/* AF Studio — Premium Glass Catalog Prototype */

:root {
  --bg-primary: #3A3330;
  --bg-secondary: #4A423E;
  --bg-elevated: #564E4A;
  --bg-light: #f5f3f0;
  --text-primary: #ffffff;
  --text-muted: #a39a94;
  --text-dark: #2E2825;
  --overlay-rgb: 58, 51, 48;
  --accent: #c45a2e;
  --accent-hover: #d4703f;
  --metal: #b8b8b8;
  --glass: rgba(255, 255, 255, 0.06);
  --nav-height: 52px;
  --font-sans: "Inter", system-ui, -apple-system, sans-serif;
  --font-serif: "Cormorant Garamond", "Times New Roman", serif;
  --transition: 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

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

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

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

/* ── Navigation ── */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 clamp(20px, 4vw, 48px);
  background: rgba(var(--overlay-rgb), 0.72);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  transition: background var(--transition);
}

.nav--scrolled {
  background: rgba(var(--overlay-rgb), 0.92);
}

.nav__logo {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: clamp(20px, 3vw, 40px);
  list-style: none;
}

.nav__links a {
  font-size: 0.8125rem;
  font-weight: 400;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  transition: color 0.25s;
}

.nav__links a:hover,
.nav__links a.active {
  color: var(--text-primary);
}

.nav__phone {
  font-size: 0.8125rem;
  color: var(--text-primary);
  white-space: nowrap;
}

.nav__burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
}

.nav__burger span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--text-primary);
  transition: transform 0.3s, opacity 0.3s;
}

.nav__burger.open span:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}

.nav__burger.open span:nth-child(2) {
  opacity: 0;
}

.nav__burger.open span:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

.nav__mobile {
  display: none;
  position: fixed;
  inset: var(--nav-height) 0 0 0;
  background: rgba(var(--overlay-rgb), 0.97);
  backdrop-filter: blur(24px);
  padding: 32px clamp(20px, 4vw, 48px);
  flex-direction: column;
  gap: 24px;
  z-index: 999;
}

.nav__mobile.open {
  display: flex;
}

.nav__mobile a {
  font-family: var(--font-serif);
  font-size: 1.75rem;
  font-weight: 400;
  color: var(--text-primary);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  padding-bottom: 16px;
}

/* ── Hero ── */

.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  align-items: flex-end;
  padding: calc(var(--nav-height) + 48px) clamp(20px, 5vw, 80px) clamp(48px, 8vh, 96px);
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to top,
    rgba(var(--overlay-rgb), 0.95) 0%,
    rgba(var(--overlay-rgb), 0.4) 40%,
    rgba(var(--overlay-rgb), 0.2) 100%
  );
}

.hero__content {
  position: relative;
  z-index: 1;
  max-width: 720px;
}

.hero__label {
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 16px;
}

.hero__title {
  font-family: var(--font-serif);
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 400;
  line-height: 1.1;
  margin-bottom: 24px;
}

.hero__subtitle {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--text-muted);
  max-width: 480px;
  margin-bottom: 40px;
  line-height: 1.6;
}

/* ── Buttons ── */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 32px;
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border-radius: 0;
  transition: all 0.3s;
}

.btn--primary {
  background: var(--accent);
  color: var(--text-primary);
}

.btn--primary:hover {
  background: var(--accent-hover);
}

.btn--outline {
  border: 1px solid rgba(255, 255, 255, 0.3);
  color: var(--text-primary);
}

.btn--outline:hover {
  border-color: var(--text-primary);
  background: rgba(255, 255, 255, 0.05);
}

.btn__arrow {
  transition: transform 0.3s;
}

.btn:hover .btn__arrow {
  transform: translateX(4px);
}

/* ── Category blocks (full-screen) ── */

.catalog-section {
  scroll-snap-type: y mandatory;
}

.category-block {
  position: relative;
  min-height: 100vh;
  min-height: 100dvh;
  scroll-snap-align: start;
  display: flex;
  align-items: flex-end;
  overflow: hidden;
  cursor: pointer;
}

.category-block__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  transition: transform 0.8s var(--transition);
}

