
.hero__scroll {
  position: absolute;
  bottom: var(--space-lg);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xs);
}

.hero__scroll-text {
  font-family: var(--font-heading);
  font-size: 0.65rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: rgba(221, 228, 233, 0.35);
}

.hero__scroll-line {
  display: block;
  width: 1px;
  height: 40px;
  background: linear-gradient(180deg, var(--color-gold), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
  0%, 100% { opacity: 0.4; transform: scaleY(1); }
  50% { opacity: 1; transform: scaleY(1.2); }
}

/* ---------- About Section (Light mode tease) ---------- */
.about {
  background-color: var(--color-cream);
  padding: var(--space-3xl) var(--space-md);
  position: relative;
}

.about::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 120px;
  background: linear-gradient(180deg, var(--color-black), var(--color-cream));
  pointer-events: none;
}

.about__container {
  max-width: 700px;
  margin: 0 auto;
  text-align: center;
  position: relative;
  z-index: 1;
}

.about__icon {
  margin-bottom: var(--space-lg);
}

.about__icon img {
  width: 100px;
  height: 100px;
  margin: 0 auto;
  opacity: 0.15;
}

.about__title {
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: clamp(1.5rem, 4vw, 2.2rem);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-black);
  margin-bottom: var(--space-md);
}

.about__text {
  font-family: var(--font-body);
  font-weight: 300;
  font-size: 1.05rem;
  line-height: 1.8;
  color: rgba(15, 12, 7, 0.7);
  margin-bottom: var(--space-sm);
}

.about__text:last-child {
  font-family: var(--font-accent);
  font-style: italic;
  font-weight: 600;
  font-size: 1.15rem;
  color: var(--color-gold-alt);
  margin-top: var(--space-md);
}

/* ---------- Footer ---------- */
.footer {
  background: var(--color-black-deep);
  padding: var(--space-xl) var(--space-md) var(--space-lg);
  border-top: 1px solid rgba(184, 151, 120, 0.1);
}

.footer__container {
  max-width: 700px;
  margin: 0 auto;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
}

.footer__logo img {
  width: 56px;
  height: 56px;
  opacity: 0.6;
  margin-bottom: var(--space-xs);
}

.footer__brand {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.9rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-glacier);
}

.footer__separator {
  color: var(--color-gold);
  margin: 0 var(--space-xs);
}

.footer__location {
  font-family: var(--font-accent);
  font-style: italic;
  font-size: 0.9rem;
  color: rgba(221, 228, 233, 0.4);
}

.footer__social {
  display: flex;
  gap: var(--space-md);
  margin: var(--space-sm) 0;
}

.footer__social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  color: var(--color-gold);
  border: 1px solid rgba(184, 151, 120, 0.25);
  border-radius: 50%;
  transition: all var(--duration-fast) ease;
}

.footer__social-link:hover {
  background: var(--color-gold);
  color: var(--color-black);
  border-color: var(--color-gold);
  transform: translateY(-2px);
}

.footer__social-link:focus-visible {
  outline: 2px solid var(--color-gold);
  outline-offset: 3px;
}

.footer__copy {
  font-size: 0.75rem;
  color: rgba(221, 228, 233, 0.25);
  margin-top: var(--space-sm);
}

/* ---------- Animations ---------- */
.anim-fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 1s var(--ease-out), transform 1s var(--ease-out);
}

.anim-fade-in.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.anim-delay-1 { transition-delay: 0.2s; }
.anim-delay-2 { transition-delay: 0.4s; }
.anim-delay-3 { transition-delay: 0.6s; }
.anim-delay-4 { transition-delay: 0.8s; }
.anim-delay-5 { transition-delay: 1.0s; }

/* Scroll animations */
.anim-scroll {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s var(--ease-out), transform 0.8s var(--ease-out);
}

.anim-scroll.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- Responsive ---------- */

/* Tablet */
@media (max-width: 768px) {
  .hero {
    padding: var(--space-xl) var(--space-sm);
  }

  .hero__isotipo img {
    width: 220px;
    height: 220px;
  }

  .hero__form-group {
    flex-direction: column;
  }

  .hero__btn {
    justify-content: center;
    padding: var(--space-sm);
  }

  .about {
    padding: var(--space-2xl) var(--space-sm);
  }
}

/* Mobile */
@media (max-width: 480px) {
  body {
    font-size: 16px;
  }

  .header {
    padding: var(--space-xs) var(--space-sm);
  }

  .header__brand {
    font-size: 1rem;
  }

  .header__isotipo {
    width: 36px;
    height: 36px;
  }

  .hero__isotipo img {
    width: 180px;
    height: 180px;
  }

  .hero__title {
    letter-spacing: 0.12em;
  }

  .hero__divider-line {
    width: 40px;
  }

  .hero__scroll {
    display: none;
  }

  .footer {
    padding: var(--space-lg) var(--space-sm) var(--space-md);
  }
}

/* ---------- Focus / Accessibility ---------- */
:focus-visible {
  outline: 2px solid var(--color-gold);
  outline-offset: 3px;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .anim-fade-in,
  .anim-scroll {
    opacity: 1;
    transform: none;
  }
}

/* Print */
@media print {
  .loader,
  .hero__particles,
  .hero__scroll,
  .hero__form {
    display: none;
  }

  body {
    background: white;
    color: black;
  }
}