/* ===================================================
   TRIBUART — Sitio en Construcción
   Design System: Organic Minimalism
   =================================================== */

/* ---------- DESIGN TOKENS ---------- */
:root {
  /* Core palette — earthy, warm, organic */
  --bg: #fbf9f4;
  --surface: #f5f3ee;
  --surface-container: #f0eee9;
  --surface-high: #eae8e3;
  --surface-highest: #e4e2dd;

  --on-surface: #1b1c19;
  --on-surface-variant: #444842;
  --outline: #747872;
  --outline-variant: #c4c8c0;

  --primary: #182319;
  --primary-container: #2d392d;
  --on-primary: #ffffff;

  --secondary: #904b36;
  --secondary-container: #fea58a;

  --tertiary: #212121;
  --tertiary-container: #363636;
  --on-tertiary: #ffffff;

  --accent-green: #556254;
  --accent-warm: #ffdbd0;

  --error: #ba1a1a;

  /* Typography */
  --font-headline: 'Noto Serif', Georgia, serif;
  --font-body: 'Manrope', 'Segoe UI', sans-serif;

  /* Spacing */
  --unit: 8px;
  --gutter: 24px;
  --margin: clamp(24px, 5vw, 64px);
  --container-max: 1280px;
  --section-gap: 120px;

  /* Shape */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-soft: 0 32px 64px -12px rgba(85, 98, 84, .08);
  --shadow-hover: 0 24px 48px -8px rgba(85, 98, 84, .14);

  /* Transitions */
  --ease-out: cubic-bezier(.22, 1, .36, 1);
  --ease-spring: cubic-bezier(.34, 1.56, .64, 1);
  --dur-fast: 200ms;
  --dur-normal: 400ms;
  --dur-slow: 700ms;
}

/* ---------- RESET & BASE ---------- */
*,
*::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-size: 16px;
  line-height: 1.6;
  color: var(--on-surface);
  background: var(--bg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

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

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

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

/* ---------- HEADER ---------- */
#site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(253, 252, 251, .85);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border-bottom: 1px solid rgba(45, 57, 45, .07);
  transition: box-shadow var(--dur-normal) var(--ease-out);
}

#site-header.scrolled {
  box-shadow: 0 1px 24px rgba(45, 57, 45, .06);
}

.header-inner {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  max-width: 1440px;
  margin: 0 auto;
  padding: 1.25rem var(--margin);
}

.hero-logo {
  height: clamp(100px, 16vw, 250px);
  width: auto;
  object-fit: contain;
  margin-bottom: calc(var(--unit) * 1);
  transform-origin: left center;
  opacity: 0.9;
}

.header-nav {
  display: flex;
  align-items: center;
}

.lang-btn {
  display: flex;
  align-items: center;
  gap: 4px;
  font-family: var(--font-headline);
  font-size: 14px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--primary-container);
  padding: 8px 16px;
  border-radius: var(--radius-full);
  transition: background var(--dur-fast) ease, color var(--dur-fast) ease;
}

.lang-btn:hover {
  background: var(--surface);
}

.lang-divider {
  opacity: .3;
  margin: 0 2px;
}

.lang-inactive {
  opacity: .4;
  transition: opacity var(--dur-fast) ease;
}

.lang-btn:hover .lang-inactive {
  opacity: .7;
}

/* ---------- MAIN / HERO ---------- */
#main-content {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--margin);
  position: relative;
}

/* Subtle background grain texture */
#main-content::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.03'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 0;
}

.hero-grid {
  position: relative;
  z-index: 1;
  max-width: var(--container-max);
  width: 100%;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--margin);
  align-items: center;
}

/* --- Text Content --- */
.hero-text {
  display: flex;
  flex-direction: column;
  gap: calc(var(--unit) * 3);
  padding-right: calc(var(--unit) * 6);
}

.hero-tag {
  display: flex;
  align-items: center;
  gap: 12px;
}

.tag-line {
  display: inline-block;
  width: 32px;
  height: 1px;
  background: var(--secondary);
}

