/* ========================================
   Nail Shapes Hub — Page Styles
   Matches NailArk main site design system
   ======================================== */

/* --- Variables (same as main site) --- */
:root {
  --color-primary: #e8a0bf;
  --color-primary-dark: #d4789e;
  --color-secondary: #f5e6cc;
  --color-accent: #c9a0dc;
  --color-bg: #fdf8f4;
  --color-bg-alt: #fff5ee;
  --color-text: #3d2c2c;
  --color-text-light: #7a6565;
  --color-white: #ffffff;
  --color-overlay: rgba(61, 44, 44, 0.6);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.15);
  --radius: 12px;
  --radius-sm: 8px;
  --transition: 0.3s ease;
  --max-width: 1200px;
  --font-logo: "Cormorant Garamond", "LXGW WenKai", serif;
  --font-heading: "LXGW WenKai", "PingFang SC", serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

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

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

body {
  font-family: var(--font-body);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.7;
  font-weight: 400;
}

a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

/* --- Navigation --- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.navbar.scrolled {
  background: rgba(255, 255, 255, 0.98);
  box-shadow: var(--shadow-md);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  font-family: var(--font-logo);
  font-size: 1.7rem;
  font-weight: 600;
  color: var(--color-primary-dark);
  letter-spacing: 1px;
  font-style: italic;
}

.logo span {
  color: var(--color-text);
  font-style: normal;
  font-weight: 700;
}

.nav-links {
  display: flex;
  gap: 32px;
}

.nav-links a {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 400;
  color: var(--color-text-light);
  transition: color var(--transition);
  position: relative;
  letter-spacing: 1px;
}

.nav-links a::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: width var(--transition);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--color-primary-dark);
}

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

.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(--color-text);
  border-radius: 2px;
  transition: var(--transition);
}

.nav-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* --- Hero --- */
.hero {
  position: relative;
  height: 55vh;
  min-height: 400px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
}

.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: blur(2px) brightness(0.6);
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    rgba(26, 10, 18, 0.5) 0%,
    rgba(26, 10, 18, 0.7) 60%,
    rgba(26, 10, 18, 0.9) 100%
  );
}

.hero-content {
  position: relative;
  z-index: 2;
  color: var(--color-white);
}

.hero-breadcrumb {
  font-size: 0.85rem;
  margin-bottom: 16px;
  opacity: 0.8;
  letter-spacing: 1px;
}

.hero-breadcrumb a {
  color: var(--color-secondary);
  text-decoration: underline;
  text-underline-offset: 3px;
}

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

h1 {
  font-family: var(--font-logo);
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 16px;
  letter-spacing: 2px;
}

.hero-sub {
  font-size: 1.1rem;
  font-weight: 300;
  margin-bottom: 28px;
  opacity: 0.9;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* --- Buttons --- */
.btn {
  display: inline-block;
  padding: 12px 32px;
  border-radius: 50px;
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 1px;
  transition: all var(--transition);
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: var(--color-white);
  box-shadow: 0 4px 15px rgba(232, 160, 191, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(232, 160, 191, 0.6);
}

/* --- Section Common --- */
.section {
  padding: 80px 0;
}

.section-title {
  font-family: var(--font-heading);
  font-size: 1.8rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 8px;
  color: var(--color-text);
}

.section-subtitle {
  text-align: center;
  color: var(--color-text-light);
  font-size: 1rem;
  margin-bottom: 48px;
}

/* --- Intro --- */
.intro-section {
  padding: 60px 0 20px;
}

.intro-text {
  max-width: 800px;
  margin: 0 auto;
  font-size: 1.05rem;
  line-height: 1.9;
  color: var(--color-text);
}

.intro-text p + p {
  margin-top: 16px;
}

.intro-text strong {
  color: var(--color-primary-dark);
}

/* --- Shapes Grid --- */
.shapes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 28px;
}

.shape-card {
  background: var(--color-white);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
  display: block;
}

.shape-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.shape-card-img {
  position: relative;
  aspect-ratio: 4 / 3;
  overflow: hidden;
}

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

.shape-card:hover .shape-card-img img {
  transform: scale(1.08);
}

.shape-badge {
  position: absolute;
  top: 12px;
  right: 12px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: var(--color-white);
  font-size: 0.72rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 20px;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

.shape-card-body {
  padding: 20px;
}

.shape-card-body h3 {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 2px;
  color: var(--color-text);
}


.shape-desc {
  font-size: 0.9rem;
  color: var(--color-text-light);
  line-height: 1.6;
  margin-bottom: 14px;
}

.shape-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.shape-tags li {
  font-size: 0.72rem;
  padding: 3px 10px;
  border-radius: 20px;
  background: var(--color-bg-alt);
  color: var(--color-text-light);
  font-weight: 500;
  letter-spacing: 0.3px;
}

