/* ==========================================================================
   ПЕРЛИНА — brand stylesheet
   Срібло та золото від українських ювелірних фабрик.
   ========================================================================== */

:root {
  --color-bg: #faf8f5;
  --color-bg-alt: #f0ece5;
  --color-surface: #ffffff;
  --color-border: #e2dcd0;

  --color-ink: #16140f;
  --color-stone: #8a8378;
  --color-stone-light: #4a453c;
  --color-gold: #b68a46;
  --color-gold-light: #e0bc7d;
  --color-silver: #9ea3a8;
  --color-silver-light: #d6dadd;

  --color-text: #2f2b24;
  --color-text-muted: #7a7468;

  --color-dark: #0b0a08;
  --color-dark-alt: #18160f;
  --dark-text: #f4f1ea;
  --dark-muted: #a39d8e;
  --dark-border: rgba(255, 255, 255, 0.1);

  --font-display: "Cinzel", "Georgia", serif;
  --font-body: "Manrope", "Helvetica Neue", Arial, sans-serif;

  --container: 1240px;
  --radius-sm: 6px;
  --radius: 14px;
  --radius-lg: 24px;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --transition: 0.4s var(--ease);
  --transition-fast: 0.2s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

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

button {
  font-family: inherit;
  cursor: pointer;
}

ul {
  list-style: none;
}

h1, h2, h3 {
  font-family: var(--font-display);
  line-height: 1.15;
  font-weight: 600;
  letter-spacing: 0.01em;
}

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

section {
  padding: 100px 0;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 0.76rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-gold);
  font-weight: 600;
  margin-bottom: 18px;
}

.eyebrow::before {
  content: "";
  width: 28px;
  height: 1px;
  background: var(--color-gold);
}

.eyebrow.center {
  justify-content: center;
}

.section-title {
  font-size: clamp(1.9rem, 3.2vw, 2.6rem);
  margin-bottom: 18px;
}

.section-sub {
  color: var(--color-text-muted);
  max-width: 560px;
  font-size: 1.02rem;
}

.center {
  text-align: center;
  margin-left: auto;
  margin-right: auto;
}

/* ---------- Reveal animation ---------- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
}

.reveal.in-view {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

@media (prefers-reduced-motion: reduce) {
  .reveal, .reveal.in-view {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
  html { scroll-behavior: auto; }
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 15px 34px;
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  border: 1px solid var(--color-stone);
  color: var(--color-ink);
  background: transparent;
  border-radius: var(--radius-sm);
  transition: background var(--transition-fast), color var(--transition-fast),
    border-color var(--transition-fast), transform var(--transition-fast),
    box-shadow var(--transition-fast);
}

.btn:hover {
  background: var(--color-ink);
  border-color: var(--color-ink);
  color: #f7f6f3;
  transform: translateY(-2px);
}

.btn-gold {
  background: linear-gradient(135deg, var(--color-gold-light), var(--color-gold));
  border-color: transparent;
  color: #1a1408;
  box-shadow: 0 14px 34px -12px rgba(182, 138, 70, 0.5);
}

.btn-gold:hover {
  background: linear-gradient(135deg, #ecd19c, #c69a53);
  box-shadow: 0 18px 44px -10px rgba(220, 185, 107, 0.6);
  transform: translateY(-2px);
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(250, 248, 245, 0.85);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow var(--transition-fast), padding var(--transition-fast);
}

.site-header.scrolled {
  box-shadow: 0 12px 32px -18px rgba(10, 10, 8, 0.35);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px 24px;
  max-width: var(--container);
  margin: 0 auto;
  transition: padding var(--transition-fast);
}

.site-header.scrolled .nav {
  padding: 15px 24px;
}

.logo {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  font-family: var(--font-display);
  font-size: 1.5rem;
  letter-spacing: 0.06em;
  color: var(--color-ink);
}

.logo .logo-sub {
  font-family: var(--font-body);
  font-size: 0.6rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--color-gold);
  font-weight: 600;
}