.tag-label {
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--secondary);
}

.hero-title {
  font-family: var(--font-headline);
  font-size: clamp(36px, 5vw, 56px);
  font-weight: 400;
  line-height: 1.08;
  letter-spacing: -.02em;
  color: var(--on-surface);
  text-wrap: balance;
}

.hero-desc {
  font-family: var(--font-body);
  font-size: 18px;
  line-height: 1.7;
  color: var(--on-surface-variant);
  max-width: 460px;
}

/* --- Signup Form --- */
.signup-block {
  padding-top: calc(var(--unit) * 2);
}

.signup-form {
  display: flex;
  gap: 12px;
  align-items: stretch;
}

.input-wrap {
  position: relative;
  flex: 1;
  max-width: 320px;
}

.signup-input {
  width: 100%;
  font-family: var(--font-body);
  font-size: 14px;
  color: var(--on-surface);
  background: transparent;
  border: none;
  border-bottom: 1.5px solid var(--outline-variant);
  padding: 14px 0 10px;
  outline: none;
  transition: border-color var(--dur-normal) var(--ease-out);
}

.signup-input:focus {
  border-color: var(--secondary);
}

.signup-input::placeholder {
  color: transparent;
}

.signup-label {
  position: absolute;
  left: 0;
  top: 14px;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 400;
  color: var(--outline);
  pointer-events: none;
  transition: all var(--dur-normal) var(--ease-out);
}

.signup-input:focus+.signup-label,
.signup-input:not(:placeholder-shown)+.signup-label {
  top: -4px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--secondary);
}

.cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .05em;
  text-transform: uppercase;
  color: var(--on-tertiary);
  background: var(--tertiary-container);
  padding: 14px 28px;
  border-radius: var(--radius-full);
  box-shadow: 0 2px 12px rgba(33, 33, 33, .12);
  transition:
    background var(--dur-fast) ease,
    box-shadow var(--dur-normal) var(--ease-out),
    transform var(--dur-fast) var(--ease-spring);
  white-space: nowrap;
  flex-shrink: 0;
}

.cta-btn:hover {
  background: var(--tertiary);
  box-shadow: 0 4px 24px rgba(33, 33, 33, .22);
  transform: translateY(-1px);
}

.cta-btn:active {
  transform: translateY(0) scale(.97);
}

.btn-icon {
  font-size: 18px;
  transition: transform var(--dur-fast) var(--ease-spring);
}

.cta-btn:hover .btn-icon {
  transform: translateX(4px);
}

.signup-success {
  font-size: 14px;
  color: var(--accent-green);
  font-weight: 500;
  margin-top: 12px;
  animation: fadeIn .6s var(--ease-out) forwards;
}

.hidden {
  display: none !important;
}

/* --- Social links --- */
.social-row {
  display: flex;
  gap: 16px;
  align-items: center;
  padding-top: calc(var(--unit) * 1);
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  color: var(--outline);
  border: 1px solid var(--outline-variant);
  transition:
    color var(--dur-fast) ease,
    border-color var(--dur-fast) ease,
    background var(--dur-fast) ease,
    transform var(--dur-fast) var(--ease-spring);
}

.social-link:hover {
  color: var(--primary-container);
  border-color: var(--primary-container);
  background: rgba(45, 57, 45, .04);
  transform: translateY(-2px);
}

.social-link .material-symbols-outlined {
  font-size: 20px;
}

/* --- Hero Image --- */
.hero-image-wrap {
  position: relative;
  width: 100%;
}

.image-frame {
  position: relative;
  width: 100%;
  aspect-ratio: 3 / 4;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid rgba(196, 200, 192, .3);
  box-shadow: var(--shadow-soft);
  background: var(--surface);
}

.image-border-inner {
  position: absolute;
  inset: 8px;
  border: 1px solid rgba(255, 255, 255, .5);
  border-radius: calc(var(--radius-lg) - 4px);
  z-index: 2;
  pointer-events: none;
}

.hero-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  transition: transform var(--dur-slow) var(--ease-out);
}

