/* ========================================
   ZHAOER - Luxury Lacquerware Website
   Color Palette: Cinnabar / Black / Gold
   Inspired by: Hermès aesthetic
   ======================================== */

/* --- CSS Variables --- */
:root {
  --color-cinnabar: #9E2A2B;
  --color-cinnabar-dark: #7A1F20;
  --color-cinnabar-light: #B8383A;
  --color-black: #1A1A1A;
  --color-black-pure: #0A0A0A;
  --color-gold: #C9A96E;
  --color-gold-light: #D4BC8A;
  --color-gold-dark: #A8894E;
  --color-cream: #FAFAF7;
  --color-warm-white: #F5F3EF;
  --color-warm-gray: #E8E4DE;
  --color-text: #2C2C2C;
  --color-text-light: #6B6B6B;
  --color-text-inverse: #FAFAF7;
  --font-serif: "Playfair Display", "Noto Serif SC", "STSong", "SimSun", Georgia, serif;
  --font-sans: "Inter", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", Helvetica, Arial, sans-serif;
  --font-mono: "JetBrains Mono", "Fira Code", monospace;
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 8rem;
  --transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --transition-slow: all 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition);
}

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

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

::selection {
  background: var(--color-gold);
  color: var(--color-black);
}

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif);
  font-weight: 400;
  line-height: 1.2;
  letter-spacing: 0.02em;
}

h1 { font-size: clamp(2.5rem, 5vw, 4.5rem); }
h2 { font-size: clamp(2rem, 4vw, 3.5rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2.25rem); }
h4 { font-size: clamp(1.25rem, 2vw, 1.75rem); }

.text-gold { color: var(--color-gold); }
.text-cinnabar { color: var(--color-cinnabar); }

/* --- Container --- */
.container {
  width: 100%;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

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

/* --- Header / Navigation --- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  padding: var(--spacing-sm) var(--spacing-md);
  transition: var(--transition);
  background: transparent;
}

.header--scrolled {
  background: rgba(26, 26, 26, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: 0.6rem var(--spacing-md);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1400px;
  margin: 0 auto;
}

.header__logo {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  letter-spacing: 0.3em;
  color: var(--color-gold);
  text-transform: uppercase;
}

.header__logo span {
  font-size: 0.6em;
  display: block;
  letter-spacing: 0.5em;
  color: var(--color-gold-light);
  opacity: 0.7;
}

.header__nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.header__nav a {
  font-size: 0.8rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-text-inverse);
  opacity: 0.8;
  position: relative;
}

.header__nav a::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--color-gold);
  transition: var(--transition);
}

.header__nav a:hover {
  opacity: 1;
  color: var(--color-gold);
}

.header__nav a:hover::after,
.header__nav a.active::after {
  width: 100%;
}

.header__nav a.active {
  opacity: 1;
  color: var(--color-gold);
}

/* --- Language Toggle --- */
.lang-toggle {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.3rem 0.8rem;
  border: 1px solid rgba(201, 169, 110, 0.4);
  border-radius: 2px;
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  color: var(--color-gold-light);
  transition: var(--transition);
}

.lang-toggle:hover {
  border-color: var(--color-gold);
  background: rgba(201, 169, 110, 0.1);
}

.lang-toggle .lang-active {
  color: var(--color-gold);
  font-weight: 600;
}

.lang-toggle .lang-sep {
  opacity: 0.3;
}

/* --- Mobile Menu --- */
.header__menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  cursor: pointer;
}

.header__menu-btn span {
  display: block;
  width: 24px;
  height: 1.5px;
  background: var(--color-gold);
  transition: var(--transition);
}

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

  .header__nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    max-width: 360px;
    height: 100vh;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-md);
    background: var(--color-black-pure);
    transition: var(--transition-slow);
  }

  .header__nav.open {
    right: 0;
  }

  .header__nav a {
    font-size: 1rem;
    letter-spacing: 0.3em;
  }
}

/* --- Hero Section --- */
.hero {
  position: relative;
  height: 100vh;
  min-height: 700px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: var(--color-black-pure);
}

.hero__bg {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    var(--color-black-pure) 0%,
    var(--color-cinnabar-dark) 40%,
    var(--color-cinnabar) 60%,
    var(--color-black-pure) 100%
  );
  opacity: 1;
}

