/* fashion-showcase-080129/frontend/public/style.css */

/* ==========================================================================
   Variables & Reset
   ========================================================================== */
:root {
  --font-primary: 'Helvetica Neue', Helvetica, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', Arial, sans-serif;
  --color-bg: #ffffff;
  --color-text: #0a0a0a;
  --color-subtext: #555555;
  --color-accent: #e9e1d4; /* 低饱和度淡米色 */
  --color-border: #f0f0f0;
  --spacing-base: 2rem;
  --header-height: 80px;
}

/* 覆盖 Pico.css 的部分默认样式以适应极简风格 */
html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-primary);
  background-color: var(--color-bg);
  color: var(--color-text);
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* 移除 Pico 对链接的默认下划线和颜色，改为自定义 */
a {
  text-decoration: none;
  color: inherit;
}
a:hover {
  text-decoration: none;
}

/* 通用排版工具类 */
.text-center { text-align: center; }
.uppercase { text-transform: uppercase; }
.tracking-wide { letter-spacing: 0.1em; }
.hidden { display: none !important; }

/* ==========================================================================
   Navigation
   ========================================================================== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(8px);
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 5%;
  z-index: 1000;
  border-bottom: 1px solid rgba(0,0,0,0.03);
  transition: transform 0.3s ease;
}

.logo {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--color-text);
  z-index: 1001;
}

.nav-menu {
  display: flex;
  gap: 3rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-link {
  font-size: 0.875rem;
  color: var(--color-subtext);
  position: relative;
  padding-bottom: 4px;
  transition: color 0.3s ease;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 1px;
  background-color: var(--color-text);
  transition: width 0.3s ease;
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-text);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

/* ==========================================================================
   Homepage Components
   ========================================================================== */
/* Hero Section */
.hero-section {
  height: 90vh;
  width: 100%;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  margin-bottom: var(--spacing-base);
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
  filter: brightness(0.9); /* 轻微压暗以突出文字 */
}

.hero-overlay {
  position: relative;
  z-index: 1;
  text-align: center;
  color: #ffffff;
  mix-blend-mode: normal;
}

.hero-title {
  font-size: 4rem;
  font-weight: 300;
  letter-spacing: 1rem;
  margin-bottom: 1rem;
  text-indent: 1rem; /* 视觉修正letter-spacing带来的偏差 */
  animation: fadeInDown 1.5s ease;
}

.hero-slogan {
  font-size: 1rem;
  letter-spacing: 0.3rem;
  font-weight: 300;
  opacity: 0.9;
  animation: fadeInUp 1.5s ease;
}

/* Intro Text */
.intro-section {
  max-width: 600px;
  margin: 6rem auto;
  padding: 0 1.5rem;
  text-align: center;
}

.intro-text {
  font-size: 0.95rem;
  line-height: 2;
  color: var(--color-subtext);
}

/* Preview Grid */
.preview-section {
  padding: 2rem 5% 6rem;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.preview-card {
  cursor: pointer;
  transition: opacity 0.4s ease;
}

.preview-card:hover {
  opacity: 0.8;
}

.preview-image-wrapper {
  width: 100%;
  aspect-ratio: 3/4;
  overflow: hidden;
  margin-bottom: 1rem;
  background-color: #f5f5f5;
}

.preview-image-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.preview-card:hover img {
  transform: scale(1.03);
}

.preview-title {
  font-size: 0.85rem;
  letter-spacing: 0.05em;
  color: var(--color-text);
  margin-top: 0.5rem;
  text-align: center;
}

/* ==========================================================================
   Collection Page
   ========================================================================== */
.page-title-section {
  padding: calc(var(--header-height) + 4rem) 5% 4rem;
  text-align: center;
}

.page-title {
  font-size: 2rem;
  font-weight: 400;
  letter-spacing: 0.2em;
  margin-bottom: 0.5rem;
}

.page-subtitle {
  font-size: 0.85rem;
  color: var(--color-subtext);
  letter-spacing: 0.1em;
}

.collection-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 3rem 1.5rem;
  padding: 0 5% 6rem;
}

.collection-item {
  display: block;
  cursor: pointer;
}

.collection-item figure {
  margin: 0;
  overflow: hidden;
  aspect-ratio: 3/4;
}

.collection-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease, filter 0.3s ease;
  display: block;
}