.nav-links {
  display: flex;
  gap: 40px;
}

.nav-links a {
  font-size: 0.76rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

.nav-links a:hover {
  color: var(--color-ink);
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: 200px 0 140px;
  background:
    radial-gradient(ellipse 700px 500px at 15% 20%, rgba(182, 138, 70, 0.16), transparent 60%),
    radial-gradient(ellipse 600px 500px at 85% 80%, rgba(158, 163, 168, 0.14), transparent 60%),
    linear-gradient(180deg, var(--color-dark) 0%, var(--color-dark-alt) 100%);
  color: var(--dark-text);
  overflow: hidden;
}

.hero-ring {
  position: absolute;
  border: 1px solid rgba(182, 138, 70, 0.3);
  border-radius: 50%;
  animation: orbFloat 18s ease-in-out infinite;
}

.hero-ring.r1 { width: 440px; height: 440px; top: -140px; right: -140px; }
.hero-ring.r2 { width: 640px; height: 640px; bottom: -280px; left: -220px; animation-delay: -7s; border-color: rgba(158, 163, 168, 0.25); }

@keyframes orbFloat {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(18px, -20px) scale(1.03); }
}

.hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  text-align: center;
  justify-items: center;
}

.hero-content h1 {
  font-size: clamp(2.4rem, 5.2vw, 4.2rem);
  color: var(--dark-text);
  margin: 18px 0 22px;
  max-width: 820px;
}

.hero-content p {
  color: var(--dark-muted);
  max-width: 600px;
  font-size: 1.06rem;
  margin: 0 auto 36px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.hero .btn:not(.btn-gold) {
  border-color: rgba(244, 241, 234, 0.3);
  color: var(--dark-text);
}

.hero .btn:not(.btn-gold):hover {
  background: var(--dark-text);
  color: var(--color-ink);
}

/* ---------- Materials strip ---------- */
.materials-strip {
  background: var(--color-bg-alt);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  padding: 28px 0;
}

.materials-strip .container {
  display: flex;
  justify-content: center;
  gap: 48px;
  flex-wrap: wrap;
}

.materials-strip .item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.materials-strip .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.materials-strip .dot.gold {
  background: linear-gradient(135deg, var(--color-gold-light), var(--color-gold));
}

.materials-strip .dot.silver {
  background: linear-gradient(135deg, var(--color-silver-light), var(--color-silver));
}

/* ---------- About / trust ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.about-grid p {
  color: var(--color-text-muted);
  margin-bottom: 18px;
  font-size: 1.02rem;
}

.about-grid .signature {
  font-family: var(--font-display);
  color: var(--color-gold);
  margin-top: 24px;
}

.advantages {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-top: 20px;
}

/* ---------- Store / map ---------- */
.store-address {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 6px;
  font-size: 1rem;
  color: var(--color-text);
  font-weight: 600;
}

.store-address svg {
  width: 22px;
  height: 22px;
  flex-shrink: 0;
  color: var(--color-gold);
}

.store-cta {
  margin-top: 28px;
}

.map-frame {
  aspect-ratio: 4 / 5;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
}

.map-frame iframe {
  display: block;
}

.advantage-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 30px 26px;
}

.advantage-card .icon {
  width: 42px;
  height: 42px;
  margin-bottom: 18px;
  color: var(--color-gold);
}

.advantage-card h3 {
  font-size: 1.08rem;
  margin-bottom: 10px;
}

.advantage-card p {
  color: var(--color-text-muted);
  font-size: 0.94rem;
}

/* ---------- Catalog filters ---------- */
.filters {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
  margin: 36px 0 48px;
}

.filter-btn {
  padding: 11px 22px;
  font-size: 0.74rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: var(--color-surface);
  color: var(--color-text-muted);
  transition: background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
}

.filter-btn:hover {
  border-color: var(--color-gold);
  color: var(--color-ink);
}

.filter-btn.active {
  background: var(--color-ink);
  border-color: var(--color-ink);
  color: #f7f6f3;
}

