/* =========================================================
   Illovo Concrete — Design Tokens & System
   Industrial precast palette: charcoal / concrete / heavy-metal yellow
   ========================================================= */

:root {
  /* Color tokens */
  --color-ink: #15181b;
  --color-ink-soft: #23272b;
  --color-concrete-900: #3a3d40;
  --color-concrete-600: #6c7075;
  --color-concrete-300: #b9b6ae;
  --color-concrete-100: #eeece7;
  --color-concrete-50: #f7f6f3;
  --color-white: #ffffff;
  --color-accent: #f2b705;
  --color-accent-dark: #d19f00;
  --color-accent-ink: #7a5900;
  --color-accent-tint: #fbe8b0;
  --color-focus: #4d9fff;

  /* Surfaces */
  --surface-dark: var(--color-ink);
  --surface-light: var(--color-concrete-50);
  --text-on-dark: #f3f1ec;
  --text-on-dark-muted: #9a9d9f;
  --text-on-light: var(--color-ink);
  --text-on-light-muted: var(--color-concrete-600);

  /* Spacing scale (8pt base) */
  --sp-1: 8px;
  --sp-2: 16px;
  --sp-3: 24px;
  --sp-4: 32px;
  --sp-5: 48px;
  --sp-6: 64px;
  --sp-7: 96px;
  --sp-8: 128px;

  /* Type scale */
  --font-display: "Inter Tight", Inter, "Helvetica Neue", Arial, sans-serif;
  --font-body: Inter, "Helvetica Neue", Arial, sans-serif;
  --fs-eyebrow: 0.75rem;
  --fs-body: 1rem;
  --fs-lead: 1.25rem;
  --fs-h3: 1.75rem;
  --fs-h2: 2.5rem;
  --fs-h1: clamp(2.75rem, 5vw + 1rem, 5.5rem);
  --lh-tight: 1.05;
  --lh-normal: 1.5;

  --radius-sm: 2px;
  --radius-md: 4px;
  --container: 1280px;
  --motion-fast: 160ms;
  --motion-base: 280ms;
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

/* Reset */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
html, body { max-width: 100%; overflow-x: hidden; }
body {
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: var(--lh-normal);
  color: var(--text-on-light);
  background: var(--surface-light);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
h1, h2, h3, h4 { font-family: var(--font-display); line-height: var(--lh-tight); margin: 0 0 var(--sp-2); font-weight: 700; letter-spacing: -0.02em; }
p { margin: 0 0 var(--sp-2); }
a { color: inherit; }
ul { margin: 0; padding: 0; list-style: none; }
button { font-family: inherit; cursor: pointer; }

a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 2px;
}

.container {
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--sp-3);
}
@media (min-width: 900px) {
  .container { padding-inline: var(--sp-5); }
}

.section { padding-block: var(--sp-7); }
.section--dark { background: var(--surface-dark); color: var(--text-on-dark); }
.section--dark .eyebrow { color: var(--color-accent); }
.section--dark p { color: var(--text-on-dark-muted); }

.eyebrow {
  display: block;
  font-size: var(--fs-eyebrow);
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-accent-ink);
  margin-bottom: var(--sp-2);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-1);
  padding: 14px 28px;
  font-weight: 700;
  font-size: 0.95rem;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  text-decoration: none;
  transition: transform var(--motion-fast) var(--ease), background var(--motion-fast) var(--ease), color var(--motion-fast) var(--ease);
}
.btn--primary { background: var(--color-accent); color: var(--color-ink); }
.btn--primary:hover { background: var(--color-accent-dark); transform: translateY(-2px); }
.btn--ghost-dark { background: transparent; border-color: rgba(255,255,255,0.35); color: var(--text-on-dark); }
.btn--ghost-dark:hover { background: rgba(255,255,255,0.08); transform: translateY(-2px); }
.btn--ghost-light { background: transparent; border-color: var(--color-ink); color: var(--color-ink); }
.btn--ghost-light:hover { background: var(--color-ink); color: var(--text-on-dark); }
.btn--whatsapp { background: #1f8a4c; color: #fff; }
.btn--whatsapp:hover { background: #166a3a; transform: translateY(-2px); }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(21, 24, 27, 0.92);
  backdrop-filter: blur(6px);
  color: var(--text-on-dark);
}
.site-header__bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: var(--sp-2);
}
.logo { font-family: var(--font-display); font-weight: 800; font-size: 1.15rem; text-decoration: none; letter-spacing: -0.01em; }
.logo span { color: var(--color-accent); }
.nav { display: none; gap: var(--sp-4); }
.nav a { text-decoration: none; font-size: 0.92rem; font-weight: 600; color: var(--text-on-dark-muted); transition: color var(--motion-fast) var(--ease); }
.nav a:hover, .nav a[aria-current="page"] { color: var(--text-on-dark); }
.nav-actions { display: flex; align-items: center; gap: var(--sp-2); }
.nav-actions .btn--primary { display: none; }
.nav-toggle { background: none; border: 1px solid rgba(255,255,255,0.3); color: var(--text-on-dark); border-radius: var(--radius-sm); padding: 8px 12px; white-space: nowrap; }
@media (min-width: 960px) {
  .nav { display: flex; }
  .nav-actions .btn--primary { display: inline-flex; }
  .nav-toggle { display: none; }
}
.mobile-nav { display: none; flex-direction: column; gap: var(--sp-1); padding-bottom: var(--sp-2); }
.mobile-nav.is-open { display: flex; }
.mobile-nav a { text-decoration: none; color: var(--text-on-dark); padding: var(--sp-1) 0; border-bottom: 1px solid rgba(255,255,255,0.08); font-weight: 600; }
@media (min-width: 960px) { .mobile-nav { display: none !important; } }