.collection-item:hover img {
  transform: scale(1.02);
  filter: contrast(1.05);
}

.item-caption {
  margin-top: 1rem;
  font-size: 0.8rem;
  color: var(--color-subtext);
  text-align: center;
  letter-spacing: 0.05em;
}

/* Modal */
.modal-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(255, 255, 255, 0.98);
  z-index: 2000;
  opacity: 0;
  transition: opacity 0.3s ease;
  justify-content: center;
  align-items: center;
}

.modal-overlay.active {
  display: flex;
  opacity: 1;
}

.modal-container {
  display: flex;
  width: 90%;
  max-width: 1100px;
  height: 80vh;
  gap: 3rem;
  position: relative;
}

.modal-image-box {
  flex: 1.2;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: #fcfcfc;
}

.modal-image-box img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}

.modal-info-box {
  flex: 0.8;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.modal-title {
  font-size: 1.5rem;
  margin-bottom: 1.5rem;
  font-weight: 400;
}

.modal-desc {
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--color-subtext);
  text-align: justify;
}

.modal-close-btn {
  position: absolute;
  top: -2rem;
  right: 0;
  font-size: 2rem;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-text);
  transition: transform 0.3s ease;
  padding: 0;
}

.modal-close-btn:hover {
  transform: rotate(90deg);
}

/* ==========================================================================
   Aesthetic Page
   ========================================================================== */
.aesthetic-container {
  padding: 0 5% 6rem;
}

.content-block {
  margin-bottom: 6rem;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.content-block.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Full Width Image */
.full-width-img {
  width: 100%;
  height: 80vh;
  object-fit: cover;
  display: block;
}

/* Split Layout */
.split-layout {
  display: flex;
  align-items: center;
  gap: 4rem;
}

.split-layout.reverse {
  flex-direction: row-reverse;
}

.split-text {
  flex: 1;
  padding: 2rem;
}

.split-image {
  flex: 1;
  aspect-ratio: 4/5;
  object-fit: cover;
}

.text-heading {
  font-size: 1.25rem;
  margin-bottom: 1.5rem;
  font-weight: 400;
}

.text-body {
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--color-subtext);
}

/* Collage */
.collage-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.collage-item img {
  width: 100%;
  height: 400px;
  object-fit: cover;
}

.collage-caption {
  margin-top: 0.5rem;
  font-size: 0.75rem;
  color: #999;
}

/* Text Only Block */
.text-only-block {
  max-width: 700px;
  margin: 0 auto;
  text-align: center;
  padding: 2rem 0;
}

.text-only-block p {
  font-size: 1.1rem;
  line-height: 2;
  font-style: italic;
  font-family: 'Georgia', serif; /* 衬线体用于散文段落，增加对比 */
  color: var(--color-text);
}

/* ==========================================================================
   Footer & Animations
   ========================================================================== */
.site-footer {
  padding: 4rem 0 2rem;
  text-align: center;
  border-top: 1px solid rgba(0,0,0,0.03);
  margin-top: auto;
}

.copyright {
  font-size: 0.75rem;
  color: #a0a0a0;
  letter-spacing: 1px;
}

/* Keyframes */
@keyframes fadeInDown {
  from { opacity: 0; transform: translateY(-20px); }
  to { opacity: 1; transform: translateY(0); }
}

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

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 900px) {
  .hero-title { font-size: 2.5rem; letter-spacing: 0.5rem; }
  .grid-3 { grid-template-columns: 1fr; gap: 3rem; }
  .split-layout, .split-layout.reverse { flex-direction: column; gap: 2rem; }
  .modal-container { flex-direction: column; height: auto; overflow-y: auto; max-height: 90vh; }
  .modal-close-btn { top: 0.5rem; right: 0.5rem; font-size: 1.5rem; color: #000; }
  .collage-grid { grid-template-columns: 1fr; }
  .collage-item img { height: auto; aspect-ratio: 3/4; }
  .nav-menu { gap: 1.5rem; }
}

@media (max-width: 600px) {
  .site-header { padding: 0 1rem; }
  .preview-section, .collection-grid, .aesthetic-container { padding-left: 1rem; padding-right: 1rem; }
  .hero-title { font-size: 2rem; letter-spacing: 0.2rem; }
  .modal-container { width: 95%; }
}