/* ---------- Product grid ---------- */
.product-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.product-card {
  display: block;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.product-card.is-hidden {
  display: none;
}

.product-card:hover {
  transform: translateY(-8px);
  border-color: var(--color-gold);
  box-shadow: 0 30px 60px -30px rgba(10, 10, 8, 0.35);
}

.product-media {
  aspect-ratio: 1 / 1;
  background:
    radial-gradient(ellipse at 30% 25%, #3d392e, transparent 55%),
    linear-gradient(150deg, #322e24, #14120d 65%, #262319);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.product-media svg {
  width: 44%;
  color: var(--color-gold-light);
  opacity: 0.9;
}

.product-media.is-silver svg {
  color: var(--color-silver-light);
}

.material-tag {
  position: absolute;
  top: 12px;
  left: 12px;
  font-size: 0.6rem;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  padding: 5px 10px;
  background: rgba(11, 10, 8, 0.7);
  border: 1px solid var(--color-gold);
  color: var(--color-gold-light);
  border-radius: 999px;
}

.material-tag.silver {
  border-color: var(--color-silver);
  color: var(--color-silver-light);
}

.product-info {
  padding: 18px 18px 22px;
}

.product-info h3 {
  font-size: 1rem;
  margin-bottom: 6px;
  font-weight: 600;
}

.product-info .factory {
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
  margin-bottom: 10px;
}

.product-info .price {
  color: var(--color-gold);
  font-size: 1.02rem;
  font-family: var(--font-display);
  font-weight: 600;
}

/* ---------- CTA band ---------- */
.cta-band {
  position: relative;
  background:
    radial-gradient(ellipse 600px 400px at 20% 30%, rgba(182, 138, 70, 0.2), transparent 60%),
    radial-gradient(ellipse 500px 400px at 85% 75%, rgba(158, 163, 168, 0.14), transparent 60%),
    linear-gradient(180deg, var(--color-dark) 0%, var(--color-dark-alt) 100%);
  border-top: 1px solid var(--dark-border);
  border-bottom: 1px solid var(--dark-border);
  text-align: center;
  color: var(--dark-text);
  overflow: hidden;
}

.cta-band h2 {
  font-size: clamp(1.9rem, 3.4vw, 2.9rem);
  max-width: 720px;
  margin: 0 auto 36px;
  color: var(--dark-text);
}

.cta-band .socials {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-top: 32px;
}

.cta-band .socials a {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid rgba(244, 241, 234, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--dark-text);
  transition: border-color var(--transition-fast), background var(--transition-fast);
}

.cta-band .socials a:hover {
  border-color: var(--color-gold);
  background: rgba(182, 138, 70, 0.12);
}

.cta-band .socials svg {
  width: 19px;
  height: 19px;
}

/* ---------- Footer ---------- */
.site-footer {
  background: var(--color-dark);
  color: var(--dark-muted);
  padding: 40px 0;
  font-size: 0.85rem;
}

.footer-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
  padding-bottom: 24px;
}

.footer-row .logo {
  color: var(--dark-text);
}

.footer-contacts {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}

.footer-contacts a {
  color: var(--dark-muted);
  transition: color var(--transition-fast);
}

.footer-contacts a:hover {
  color: var(--color-gold-light);
}

.footer-bottom {
  border-top: 1px solid var(--dark-border);
  padding-top: 20px;
  font-size: 0.78rem;
  color: var(--dark-muted);
}

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  .about-grid { grid-template-columns: 1fr; gap: 40px; }
  .advantages { grid-template-columns: 1fr; }
  .product-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 720px) {
  .nav {
    flex-wrap: wrap;
    row-gap: 16px;
  }

  .nav-links {
    order: 3;
    flex-basis: 100%;
    justify-content: center;
    flex-wrap: wrap;
    gap: 20px;
  }

  section { padding: 72px 0; }
  .hero { padding: 160px 0 100px; }
  .product-grid { grid-template-columns: 1fr; }
  .footer-row { flex-direction: column; align-items: flex-start; }
}