/* Hero */
.hero {
  position: relative;
  min-height: 88vh;
  display: flex;
  align-items: flex-end;
  color: var(--text-on-dark);
  background: linear-gradient(180deg, rgba(21,24,27,0.55) 0%, rgba(21,24,27,0.88) 100%), var(--color-ink);
  overflow: hidden;
}
/* Hero slideshow: 5 photos crossfade + slow Ken Burns zoom under a black scrim */
.hero__slides {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.hero__slide {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  opacity: 0;
  animation: hero-kenburns 60s infinite;
  animation-timing-function: ease-in-out;
  will-change: opacity, transform;
}
.hero__slide:nth-of-type(odd) { transform-origin: 35% 40%; }
.hero__slide:nth-of-type(even) { transform-origin: 65% 60%; }
@keyframes hero-kenburns {
  0%   { opacity: 0; transform: scale(1); }
  9%   { opacity: 1; }
  14%  { opacity: 1; }
  20%  { opacity: 0; transform: scale(1.14); }
  100% { opacity: 0; transform: scale(1.14); }
}
.hero__scrim {
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(180deg, rgba(21,24,27,0.5) 0%, rgba(21,24,27,0.9) 100%);
}
.hero--photo .hero__texture { z-index: 2; }
.hero--photo .hero__content { z-index: 3; }

/* Single-photo hero (interior pages): a slow breathing zoom, no crossfade needed */
.hero__slide--solo {
  opacity: 1;
  animation: hero-kenburns-solo 30s ease-in-out infinite alternate;
}
@keyframes hero-kenburns-solo {
  from { transform: scale(1); }
  to   { transform: scale(1.12); }
}
@media (prefers-reduced-motion: reduce) {
  .hero__slide {
    animation: none;
    opacity: 0;
    transform: none;
  }
  .hero__slide:first-child { opacity: 1; }
}
.hero__texture {
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 80% 20%, rgba(242,183,5,0.14), transparent 55%);
  pointer-events: none;
}
.hero__content { position: relative; padding-block: var(--sp-6) var(--sp-6); max-width: 780px; }
.hero h1 { font-size: var(--fs-h1); }
.hero__lead { font-size: var(--fs-lead); color: var(--text-on-dark-muted); max-width: 46ch; }
.hero__cta { display: flex; flex-wrap: wrap; gap: var(--sp-2); margin-top: var(--sp-4); }
.hero__note { margin-top: var(--sp-2); font-size: 0.8rem; color: var(--text-on-dark-muted); }

/* Stats */
.stat-row { display: grid; gap: var(--sp-4); grid-template-columns: repeat(2, minmax(0, 1fr)); }
@media (min-width: 800px) { .stat-row { grid-template-columns: repeat(4, minmax(0, 1fr)); } }
.stat { border-top: 2px solid var(--color-accent); padding-top: var(--sp-2); }
.stat__value { font-family: var(--font-display); font-size: var(--fs-h2); font-weight: 800; }
.stat__label { color: var(--text-on-light-muted); font-size: 0.9rem; }