/* --- Compare Section --- */
.compare-section {
  background: var(--color-bg-alt);
}

.compare-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 24px;
  margin-bottom: 60px;
}

.compare-card {
  background: var(--color-white);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.compare-card:hover {
  box-shadow: var(--shadow-md);
}

.compare-icon {
  font-size: 2rem;
  margin-bottom: 12px;
}

.compare-card h3 {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--color-text);
}

.compare-card p {
  font-size: 0.9rem;
  color: var(--color-text-light);
  line-height: 1.7;
}

.compare-card strong {
  color: var(--color-primary-dark);
}

/* --- Compare Table --- */
.table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}

.compare-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--color-white);
  font-size: 0.9rem;
}

.compare-table th,
.compare-table td {
  padding: 14px 18px;
  text-align: left;
  border-bottom: 1px solid #f0e8e2;
}

.compare-table thead th {
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: var(--color-white);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  position: sticky;
  top: 0;
}

.compare-table tbody tr:hover {
  background: var(--color-bg);
}

.compare-table td:first-child {
  font-weight: 600;
}

.compare-table a {
  color: var(--color-primary-dark);
  text-decoration: underline;
  text-underline-offset: 2px;
}

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

/* --- Gallery Preview --- */
.preview-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-template-rows: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 36px;
}

.preview-img {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  border-radius: var(--radius-sm);
  transition: transform var(--transition);
  cursor: pointer;
}

.preview-img:hover {
  transform: scale(1.05);
}

.cta-wrap {
  text-align: center;
}

/* --- FAQ --- */
.faq-section {
  background: var(--color-bg-alt);
}

.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background: var(--color-white);
  border-radius: var(--radius);
  margin-bottom: 12px;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.faq-item summary {
  padding: 20px 24px;
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 700;
  cursor: pointer;
  color: var(--color-text);
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background var(--transition);
}

.faq-item summary:hover {
  background: var(--color-bg);
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "+";
  font-size: 1.4rem;
  font-weight: 300;
  color: var(--color-primary-dark);
  transition: transform var(--transition);
  flex-shrink: 0;
  margin-left: 16px;
}

.faq-item[open] summary::after {
  content: "−";
}

.faq-answer {
  padding: 0 24px 20px;
  font-size: 0.95rem;
  color: var(--color-text-light);
  line-height: 1.8;
}

.faq-answer strong {
  color: var(--color-primary-dark);
}

/* --- Related / Comparison CTA --- */
.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
}

.related-card {
  position: relative;
  background: var(--color-white);
  border-radius: var(--radius);
  padding: 28px 24px;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
  border-left: 4px solid var(--color-primary);
  display: block;
}

.related-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-left-color: var(--color-accent);
}

.related-vs {
  position: absolute;
  top: 12px;
  right: 16px;
  font-family: var(--font-logo);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-accent);
  letter-spacing: 2px;
}

.related-card h3 {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 6px;
  color: var(--color-text);
}

.related-card p {
  font-size: 0.85rem;
  color: var(--color-text-light);
  line-height: 1.6;
}

/* --- Footer --- */
.footer {
  background: #1a0a12;
  color: rgba(255, 255, 255, 0.8);
  padding: 60px 0 30px;
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand .logo {
  color: var(--color-white);
  margin-bottom: 12px;
  display: inline-block;
}

.footer-brand p {
  font-size: 0.9rem;
  opacity: 0.7;
  margin-top: 8px;
}

.footer-links h4 {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 16px;
  letter-spacing: 0.5px;
}

.footer-links ul {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-links a {
  font-size: 0.85rem;
  opacity: 0.7;
  transition: opacity var(--transition), color var(--transition);
}

.footer-links a:hover {
  opacity: 1;
  color: var(--color-primary);
}

.footer-bottom {
  text-align: center;
  padding-top: 30px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 0.82rem;
  opacity: 0.5;
}

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

  .nav-links {
    position: fixed;
    top: 64px;
    left: 0;
    width: 100%;
    flex-direction: column;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    padding: 20px;
    gap: 16px;
    transform: translateY(-120%);
    transition: transform var(--transition);
    box-shadow: var(--shadow-md);
  }

  .nav-links.open {
    transform: translateY(0);
  }

  .hero {
    height: 45vh;
    min-height: 320px;
  }

  h1 {
    font-size: 1.8rem;
  }

  .section {
    padding: 50px 0;
  }

  .shapes-grid {
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 16px;
  }

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

  .preview-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .footer-content {
    grid-template-columns: 1fr 1fr;
    gap: 30px;
  }

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

@media (max-width: 480px) {
  .shapes-grid {
    grid-template-columns: 1fr;
  }

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

  .footer-content {
    grid-template-columns: 1fr;
  }

  .compare-table {
    font-size: 0.8rem;
  }

  .compare-table th,
  .compare-table td {
    padding: 10px 12px;
  }
}