.category-block:hover .category-block__bg {
  transform: scale(1.03);
}

.category-block__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.category-block__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to top,
    rgba(var(--overlay-rgb), 0.92) 0%,
    rgba(var(--overlay-rgb), 0.3) 50%,
    rgba(var(--overlay-rgb), 0.15) 100%
  );
  transition: background var(--transition);
}

.category-block:hover .category-block__overlay {
  background: linear-gradient(
    to top,
    rgba(var(--overlay-rgb), 0.95) 0%,
    rgba(var(--overlay-rgb), 0.45) 60%,
    rgba(var(--overlay-rgb), 0.25) 100%
  );
}

.category-block__content {
  position: relative;
  z-index: 1;
  padding: clamp(32px, 6vh, 80px) clamp(20px, 5vw, 80px);
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 24px;
}

.category-block__text h2 {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 4vw, 3.5rem);
  font-weight: 400;
  margin-bottom: 12px;
}

.category-block__text p {
  font-size: 0.9375rem;
  color: var(--text-muted);
  max-width: 400px;
}

.category-block__arrow {
  flex-shrink: 0;
  width: 56px;
  height: 56px;
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  transition: all 0.3s;
}

.category-block:hover .category-block__arrow {
  border-color: var(--accent);
  background: var(--accent);
  transform: translateX(4px);
}

/* ── Featured project strip ── */

.featured {
  padding: clamp(64px, 10vh, 120px) clamp(20px, 5vw, 80px);
  background: var(--bg-secondary);
}

.featured__header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 48px;
  gap: 24px;
  flex-wrap: wrap;
}

.featured__label {
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 8px;
}

.featured__title {
  font-family: var(--font-serif);
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 400;
}

.featured__card {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 0;
  background: var(--bg-elevated);
  overflow: hidden;
  transition: transform 0.4s;
}

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

.featured__image {
  aspect-ratio: 16 / 10;
  overflow: hidden;
}

.featured__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s;
}

.featured__card:hover .featured__image img {
  transform: scale(1.04);
}

.featured__body {
  padding: clamp(32px, 4vw, 56px);
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.featured__name {
  font-family: var(--font-serif);
  font-size: clamp(1.5rem, 2.5vw, 2rem);
  margin-bottom: 16px;
}

.featured__desc {
  color: var(--text-muted);
  font-size: 0.9375rem;
  line-height: 1.7;
  margin-bottom: 32px;
}

.featured__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 32px;
}

.tag {
  font-size: 0.6875rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 6px 14px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: var(--text-muted);
}

/* ── Process section ── */

.process {
  padding: clamp(64px, 10vh, 120px) clamp(20px, 5vw, 80px);
  background: var(--bg-primary);
}

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

.section-header__label {
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 8px;
}

.section-header__title {
  font-family: var(--font-serif);
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 400;
}

.process__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}

.process__step {
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.process__num {
  font-family: var(--font-serif);
  font-size: 2rem;
  color: var(--accent);
  margin-bottom: 16px;
  opacity: 0.6;
}

.process__step h3 {
  font-size: 1rem;
  font-weight: 500;
  margin-bottom: 12px;
}

.process__step p {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ── Footer ── */

.footer {
  padding: clamp(48px, 8vh, 80px) clamp(20px, 5vw, 80px);
  background: var(--bg-secondary);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer__brand {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.footer__tagline {
  color: var(--text-muted);
  font-size: 0.875rem;
  max-width: 280px;
  line-height: 1.6;
}

.footer__col h4 {
  font-size: 0.6875rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.footer__col a,
.footer__col p {
  display: block;
  font-size: 0.875rem;
  color: var(--text-primary);
  margin-bottom: 8px;
  transition: color 0.25s;
}

.footer__col a:hover {
  color: var(--accent);
}

.footer__bottom {
  padding-top: 32px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.footer__bottom p {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* ── Page header (inner pages) ── */

.page-hero {
  position: relative;
  min-height: 60vh;
  display: flex;
  align-items: flex-end;
  padding: calc(var(--nav-height) + 48px) clamp(20px, 5vw, 80px) clamp(48px, 6vh, 72px);
  overflow: hidden;
}

.page-hero--short {
  min-height: 45vh;
}

.page-hero__bg {
  position: absolute;
  inset: 0;
}

.page-hero__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(var(--overlay-rgb), 0.95), rgba(var(--overlay-rgb), 0.35));
}