.hero__bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 30% 50%, rgba(158, 42, 43, 0.3) 0%, transparent 60%),
    radial-gradient(ellipse at 70% 30%, rgba(201, 169, 110, 0.15) 0%, transparent 50%);
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background: rgba(10, 10, 10, 0.55);
}

/* Lacquer texture overlay */
.hero__texture {
  position: absolute;
  inset: 0;
  opacity: 0.03;
  background-image:
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 2px,
      rgba(201, 169, 110, 0.5) 2px,
      rgba(201, 169, 110, 0.5) 4px
    );
}

.hero__content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 900px;
  padding: var(--spacing-md);
}

.hero__subtitle {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  letter-spacing: 0.5em;
  text-transform: uppercase;
  color: var(--color-gold);
  margin-bottom: var(--spacing-md);
  opacity: 0;
  animation: fadeUp 1s 0.3s forwards;
}

.hero__title {
  font-family: var(--font-serif);
  font-size: clamp(3rem, 8vw, 7rem);
  color: var(--color-text-inverse);
  letter-spacing: 0.15em;
  margin-bottom: var(--spacing-sm);
  opacity: 0;
  animation: fadeUp 1s 0.5s forwards;
}

.hero__title .gold {
  color: var(--color-gold);
}

.hero__desc {
  font-size: 1.1rem;
  color: rgba(250, 250, 247, 0.6);
  letter-spacing: 0.1em;
  margin-bottom: var(--spacing-lg);
  opacity: 0;
  animation: fadeUp 1s 0.7s forwards;
}

.hero__cta {
  display: inline-flex;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
  justify-content: center;
  opacity: 0;
  animation: fadeUp 1s 0.9s forwards;
}

/* --- Buttons --- */
.btn {
  display: inline-block;
  padding: 1rem 2.5rem;
  font-size: 0.75rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  font-weight: 500;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.btn--gold {
  background: var(--color-gold);
  color: var(--color-black);
}

.btn--gold:hover {
  background: var(--color-gold-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(201, 169, 110, 0.3);
}

.btn--cinnabar {
  background: var(--color-cinnabar);
  color: var(--color-text-inverse);
}

.btn--cinnabar:hover {
  background: var(--color-cinnabar-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(158, 42, 43, 0.4);
}

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

.btn--outline:hover {
  background: var(--color-gold);
  color: var(--color-black);
}

.btn--dark {
  background: var(--color-black);
  color: var(--color-gold);
  border: 1px solid var(--color-gold);
}

.btn--dark:hover {
  background: var(--color-gold);
  color: var(--color-black);
}

/* --- Sections --- */
.section {
  padding: var(--spacing-xl) 0;
}

.section--dark {
  background: var(--color-black);
  color: var(--color-text-inverse);
}

.section--warm {
  background: var(--color-warm-white);
}

.section--cinnabar {
  background: var(--color-cinnabar-dark);
  color: var(--color-text-inverse);
}

.section__header {
  text-align: center;
  margin-bottom: var(--spacing-lg);
}

.section__label {
  font-size: 0.7rem;
  letter-spacing: 0.5em;
  text-transform: uppercase;
  color: var(--color-gold);
  margin-bottom: var(--spacing-sm);
  display: block;
}

.section__title {
  margin-bottom: var(--spacing-sm);
}

.section__desc {
  max-width: 600px;
  margin: 0 auto;
  color: var(--color-text-light);
  font-size: 1rem;
}

.section--dark .section__desc {
  color: rgba(250, 250, 247, 0.6);
}

/* --- Product Grid --- */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: var(--spacing-md);
}

@media (max-width: 768px) {
  .product-grid {
    grid-template-columns: 1fr;
  }
}

.product-card {
  position: relative;
  background: var(--color-warm-white);
  overflow: hidden;
  transition: var(--transition);
  cursor: pointer;
  group: true;
}

.product-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.12);
}

.product-card__image {
  width: 100%;
  aspect-ratio: 4/5;
  overflow: hidden;
  position: relative;
}

.product-card__image-inner {
  width: 100%;
  height: 100%;
  transition: var(--transition-slow);
}

