/* ── Design tokens ── */
:root {
  --gold-1: #b8860b;
  --gold-2: #d4af37;
  --gold-3: #f5e6a3;
  --gold-4: #aa771c;
  --gold-dark: #8b6914;
  --cream: #faf8f4;
  --cream-2: #f3efe8;
  --white: #ffffff;
  --text: #3d3428;
  --text-muted: #6b5f4f;
  --border-gold: rgba(212, 175, 55, 0.35);
  --glass: rgba(255, 255, 255, 0.72);
  --shadow: 0 8px 32px rgba(139, 105, 20, 0.08);
  --shadow-lg: 0 24px 64px rgba(139, 105, 20, 0.12);
  --radius: 16px;
  --header-h: 72px;
  --font: "Montserrat", "Noto Sans Thai", system-ui, sans-serif;
  --gold-gradient: linear-gradient(
    135deg,
    var(--gold-4) 0%,
    var(--gold-2) 25%,
    var(--gold-3) 50%,
    var(--gold-2) 75%,
    var(--gold-4) 100%
  );
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-h);
}

body {
  font-family: var(--font);
  background: var(--cream);
  color: var(--text);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* ── Accessibility / SEO helpers ── */
.skip-link {
  position: absolute;
  top: -100%;
  left: 16px;
  z-index: 10001;
  padding: 12px 20px;
  background: var(--gold-2);
  color: var(--white);
  font-weight: 600;
  text-decoration: none;
  border-radius: 0 0 8px 8px;
  transition: top 0.2s;
}

.skip-link:focus {
  top: 0;
  outline: 2px solid var(--gold-dark);
  outline-offset: 2px;
}

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

.container {
  width: min(1140px, calc(100% - 48px));
  margin-inline: auto;
}

/* ── Noise overlay ── */
.noise-overlay {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9999;
  opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-size: 128px 128px;
}

/* ── Gold text ── */
.gold-text {
  background: var(--gold-gradient);
  background-size: 200% auto;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: shimmer 6s linear infinite;
}

@keyframes shimmer {
  0% { background-position: 0% center; }
  100% { background-position: 200% center; }
}

/* ── Header ── */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-h);
  transition: background 0.4s, box-shadow 0.4s, backdrop-filter 0.4s;
}

.header.scrolled {
  background: rgba(250, 248, 244, 0.88);
  backdrop-filter: blur(16px);
  box-shadow: 0 1px 0 var(--border-gold);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--gold-2);
}

.logo-icon {
  width: 36px;
  height: 36px;
}

.logo-text {
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  background: var(--gold-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
  list-style: none;
}

.nav-links a {
  text-decoration: none;
  color: var(--text);
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  transition: color 0.25s;
  position: relative;
}

.nav-links a:not(.nav-cta)::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--gold-2);
  transition: width 0.3s;
}

.nav-links a:not(.nav-cta):hover {
  color: var(--gold-dark);
}

.nav-links a:not(.nav-cta):hover::after {
  width: 100%;
}

.nav-cta {
  padding: 10px 22px;
  border: 1.5px solid var(--gold-2);
  border-radius: 999px;
  color: var(--gold-dark) !important;
  transition: background 0.3s, color 0.3s, box-shadow 0.3s !important;
}

.nav-cta:hover {
  background: var(--gold-gradient);
  color: var(--white) !important;
  -webkit-text-fill-color: var(--white);
  box-shadow: 0 4px 20px rgba(212, 175, 55, 0.35);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--gold-2);
  transition: transform 0.3s, opacity 0.3s;
}

.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ── Hero ── */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: radial-gradient(ellipse at 50% 80%, rgba(212, 175, 55, 0.06) 0%, transparent 60%),
    linear-gradient(180deg, var(--cream) 0%, var(--cream-2) 100%);
}

#hero-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
}

.hero-waves {
  position: absolute;
  width: 280px;
  height: 280px;
  z-index: 0;
  opacity: 0.25;
  background: radial-gradient(circle, transparent 60%, var(--gold-2) 61%, transparent 62%),
    radial-gradient(circle, transparent 70%, var(--gold-2) 71%, transparent 72%),
    radial-gradient(circle, transparent 80%, var(--gold-2) 81%, transparent 82%);
  background-size: 100% 100%;
  mask-image: radial-gradient(ellipse, black 30%, transparent 70%);
}

.hero-waves--left { top: -60px; left: -80px; transform: rotate(-15deg); }
.hero-waves--right { top: -40px; right: -60px; transform: rotate(15deg) scaleX(-1); }

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding-top: var(--header-h);
}

.hero-eyebrow {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.35em;
  color: var(--gold-dark);
  margin-bottom: 16px;
}