.image-frame:hover .hero-image {
  transform: scale(1.03);
}

/* Floating organic accents */
.float-accent {
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
  z-index: -1;
}

.float-accent-1 {
  width: 200px;
  height: 200px;
  background: radial-gradient(circle, rgba(144, 75, 54, .06) 0%, transparent 70%);
  top: -40px;
  right: -60px;
  animation: floatSlow 8s ease-in-out infinite;
}

.float-accent-2 {
  width: 160px;
  height: 160px;
  background: radial-gradient(circle, rgba(85, 98, 84, .06) 0%, transparent 70%);
  bottom: -30px;
  left: -50px;
  animation: floatSlow 10s ease-in-out infinite reverse;
}

/* ---------- FOOTER ---------- */
#site-footer {
  background: transparent;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1440px;
  margin: 0 auto;
  padding: 3rem var(--margin);
  border-top: 1px solid rgba(196, 200, 192, .2);
  flex-wrap: wrap;
  gap: 24px;
}

.footer-left {
  display: flex;
  align-items: center;
  gap: 16px;
}

.footer-logo {
  height: 32px;
  width: auto;
  opacity: .7;
  object-fit: contain;
}

.footer-copy {
  font-family: var(--font-headline);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--primary-container);
  opacity: .7;
}

.footer-right {
  display: flex;
  gap: 32px;
  align-items: center;
}

.footer-link {
  font-family: var(--font-headline);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--primary-container);
  opacity: .45;
  transition: opacity var(--dur-fast) ease;
}

.footer-link:hover {
  opacity: 1;
}

/* ---------- ANIMATIONS ---------- */
@keyframes floatSlow {

  0%,
  100% {
    transform: translate(0, 0) scale(1);
  }

  50% {
    transform: translate(12px, -16px) scale(1.05);
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Entry animations */
[data-animate] {
  opacity: 0;
  transform: translateY(24px);
  transition:
    opacity .8s var(--ease-out),
    transform .8s var(--ease-out);
}

[data-animate="fade-scale"] {
  transform: translateY(24px) scale(.97);
  transition:
    opacity .9s var(--ease-out),
    transform .9s var(--ease-out);
}

[data-animate].is-visible {
  opacity: 1;
  transform: translateY(0) scale(1);
}

/* Staggered delays */
[data-delay="0"] {
  transition-delay: .1s;
}

[data-delay="1"] {
  transition-delay: .25s;
}

[data-delay="2"] {
  transition-delay: .4s;
}

[data-delay="3"] {
  transition-delay: .55s;
}

[data-delay="4"] {
  transition-delay: .7s;
}

/* ---------- RESPONSIVE ---------- */
@media (max-width: 900px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: calc(var(--unit) * 6);
  }

  .hero-text {
    padding-right: 0;
    text-align: center;
    align-items: center;
  }

  .hero-tag {
    justify-content: center;
  }

  .hero-desc {
    max-width: 100%;
  }

  .hero-image-wrap {
    max-width: 480px;
    margin: 0 auto;
  }

  .signup-form {
    flex-direction: column;
    align-items: center;
  }

  .input-wrap {
    max-width: 100%;
    width: 100%;
  }

  .social-row {
    justify-content: center;
  }

  .footer-inner {
    flex-direction: column;
    text-align: center;
  }

  .footer-left {
    flex-direction: column;
  }

  .footer-right {
    flex-wrap: wrap;
    justify-content: center;
    gap: 20px;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 32px;
  }

  .hero-desc {
    font-size: 16px;
  }
}

/* ---------- LOADING SCREEN ---------- */
#page-loader {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity .6s var(--ease-out), visibility .6s;
}

#page-loader.done {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.loader-logo {
  width: 80px;
  height: 80px;
  object-fit: contain;
  animation: pulse-logo 1.8s ease-in-out infinite;
}

@keyframes pulse-logo {

  0%,
  100% {
    opacity: .3;
    transform: scale(.95);
  }

  50% {
    opacity: 1;
    transform: scale(1);
  }
}