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

/* Placeholder images using gradients */
.product-card__image-inner.lacquer-red {
  background: linear-gradient(160deg, #2C1810 0%, #9E2A2B 40%, #7A1F20 70%, #1A1A1A 100%);
}
.product-card__image-inner.lacquer-black {
  background: linear-gradient(160deg, #1A1A1A 0%, #2C2C2C 30%, #0A0A0A 60%, #3C3C3C 100%);
}
.product-card__image-inner.lacquer-gold {
  background: linear-gradient(160deg, #1A1A1A 0%, #C9A96E 50%, #A8894E 80%, #1A1A1A 100%);
}
.product-card__image-inner.lacquer-mixed {
  background: linear-gradient(160deg, #9E2A2B 0%, #1A1A1A 30%, #C9A96E 60%, #7A1F20 100%);
}
.product-card__image-inner.lacquer-cream {
  background: linear-gradient(160deg, #F5F3EF 0%, #C9A96E 40%, #E8E4DE 70%, #1A1A1A 100%);
}

.product-card__year {
  position: absolute;
  top: var(--spacing-sm);
  left: var(--spacing-sm);
  font-size: 0.65rem;
  letter-spacing: 0.3em;
  color: var(--color-gold);
  background: rgba(26, 26, 26, 0.8);
  padding: 0.3rem 0.8rem;
  backdrop-filter: blur(10px);
}

.product-card__info {
  padding: var(--spacing-sm) var(--spacing-sm) var(--spacing-md);
}

.product-card__type {
  font-size: 0.65rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--color-gold-dark);
  margin-bottom: 0.3rem;
}

.product-card__name {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  color: var(--color-text);
  margin-bottom: 0.5rem;
}

.product-card__desc {
  font-size: 0.85rem;
  color: var(--color-text-light);
  line-height: 1.6;
}

/* --- Story / Craft Section --- */
.story-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-lg);
  align-items: center;
}

@media (max-width: 768px) {
  .story-grid {
    grid-template-columns: 1fr;
  }
}

.story-grid__image {
  width: 100%;
  aspect-ratio: 3/4;
  background: linear-gradient(160deg, var(--color-cinnabar-dark) 0%, var(--color-black) 50%, var(--color-gold-dark) 100%);
  position: relative;
  overflow: hidden;
}

.story-grid__image::after {
  content: "";
  position: absolute;
  inset: 0;
  border: 1px solid rgba(201, 169, 110, 0.3);
}

.story-grid__content {
  padding: var(--spacing-md) 0;
}

.story-grid__content h2 {
  margin-bottom: var(--spacing-md);
}

.story-grid__content p {
  margin-bottom: var(--spacing-sm);
  color: var(--color-text-light);
}

.section--dark .story-grid__content p {
  color: rgba(250, 250, 247, 0.65);
}

/* --- Divider --- */
.divider {
  width: 60px;
  height: 1px;
  background: var(--color-gold);
  margin: var(--spacing-md) auto;
}

.divider--left {
  margin-left: 0;
}

/* --- Quote --- */
.quote {
  text-align: center;
  padding: var(--spacing-lg) 0;
}

.quote__text {
  font-family: var(--font-serif);
  font-size: clamp(1.5rem, 3vw, 2.5rem);
  color: var(--color-text);
  font-style: italic;
  max-width: 800px;
  margin: 0 auto var(--spacing-sm);
}

.section--dark .quote__text {
  color: var(--color-text-inverse);
}

.quote__author {
  font-size: 0.75rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--color-gold);
}

/* --- Process Steps --- */
.process-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-md);
}

@media (max-width: 768px) {
  .process-grid {
    grid-template-columns: 1fr;
  }
}

.process-step {
  text-align: center;
  padding: var(--spacing-md);
  position: relative;
}

.process-step__number {
  font-family: var(--font-serif);
  font-size: 3rem;
  color: var(--color-gold);
  opacity: 0.3;
  margin-bottom: var(--spacing-sm);
}

.process-step__title {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  margin-bottom: var(--spacing-xs);
  color: var(--color-text);
}

.section--dark .process-step__title {
  color: var(--color-text-inverse);
}

.process-step__desc {
  font-size: 0.9rem;
  color: var(--color-text-light);
  line-height: 1.7;
}