.page-hero__content {
  position: relative;
  z-index: 1;
}

.breadcrumb {
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.breadcrumb a {
  transition: color 0.25s;
}

.breadcrumb a:hover {
  color: var(--accent);
}

.breadcrumb span {
  margin: 0 8px;
  opacity: 0.4;
}

.page-hero__title {
  font-family: var(--font-serif);
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 400;
  margin-bottom: 12px;
}

.page-hero__subtitle {
  font-size: 1.0625rem;
  color: var(--text-muted);
  max-width: 560px;
}

/* ── Category page grid ── */

.category-content {
  padding: clamp(48px, 8vh, 80px) clamp(20px, 5vw, 80px);
}

.category-content__intro {
  max-width: 640px;
  margin-bottom: 56px;
}

.category-content__intro p {
  color: var(--text-muted);
  font-size: 1.0625rem;
  line-height: 1.7;
}

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

.product-card {
  background: var(--bg-secondary);
  overflow: hidden;
  transition: transform 0.3s;
}

.product-card:hover {
  transform: translateY(-4px);
}

.product-card__image {
  aspect-ratio: 4 / 5;
  overflow: hidden;
}

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

.product-card:hover .product-card__image img {
  transform: scale(1.05);
}

.product-card__body {
  padding: 24px;
}

.product-card__body h3 {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 400;
  margin-bottom: 8px;
}

.product-card__body p {
  font-size: 0.8125rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ── Project page ── */

.project-intro {
  padding: clamp(48px, 8vh, 80px) clamp(20px, 5vw, 80px);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(32px, 6vw, 80px);
  align-items: start;
}

.project-intro__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  margin-bottom: 32px;
}

.project-intro__meta-item {
  font-size: 0.8125rem;
}

.project-intro__meta-item span {
  display: block;
  color: var(--text-muted);
  font-size: 0.6875rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 4px;
}

.project-intro__text p {
  color: var(--text-muted);
  font-size: 1rem;
  line-height: 1.8;
  margin-bottom: 20px;
}

.project-intro__list h3 {
  font-size: 0.6875rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.project-intro__list ul {
  list-style: none;
}

.project-intro__list li {
  padding: 12px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 0.9375rem;
}

.project-intro__list li::before {
  content: "—";
  color: var(--accent);
  margin-right: 12px;
}

.project-gallery {
  padding: 0 clamp(20px, 5vw, 80px) clamp(64px, 10vh, 100px);
}

.project-gallery__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.project-gallery__item {
  overflow: hidden;
  aspect-ratio: 4 / 3;
}

.project-gallery__item:first-child {
  grid-column: 1 / -1;
  aspect-ratio: 21 / 9;
}

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

.project-gallery__item:hover img {
  transform: scale(1.03);
}

.cta-block {
  margin: 0 clamp(20px, 5vw, 80px) clamp(64px, 10vh, 100px);
  padding: clamp(48px, 6vh, 72px);
  background: var(--bg-secondary);
  text-align: center;
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.cta-block h2 {
  font-family: var(--font-serif);
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  font-weight: 400;
  margin-bottom: 16px;
}

.cta-block p {
  color: var(--text-muted);
  margin-bottom: 32px;
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
}

/* ── Responsive ── */

@media (max-width: 1024px) {
  .process__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .featured__card {
    grid-template-columns: 1fr;
  }

  .products-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .project-intro {
    grid-template-columns: 1fr;
  }

  .footer__grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .nav__links,
  .nav__phone {
    display: none;
  }

  .nav__burger {
    display: flex;
  }

  .category-block {
    min-height: 85vh;
    min-height: 85dvh;
  }

  .category-block__bg img {
    object-position: center 35%;
  }

  .category-block__content {
    flex-direction: column;
    align-items: flex-start;
  }

  .process__grid {
    grid-template-columns: 1fr;
  }

  .products-grid {
    grid-template-columns: 1fr;
  }

  .project-gallery__grid {
    grid-template-columns: 1fr;
  }

  .project-gallery__item:first-child {
    aspect-ratio: 16 / 10;
  }

  .footer__grid {
    grid-template-columns: 1fr;
  }
}