/* =========================================================
   ALKIMIA — Base Layout & Typography
   ========================================================= */

/* ---- Utility Layout ---- */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.container--narrow {
  max-width: 900px;
}

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

.section {
  padding-block: var(--section-gap);
  position: relative;
}

.section--dark {
  background-color: var(--c-bg);
}

.section--alt {
  background-color: var(--c-bg-alt);
}

.section--surface {
  background-color: var(--c-surface);
}

/* ---- Grid Systems ---- */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--col-gap);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--col-gap);
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--col-gap);
}

/* ---- Typography ---- */
.label {
  font-family: var(--font-body);
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  letter-spacing: var(--ls-widest);
  text-transform: uppercase;
  color: var(--c-gold);
  display: flex;
  align-items: center;
  gap: var(--sp-3);
}

.label::before {
  content: '';
  display: block;
  width: 24px;
  height: 1px;
  background: var(--c-gold);
  flex-shrink: 0;
}

.heading-xl {
  font-family: var(--font-display);
  font-size: clamp(var(--fs-3xl), 6vw, var(--fs-6xl));
  font-weight: var(--fw-light);
  letter-spacing: var(--ls-tight);
  line-height: 1.0;
}

.heading-lg {
  font-family: var(--font-display);
  font-size: clamp(var(--fs-2xl), 4vw, var(--fs-5xl));
  font-weight: var(--fw-light);
  letter-spacing: var(--ls-snug);
  line-height: 1.05;
}

.heading-md {
  font-family: var(--font-display);
  font-size: clamp(var(--fs-xl), 3vw, var(--fs-3xl));
  font-weight: var(--fw-light);
  letter-spacing: var(--ls-snug);
  line-height: var(--lh-snug);
}

.heading-sm {
  font-family: var(--font-display);
  font-size: clamp(var(--fs-lg), 2vw, var(--fs-2xl));
  font-weight: var(--fw-light);
  line-height: var(--lh-snug);
}

.text-gold { color: var(--c-gold); }
.text-muted { color: var(--c-text-muted); }
.text-soft { color: var(--c-text-soft); }

.italic { font-style: italic; }

/* ---- Divider ---- */
.divider {
  width: 100%;
  height: 1px;
  background: var(--c-border);
}

.divider--gold {
  background: linear-gradient(90deg, transparent, var(--c-gold), transparent);
  opacity: 0.4;
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-3);
  padding: var(--sp-4) var(--sp-8);
  font-family: var(--font-body);
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  letter-spacing: var(--ls-wider);
  text-transform: uppercase;
  transition: all var(--dur-base) var(--ease-out);
  position: relative;
  overflow: hidden;
  white-space: nowrap;
}

.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity var(--dur-base) var(--ease);
}

.btn:hover::after { opacity: 1; }

.btn--primary {
  background: var(--c-gold);
  color: var(--c-bg);
  border: 1px solid var(--c-gold);
}

.btn--primary::after {
  background: rgba(255,255,255,0.12);
}

.btn--primary:hover {
  box-shadow: 0 4px 24px rgba(196, 148, 59, 0.4);
  transform: translateY(-1px);
}

.btn--outline {
  background: transparent;
  color: var(--c-text);
  border: 1px solid var(--c-border);
}

.btn--outline::after {
  background: rgba(255,255,255,0.04);
}

.btn--outline:hover {
  border-color: var(--c-gold);
  color: var(--c-gold);
}

.btn--ghost {
  background: transparent;
  color: var(--c-gold);
  border: none;
  padding-inline: 0;
  gap: var(--sp-4);
}

.btn--ghost .btn-arrow {
  width: 32px;
  height: 1px;
  background: var(--c-gold);
  position: relative;
  transition: width var(--dur-base) var(--ease-out);
}

.btn--ghost .btn-arrow::after {
  content: '';
  position: absolute;
  right: 0;
  top: -3px;
  width: 7px;
  height: 7px;
  border-right: 1px solid var(--c-gold);
  border-top: 1px solid var(--c-gold);
  transform: rotate(45deg);
}

.btn--ghost:hover .btn-arrow {
  width: 48px;
}

/* ---- Gold accent line ---- */
.accent-line {
  width: 40px;
  height: 1px;
  background: var(--c-gold);
  opacity: 0.6;
}

/* ---- Image wrapper ---- */
.img-wrap {
  overflow: hidden;
  position: relative;
}

.img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--dur-slower) var(--ease-out);
}

.img-wrap:hover img {
  transform: scale(1.04);
}

/* ---- Number badge ---- */
.num-badge {
  font-family: var(--font-display);
  font-size: var(--fs-xs);
  color: var(--c-text-muted);
  font-style: italic;
}

/* ---- Section header ---- */
.section-header {
  display: flex;
  flex-direction: column;
  gap: var(--sp-6);
  margin-bottom: clamp(var(--sp-12), 6vw, var(--sp-24));
}

.section-header--center {
  align-items: center;
  text-align: center;
}

.section-header p {
  color: var(--c-text-soft);
  font-size: var(--fs-md);
  font-weight: var(--fw-light);
  line-height: var(--lh-loose);
  max-width: 58ch;
}

/* ---- Horizontal rule ---- */
hr {
  border: none;
  border-top: 1px solid var(--c-border);
}

/* ---- Noise texture overlay ---- */
.noise-overlay {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: var(--z-top);
  opacity: 0.025;
  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='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
  background-repeat: repeat;
  background-size: 256px 256px;
}

/* ---- Custom scrollbar ---- */
::-webkit-scrollbar {
  width: 4px;
}
::-webkit-scrollbar-track {
  background: var(--c-bg);
}
::-webkit-scrollbar-thumb {
  background: var(--c-text-faint);
  border-radius: 2px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--c-gold);
}

/* ---- Loading screen ---- */
#loading-screen {
  position: fixed;
  inset: 0;
  background: var(--c-bg);
  z-index: var(--z-top);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity var(--dur-slow) var(--ease), visibility var(--dur-slow) var(--ease);
}

#loading-screen.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.loading-logo {
  font-family: var(--font-display);
  font-size: var(--fs-2xl);
  font-weight: var(--fw-light);
  letter-spacing: var(--ls-widest);
  color: var(--c-gold);
  animation: pulse-gold 1.6s ease-in-out infinite;
}

@keyframes pulse-gold {
  0%, 100% { opacity: 0.3; }
  50% { opacity: 1; }
}