.section--dark .process-step__desc {
  color: rgba(250, 250, 247, 0.55);
}

/* --- Custom / Commission Form --- */
.custom-form {
  max-width: 700px;
  margin: 0 auto;
}

.form-group {
  margin-bottom: var(--spacing-md);
}

.form-group label {
  display: block;
  font-size: 0.7rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--color-gold);
  margin-bottom: 0.5rem;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 1rem;
  border: 1px solid var(--color-warm-gray);
  background: var(--color-cream);
  font-family: var(--font-sans);
  font-size: 1rem;
  color: var(--color-text);
  transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--color-gold);
  box-shadow: 0 0 0 2px rgba(201, 169, 110, 0.2);
}

.form-group textarea {
  min-height: 150px;
  resize: vertical;
}

/* --- Contact --- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-lg);
}

@media (max-width: 768px) {
  .contact-grid {
    grid-template-columns: 1fr;
  }
}

.contact-info {
  padding: var(--spacing-md) 0;
}

.contact-info__item {
  margin-bottom: var(--spacing-md);
}

.contact-info__label {
  font-size: 0.65rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--color-gold);
  margin-bottom: 0.3rem;
}

.contact-info__value {
  font-size: 1.1rem;
  color: var(--color-text);
}

.section--dark .contact-info__value {
  color: var(--color-text-inverse);
}

/* --- Footer --- */
.footer {
  background: var(--color-black-pure);
  color: var(--color-text-inverse);
  padding: var(--spacing-lg) 0 var(--spacing-md);
}

.footer__inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

@media (max-width: 768px) {
  .footer__inner {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }
}

.footer__brand {
  max-width: 300px;
}

.footer__logo {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  letter-spacing: 0.3em;
  color: var(--color-gold);
  margin-bottom: var(--spacing-sm);
}

.footer__desc {
  font-size: 0.9rem;
  color: rgba(250, 250, 247, 0.5);
  line-height: 1.7;
}

.footer__heading {
  font-size: 0.7rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--color-gold);
  margin-bottom: var(--spacing-sm);
}

.footer__links {
  list-style: none;
}

.footer__links li {
  margin-bottom: 0.5rem;
}

.footer__links a {
  font-size: 0.85rem;
  color: rgba(250, 250, 247, 0.5);
}

.footer__links a:hover {
  color: var(--color-gold);
}

.footer__bottom {
  border-top: 1px solid rgba(201, 169, 110, 0.15);
  padding-top: var(--spacing-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.75rem;
  color: rgba(250, 250, 247, 0.3);
}

@media (max-width: 768px) {
  .footer__bottom {
    flex-direction: column;
    gap: var(--spacing-xs);
    text-align: center;
  }
}

/* --- Animations --- */
@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: var(--transition-slow);
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- Gold Shimmer Effect --- */
.shimmer {
  background: linear-gradient(
    90deg,
    var(--color-gold) 0%,
    var(--color-gold-light) 25%,
    var(--color-gold) 50%,
    var(--color-gold-light) 75%,
    var(--color-gold) 100%
  );
  background-size: 200% auto;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: shimmer 4s linear infinite;
}

/* --- Page Transition --- */
.page-enter {
  animation: pageEnter 0.6s ease forwards;
}

@keyframes pageEnter {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* --- Scrollbar --- */
::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: var(--color-black);
}

::-webkit-scrollbar-thumb {
  background: var(--color-gold-dark);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-gold);
}

/* --- Loading --- */
.loader {
  position: fixed;
  inset: 0;
  background: var(--color-black-pure);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: var(--spacing-sm);
  transition: opacity 0.6s ease;
}

.loader.hidden {
  opacity: 0;
  pointer-events: none;
}

.loader__text {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  letter-spacing: 0.5em;
  color: var(--color-gold);
}

.loader__bar {
  width: 120px;
  height: 1px;
  background: rgba(201, 169, 110, 0.2);
  position: relative;
  overflow: hidden;
}

.loader__bar::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  width: 40%;
  background: var(--color-gold);
  animation: loaderSlide 1.2s ease infinite;
}

@keyframes loaderSlide {
  0% { left: -40%; }
  100% { left: 100%; }
}