.hero-title {
  font-size: clamp(4rem, 12vw, 8rem);
  font-weight: 800;
  letter-spacing: 0.08em;
  line-height: 1;
  margin-bottom: 20px;
}

.hero-subtitle {
  font-size: clamp(0.95rem, 2vw, 1.15rem);
  color: var(--text-muted);
  font-weight: 400;
  margin-bottom: 8px;
}

.hero-tagline {
  font-size: 0.85rem;
  font-style: italic;
  color: var(--gold-dark);
  letter-spacing: 0.15em;
  margin-bottom: 36px;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 32px;
  border-radius: 999px;
  font-family: var(--font);
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.25s, box-shadow 0.25s;
}

.btn:hover { transform: translateY(-2px); }

.btn-primary {
  background: var(--gold-gradient);
  background-size: 200% auto;
  color: var(--white);
  border: none;
  box-shadow: 0 4px 24px rgba(212, 175, 55, 0.4);
  animation: shimmer 4s linear infinite;
}

.btn-primary:hover {
  box-shadow: 0 8px 32px rgba(212, 175, 55, 0.5);
}

.btn-outline {
  background: transparent;
  color: var(--gold-dark);
  border: 1.5px solid var(--gold-2);
}

.btn-outline:hover {
  background: rgba(212, 175, 55, 0.08);
}

.scroll-indicator {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
}

.scroll-indicator span {
  display: block;
  width: 22px;
  height: 36px;
  border: 1.5px solid var(--gold-2);
  border-radius: 12px;
  position: relative;
}

.scroll-indicator span::after {
  content: "";
  position: absolute;
  top: 6px;
  left: 50%;
  transform: translateX(-50%);
  width: 3px;
  height: 8px;
  background: var(--gold-2);
  border-radius: 2px;
  animation: scroll-bounce 2s infinite;
}

@keyframes scroll-bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); opacity: 1; }
  50% { transform: translateX(-50%) translateY(10px); opacity: 0.3; }
}

/* ── Sections ── */
.section {
  padding: 100px 0;
  position: relative;
}

.section-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--gold-dark);
  margin-bottom: 12px;
}

.section-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  margin-bottom: 16px;
  letter-spacing: 0.02em;
}

.section-desc {
  color: var(--text-muted);
  max-width: 560px;
  margin-inline: auto;
}

.section-header {
  text-align: center;
  margin-bottom: 56px;
}

/* ── About ── */
.about {
  background: var(--white);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 64px;
  align-items: center;
}

.about-card {
  display: grid;
  gap: 24px;
  padding: 40px;
  background: var(--glass);
  border: 1px solid var(--border-gold);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(12px);
}

.about-stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-gold);
}

.about-stat:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.about-stat-num {
  font-size: 2.5rem;
  font-weight: 800;
  line-height: 1;
}

.about-stat-label {
  font-size: 0.875rem;
  color: var(--text-muted);
}

.about-text p {
  color: var(--text-muted);
  margin-bottom: 16px;
}

.about-quote {
  margin-top: 24px;
  padding: 20px 24px;
  border-left: 3px solid var(--gold-2);
  background: rgba(212, 175, 55, 0.06);
  border-radius: 0 var(--radius) var(--radius) 0;
  font-style: italic;
  color: var(--gold-dark);
  font-weight: 500;
}

/* ── Services ── */
.services {
  background: var(--cream);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.service-card {
  padding: 32px 28px;
  background: var(--white);
  border: 1px solid var(--border-gold);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition: transform 0.35s, box-shadow 0.35s, border-color 0.35s;
}

.service-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--gold-2);
}

.service-icon {
  width: 48px;
  height: 48px;
  margin-bottom: 20px;
  color: var(--gold-2);
}

.service-icon svg {
  width: 100%;
  height: 100%;
}

.service-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text);
}

.service-card p {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* ── Pricing ── */
.pricing {
  background: var(--white);
}

.pricing-table {
  border: 1px solid var(--border-gold);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.pricing-row {
  display: grid;
  grid-template-columns: 120px 1fr 48px 120px;
  align-items: center;
  gap: 24px;
  padding: 20px 28px;
  border-bottom: 1px solid var(--border-gold);
  transition: background 0.25s;
}

.pricing-row:last-child { border-bottom: none; }

.pricing-row:not(.pricing-header):hover {
  background: rgba(212, 175, 55, 0.04);
}

.pricing-header {
  background: rgba(212, 175, 55, 0.08);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gold-dark);
}