/* Asymmetric split */
.split { display: grid; gap: var(--sp-4); align-items: center; }
@media (min-width: 900px) {
  .split { grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr); gap: var(--sp-6); }
  .split--reverse { grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr); }
  .split--reverse > *:first-child { order: 2; }
}
/*
  Media-block: a "photography pending" slot, not a decorative box.
  Reads like a marked-up viewfinder frame (corner registration marks +
  grain + a tag) so an empty slot looks like an intentional placeholder
  for real shot-list photography, not a generic gradient rectangle.
*/
.media-block {
  --corner: 22px;
  --mark: var(--color-accent);
  aspect-ratio: 4/3;
  border-radius: var(--radius-md);
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: flex-end;
  color: var(--text-on-dark-muted);
  background-color: var(--color-ink);
  background-image:
    linear-gradient(var(--mark), var(--mark)),
    linear-gradient(var(--mark), var(--mark)),
    linear-gradient(var(--mark), var(--mark)),
    linear-gradient(var(--mark), var(--mark)),
    linear-gradient(var(--mark), var(--mark)),
    linear-gradient(var(--mark), var(--mark)),
    linear-gradient(var(--mark), var(--mark)),
    linear-gradient(var(--mark), var(--mark)),
    repeating-linear-gradient(115deg, rgba(255,255,255,0.05) 0 1px, transparent 1px 48px),
    radial-gradient(circle at 28% 22%, rgba(193,84,27,0.22), transparent 55%),
    linear-gradient(135deg, var(--color-concrete-900) 0%, var(--color-ink) 75%);
  background-repeat: no-repeat, no-repeat, no-repeat, no-repeat, no-repeat, no-repeat, no-repeat, no-repeat, repeat, no-repeat, no-repeat;
  background-position:
    left 14px top 14px, left 14px top 14px,
    right 14px top 14px, right 14px top 14px,
    left 14px bottom 14px, left 14px bottom 14px,
    right 14px bottom 14px, right 14px bottom 14px,
    0 0, 0 0, 0 0;
  background-size:
    var(--corner) 2px, 2px var(--corner),
    var(--corner) 2px, 2px var(--corner),
    var(--corner) 2px, 2px var(--corner),
    var(--corner) 2px, 2px var(--corner),
    auto, auto, auto;
  transition: transform var(--motion-base) var(--ease);
}
.media-block:hover { transform: translateY(-2px); }
.media-block::before {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.5;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-size: 120px 120px;
  pointer-events: none;
}
/* Alternate diagonal accent cut for asymmetry on every second block */
.media-block:nth-of-type(even) {
  clip-path: polygon(0 0, 100% 0, 100% 100%, 28px 100%, 0 calc(100% - 28px));
}
.media-block__label {
  position: relative;
  z-index: 1;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 14px;
  padding: 7px 12px 7px 10px;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-on-dark);
  background: rgba(21, 24, 27, 0.72);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 999px;
  backdrop-filter: blur(2px);
}
/* Photo-frame: same footprint/label as media-block, but holding a real photo */
.photo-frame {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-md);
  aspect-ratio: 4/3;
  display: flex;
  align-items: flex-end;
  background: var(--color-ink);
  transition: transform var(--motion-base) var(--ease);
}
.photo-frame:hover { transform: translateY(-2px); }
.photo-frame img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.photo-frame:nth-of-type(even) {
  clip-path: polygon(0 0, 100% 0, 100% 100%, 28px 100%, 0 calc(100% - 28px));
}
.media-block__label::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--color-accent);
  flex-shrink: 0;
}

/* Cards / grid */
.grid { display: grid; gap: var(--sp-3); }
.grid--3 { grid-template-columns: minmax(0, 1fr); }
@media (min-width: 700px) { .grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
.grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
@media (min-width: 800px) { .grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); } }

.card {
  background: var(--color-white);
  border: 1px solid var(--color-concrete-100);
  border-radius: var(--radius-md);
  padding: var(--sp-3);
  transition: transform var(--motion-base) var(--ease), box-shadow var(--motion-base) var(--ease);
}
.card:hover { transform: translateY(-4px); box-shadow: 0 20px 40px -24px rgba(21,24,27,0.35); }
.card--dark { background: var(--color-ink-soft); border-color: rgba(255,255,255,0.08); color: var(--text-on-dark); }
.card__title { font-size: var(--fs-h3); margin-bottom: var(--sp-1); }
.card__meta { font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--color-accent-ink); margin-bottom: var(--sp-1); }
.card--dark .card__meta { color: var(--color-accent); }