.material-name {
  font-weight: 700;
  font-size: 1rem;
  color: var(--text);
}

.material-desc {
  font-size: 0.875rem;
  color: var(--text-muted);
}

.material-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--gold-2);
}

.material-icon svg {
  width: 28px;
  height: 28px;
}

.material-price {
  font-size: 1.35rem;
  font-weight: 800;
  text-align: right;
}

.pricing-note {
  margin-top: 20px;
  font-size: 0.8rem;
  color: var(--text-muted);
  text-align: center;
}

/* ── Portfolio ── */
.portfolio {
  background: var(--cream);
}

.portfolio-materials {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
  max-width: 960px;
  margin-inline: auto;
}

.portfolio-materials.hidden {
  display: none;
}

.portfolio-material {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 28px 16px 24px;
  border: 1.5px solid var(--border-gold);
  border-radius: var(--radius);
  background: var(--white);
  font-family: var(--font);
  text-align: center;
  cursor: pointer;
  box-shadow: var(--shadow);
  transition: transform 0.35s, box-shadow 0.35s, border-color 0.35s, background 0.35s;
}

.portfolio-material:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--gold-2);
}

.portfolio-material.active {
  border-color: var(--gold-2);
  background: rgba(212, 175, 55, 0.06);
  box-shadow: 0 8px 32px rgba(212, 175, 55, 0.2);
}

.portfolio-material-name {
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.portfolio-material-desc {
  font-size: 0.75rem;
  color: var(--text-muted);
  line-height: 1.4;
}

.portfolio-material-action {
  margin-top: 4px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--gold-dark);
  opacity: 0;
  transform: translateY(4px);
  transition: opacity 0.3s, transform 0.3s;
}

.portfolio-material:hover .portfolio-material-action {
  opacity: 1;
  transform: translateY(0);
}

.portfolio-gallery.hidden {
  display: none;
}

.portfolio-gallery-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 28px;
  flex-wrap: wrap;
}

.portfolio-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 18px;
  border: 1.5px solid var(--border-gold);
  border-radius: 999px;
  background: var(--white);
  color: var(--gold-dark);
  font-family: var(--font);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.25s, border-color 0.25s, transform 0.25s;
}

.portfolio-back svg {
  width: 18px;
  height: 18px;
}

.portfolio-back:hover {
  border-color: var(--gold-2);
  background: rgba(212, 175, 55, 0.08);
  transform: translateX(-2px);
}

.portfolio-gallery-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text);
}

.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  transition: opacity 0.2s;
}

.portfolio-grid--fade {
  opacity: 0;
}

.portfolio-card {
  display: flex;
  flex-direction: column;
  background: var(--white);
  border: 1px solid var(--border-gold);
  border-radius: var(--radius);
  overflow: hidden;
  cursor: pointer;
  text-align: left;
  font-family: var(--font);
  box-shadow: var(--shadow);
  transition: transform 0.35s, box-shadow 0.35s, border-color 0.35s;
  animation: portfolio-in 0.5s ease both;
}

@keyframes portfolio-in {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.portfolio-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--gold-2);
}

.portfolio-card-img {
  position: relative;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: var(--cream-2);
}

.portfolio-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s;
}

.portfolio-card:hover .portfolio-card-img img {
  transform: scale(1.06);
}

.portfolio-card-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(61, 52, 40, 0.35);
  opacity: 0;
  transition: opacity 0.3s;
}

.portfolio-card-overlay svg {
  width: 32px;
  height: 32px;
  color: var(--white);
}

.portfolio-card:hover .portfolio-card-overlay {
  opacity: 1;
}

.portfolio-card-body {
  padding: 16px 20px 20px;
}

.portfolio-card-badge {
  display: inline-block;
  padding: 3px 10px;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--gold-dark);
  background: rgba(212, 175, 55, 0.12);
  border: 1px solid var(--border-gold);
  border-radius: 999px;
  margin-bottom: 8px;
}

.portfolio-card-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
}

.portfolio-empty {
  text-align: center;
  color: var(--text-muted);
  padding: 48px 0;
}

.portfolio-empty.hidden {
  display: none;
}

/* ── Lightbox ── */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 10000;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(30, 25, 18, 0.88);
  backdrop-filter: blur(8px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.35s;
  padding: 24px;
}

.lightbox.open {
  opacity: 1;
  pointer-events: all;
}

.lightbox-content {
  max-width: 900px;
  width: 100%;
  animation: lightbox-in 0.35s ease;
}

@keyframes lightbox-in {
  from { opacity: 0; transform: scale(0.95); }
  to { opacity: 1; transform: scale(1); }
}

.lightbox-img {
  width: 100%;
  max-height: 70vh;
  object-fit: contain;
  border-radius: var(--radius);
  border: 1px solid var(--border-gold);
  background: var(--cream);
}