/* Product grid */
.product-toolbar { display: flex; flex-wrap: wrap; gap: var(--sp-2); align-items: center; justify-content: space-between; margin-bottom: var(--sp-4); }
.product-search { flex: 1; min-width: 220px; padding: 12px 16px; border: 1px solid var(--color-concrete-300); border-radius: var(--radius-sm); font-size: 0.95rem; }
.chip-row { display: flex; flex-wrap: wrap; gap: var(--sp-1); }
.chip {
  padding: 8px 14px; border-radius: 999px; border: 1px solid var(--color-concrete-300);
  background: var(--color-white); font-size: 0.82rem; font-weight: 600; color: var(--text-on-light-muted);
}
.chip.is-active { background: var(--color-ink); color: var(--text-on-dark); border-color: var(--color-ink); }
.product-card__unit { font-size: 0.8rem; color: var(--text-on-light-muted); }
.product-card__price { font-weight: 700; margin-top: var(--sp-1); }

/* FAQ */
.faq-item { border-bottom: 1px solid var(--color-concrete-300); }
.faq-item summary {
  cursor: pointer; padding: var(--sp-3) 0; font-weight: 700; font-size: 1.05rem;
  display: flex; justify-content: space-between; align-items: center; list-style: none;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; font-size: 1.4rem; color: var(--color-accent-ink); }
.faq-item[open] summary::after { content: "\2212"; }
.faq-item p { padding-bottom: var(--sp-3); color: var(--text-on-light-muted); max-width: 65ch; }

/* Testimonial */
.testimonial { max-width: 60ch; }
.testimonial blockquote { font-family: var(--font-display); font-size: var(--fs-h3); font-weight: 600; margin: 0 0 var(--sp-2); line-height: var(--lh-tight); }
.testimonial cite { font-style: normal; color: var(--text-on-dark-muted); }

/* Form */
.form-grid { display: grid; gap: var(--sp-2); }
@media (min-width: 700px) { .form-grid--2 { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); } }
.field { display: flex; flex-direction: column; gap: 6px; }
.field label { font-size: 0.85rem; font-weight: 700; }
.field input, .field select, .field textarea {
  padding: 12px 14px; border: 1px solid var(--color-concrete-300); border-radius: var(--radius-sm);
  font-family: inherit; font-size: 0.95rem; background: var(--color-white); color: var(--text-on-light);
}
.field--radio-row { flex-direction: row; align-items: center; gap: var(--sp-2); }
.form-note { font-size: 0.8rem; color: var(--text-on-light-muted); margin-top: var(--sp-1); }

/* Gallery */
.gallery-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--sp-2); }
@media (min-width: 700px) { .gallery-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); } }
.gallery-item { aspect-ratio: 1; border-radius: var(--radius-md); }

/* Map */
.map-frame {
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-concrete-300);
  filter: grayscale(0.15) contrast(1.05);
}
.map-frame iframe { display: block; }

/* Footer */
.site-footer { background: var(--color-ink); color: var(--text-on-dark-muted); padding-block: var(--sp-6) var(--sp-4); }
.footer-grid { display: grid; gap: var(--sp-4); grid-template-columns: minmax(0, 1fr); }
@media (min-width: 800px) { .footer-grid { grid-template-columns: 2fr repeat(3, minmax(0, 1fr)); } }
.footer-grid h4 { color: var(--text-on-dark); font-size: 0.85rem; letter-spacing: 0.06em; text-transform: uppercase; }
.footer-grid a { text-decoration: none; display: block; padding: 4px 0; font-size: 0.9rem; }
.footer-grid a:hover { color: var(--text-on-dark); }
.footer-bottom { display: flex; flex-wrap: wrap; justify-content: space-between; gap: var(--sp-2); margin-top: var(--sp-5); padding-top: var(--sp-3); border-top: 1px solid rgba(255,255,255,0.1); font-size: 0.8rem; }

/* Sticky mobile CTA bar */
.sticky-cta {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 60;
  display: flex; gap: 1px; background: rgba(255,255,255,0.1);
}
.sticky-cta a {
  flex: 1; text-align: center; padding: 14px 8px; font-weight: 700; font-size: 0.85rem; text-decoration: none;
}
.sticky-cta__call { background: var(--color-ink); color: var(--text-on-dark); }
.sticky-cta__whatsapp { background: #1f8a4c; color: #fff; }
@media (min-width: 960px) { .sticky-cta { display: none; } }
body { padding-bottom: 56px; }
@media (min-width: 960px) { body { padding-bottom: 0; } }

/* Utility */
.text-center { text-align: center; }
.mt-0 { margin-top: 0; }
.max-w-prose { max-width: 62ch; }
.section-head { max-width: 60ch; margin-bottom: var(--sp-5); }
.visually-hidden {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}
.skip-link {
  position: absolute; left: 8px; top: -60px; background: var(--color-ink); color: var(--color-accent);
  padding: 10px 16px; z-index: 100; transition: top var(--motion-fast) var(--ease);
}
.skip-link:focus { top: 8px; }