.lightbox-info {
  text-align: center;
  margin-top: 16px;
}

.lightbox-badge {
  display: inline-block;
  padding: 4px 14px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--gold-3);
  background: rgba(212, 175, 55, 0.2);
  border: 1px solid rgba(212, 175, 55, 0.4);
  border-radius: 999px;
  margin-bottom: 8px;
}

.lightbox-title {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--white);
}

.lightbox-close {
  position: absolute;
  top: 20px;
  right: 24px;
  width: 44px;
  height: 44px;
  border: 1px solid rgba(212, 175, 55, 0.4);
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  color: var(--white);
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
  transition: background 0.25s, border-color 0.25s;
}

.lightbox-close:hover {
  background: rgba(212, 175, 55, 0.25);
  border-color: var(--gold-2);
}

.lightbox-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 48px;
  height: 48px;
  border: 1px solid rgba(212, 175, 55, 0.4);
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  color: var(--white);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.25s, border-color 0.25s;
}

.lightbox-nav svg {
  width: 22px;
  height: 22px;
}

.lightbox-nav:hover {
  background: rgba(212, 175, 55, 0.25);
  border-color: var(--gold-2);
}

.lightbox-prev { left: 20px; }
.lightbox-next { right: 20px; }

/* ── Features ── */
.features {
  background: var(--cream);
}

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

.feature-item {
  padding: 32px 24px;
  background: var(--white);
  border: 1px solid var(--border-gold);
  border-radius: var(--radius);
  text-align: center;
  transition: transform 0.3s;
}

.feature-item:hover { transform: translateY(-4px); }

.feature-num {
  font-size: 2rem;
  font-weight: 800;
  background: var(--gold-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  opacity: 0.5;
  margin-bottom: 12px;
}

.feature-item h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.feature-item p {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ── Contact ── */
.contact {
  background: var(--white);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 64px;
  align-items: center;
}

.contact-text p {
  color: var(--text-muted);
  margin-top: 12px;
}

.contact-cards {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.contact-card {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 24px 28px;
  background: var(--cream);
  border: 1px solid var(--border-gold);
  border-radius: var(--radius);
  text-decoration: none;
  color: inherit;
  transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
}

.contact-card:hover {
  transform: translateX(6px);
  box-shadow: var(--shadow);
  border-color: var(--gold-2);
}

.contact-card svg {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
  color: var(--gold-2);
}

.contact-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.contact-value {
  font-size: 1.1rem;
  font-weight: 700;
}

/* ── Footer ── */
.footer {
  background: var(--cream-2);
  border-top: 1px solid var(--border-gold);
  padding: 40px 0;
}

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

.footer-brand p {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 4px;
}

.footer-copy {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ── Scroll reveal ── */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── Responsive ── */
@media (max-width: 1024px) {
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .portfolio-grid { grid-template-columns: repeat(2, 1fr); }
  .portfolio-materials { grid-template-columns: repeat(3, 1fr); }
  .about-grid,
  .contact-grid { grid-template-columns: 1fr; gap: 40px; }
}

@media (max-width: 768px) {
  .nav-toggle { display: flex; }

  .nav-links {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    background: rgba(250, 248, 244, 0.97);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-gold);
    padding: 16px 0;
    transform: translateY(-110%);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.35s, opacity 0.35s;
  }

  .nav-links.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: all;
  }

  .nav-links li { width: 100%; }

  .nav-links a {
    display: block;
    padding: 14px 24px;
    text-align: center;
  }

  .nav-cta { margin: 8px 24px 0; display: block !important; text-align: center; }

  .services-grid { grid-template-columns: 1fr; }
  .features-grid { grid-template-columns: 1fr; }
  .portfolio-grid { grid-template-columns: 1fr; }

  .portfolio-materials { grid-template-columns: 1fr; max-width: 320px; }
  .portfolio-material { padding: 22px 12px 18px; }
  .portfolio-material-name { font-size: 1.25rem; }
  .portfolio-material-action { opacity: 1; transform: none; }

  .lightbox-prev { left: 8px; }
  .lightbox-next { right: 8px; }
  .lightbox-nav { width: 40px; height: 40px; }

  .pricing-row {
    grid-template-columns: 1fr auto;
    grid-template-rows: auto auto;
    gap: 8px 16px;
  }

  .pricing-header { display: none; }

  .material-name { grid-column: 1; }
  .material-desc { grid-column: 1 / -1; font-size: 0.8rem; }
  .material-icon { grid-column: 2; grid-row: 1; }
  .material-price { grid-column: 2; grid-row: 1; align-self: start; }

  .section { padding: 72px 0; }
  .footer-inner { flex-direction: column; text-align: center; }
}