/* ===================================
   EMU AUDIO - Design System
   プロフェッショナルDTMプラグインブランド
   =================================== */

/* ---------- CSS Variables ---------- */
:root {
  /* Colors - EMU AUDIO Palette (Blue/Teal) */
  --color-bg-dark: #0a1520;
  --color-bg-medium: #122230;
  --color-bg-light: #1a3040;
  --color-bg-card: #0d1a28;

  --color-accent: #2cb5e8;
  --color-accent-light: #5dd3f8;
  --color-accent-dark: #1a8bb8;
  --color-teal: #1d9b9b;

  --color-cream: #f5f5f5;
  --color-cream-dark: #d4d4d4;
  --color-wood: #c9a962;
  --color-wood-dark: #a08040;

  --color-text-primary: #f5f5f5;
  --color-text-secondary: #b0c4d0;
  --color-text-muted: #6a8090;

  /* Typography */
  --font-display: 'Playfair Display', 'Georgia', serif;
  --font-body: 'Inter', 'Helvetica Neue', sans-serif;

  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 4rem;
  --space-xl: 8rem;

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;

  /* Shadows */
  --shadow-soft: 0 4px 20px rgba(0, 0, 0, 0.3);
  --shadow-glow: 0 0 30px rgba(44, 181, 232, 0.2);
  --shadow-inset: inset 0 2px 4px rgba(0, 0, 0, 0.3);

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-medium: 0.4s ease;
  --transition-slow: 0.6s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  background-color: var(--color-bg-dark);
  color: var(--color-text-primary);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

/* Texture overlay */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
  opacity: 0.03;
  pointer-events: none;
  z-index: 1000;
}

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

h1 {
  font-size: clamp(2.5rem, 6vw, 5rem);
  color: var(--color-cream);
}

h2 {
  font-size: clamp(2rem, 4vw, 3.5rem);
  color: var(--color-cream);
}

h3 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  color: var(--color-accent);
}

p {
  font-size: 1rem;
  color: var(--color-text-secondary);
  max-width: 65ch;
}

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

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

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

.section {
  padding: var(--space-xl) 0;
}

/* ---------- Header ---------- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: var(--space-sm) 0;
  background: linear-gradient(to bottom, var(--color-bg-dark), transparent);
  transition: background var(--transition-medium);
}

.header.scrolled {
  background: rgba(10, 21, 32, 0.95);
  backdrop-filter: blur(10px);
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-display);
  font-size: 1.5rem;
  color: var(--color-cream);
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.logo-image {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--color-accent);
  box-shadow: 0 0 15px rgba(44, 181, 232, 0.3);
}

.logo-text span {
  color: var(--color-accent);
}

.nav {
  display: flex;
  gap: var(--space-md);
}

.nav a {
  color: var(--color-cream);
  font-size: 0.9rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  position: relative;
  padding: var(--space-xs) 0;
}

.nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--color-accent);
  transition: width var(--transition-medium);
}

.nav a:hover::after {
  width: 100%;
}

.cart-icon {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  color: var(--color-cream);
  font-size: 0.9rem;
  cursor: pointer;
}

.cart-icon svg {
  width: 24px;
  height: 24px;
  stroke: var(--color-accent);
}

.cart-count {
  position: absolute;
  top: -8px;
  right: -8px;
  background: var(--color-accent);
  color: var(--color-bg-dark);
  font-size: 0.7rem;
  font-weight: 600;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Mobile Menu */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-xs);
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-cream);
  transition: var(--transition-fast);
}

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

  .nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 70%;
    height: 100vh;
    background: var(--color-bg-dark);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: var(--space-lg);
    transition: right var(--transition-medium);
  }

  .nav.active {
    right: 0;
  }

  .nav a {
    font-size: 1.2rem;
  }

  .logo-image {
    width: 40px;
    height: 40px;
  }

  .logo-text {
    font-size: 1.2rem;
  }
}

/* ---------- Hero Section ---------- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  text-align: center;
  padding-top: 80px;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at center, rgba(44, 181, 232, 0.1) 0%, transparent 60%),
    linear-gradient(180deg, var(--color-bg-dark) 0%, var(--color-bg-medium) 100%);
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 900px;
  padding: var(--space-md);
}

.hero-tagline {
  font-family: var(--font-display);
  font-size: 1rem;
  color: var(--color-accent);
  letter-spacing: 0.3em;
  text-transform: uppercase;
  margin-bottom: var(--space-md);
  opacity: 0;
  animation: fadeInUp 1s ease forwards 0.3s;
}

.hero h1 {
  margin-bottom: var(--space-md);
  opacity: 0;
  animation: fadeInUp 1s ease forwards 0.5s;
}

.hero-description {
  font-size: 1.2rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-lg);
  opacity: 0;
  animation: fadeInUp 1s ease forwards 0.7s;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: 1rem 2.5rem;
  font-family: var(--font-body);
  font-size: 0.9rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-medium);
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-dark) 100%);
  color: var(--color-bg-dark);
  box-shadow: var(--shadow-glow);
  font-weight: 600;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 40px rgba(44, 181, 232, 0.4);
  color: var(--color-bg-dark);
}

.btn-secondary {
  background: transparent;
  color: var(--color-cream);
  border: 1px solid var(--color-accent);
}

.btn-secondary:hover {
  background: var(--color-accent);
  color: var(--color-bg-dark);
}

.btn-group {
  display: flex;
  gap: var(--space-sm);
  justify-content: center;
  flex-wrap: wrap;
  opacity: 0;
  animation: fadeInUp 1s ease forwards 0.9s;
}

/* ---------- Product Cards ---------- */
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, 300px);
  gap: var(--space-md);
  justify-content: center;
}

.product-card {
  background: var(--color-bg-card);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid rgba(44, 181, 232, 0.1);
  transition: all var(--transition-medium);
  cursor: pointer;
  max-width: 400px;
}

.product-card:hover {
  transform: translateY(-8px);
  border-color: var(--color-accent);
  box-shadow: var(--shadow-glow);
}

.product-image {
  position: relative;
  aspect-ratio: 4/3;
  background: var(--color-bg-medium);
  overflow: hidden;
}

.product-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

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

.product-badge {
  position: absolute;
  top: var(--space-sm);
  left: var(--space-sm);
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-teal) 100%);
  color: var(--color-bg-dark);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-sm);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.product-info {
  padding: var(--space-md);
}

.product-category {
  font-size: 0.8rem;
  color: var(--color-accent);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: var(--space-xs);
}

.product-name {
  font-family: var(--font-display);
  font-size: 1.5rem;
  color: var(--color-cream);
  margin-bottom: var(--space-xs);
}

.product-description {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-sm);
}

.product-price {
  font-family: var(--font-display);
  font-size: 1.5rem;
  color: var(--color-accent);
}

.product-actions {
  display: flex;
  gap: var(--space-sm);
  margin-top: var(--space-sm);
}

.product-actions .btn {
  flex: 1;
  justify-content: center;
  padding: 0.75rem 1rem;
  font-size: 0.8rem;
}

/* ---------- Section Headers ---------- */
.section-header {
  text-align: center;
  margin-bottom: var(--space-lg);
}

.section-header h2 {
  margin-bottom: var(--space-sm);
}

.section-header p {
  margin: 0 auto;
  max-width: 600px;
}

.section-divider {
  width: 80px;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
  margin: var(--space-md) auto 0;
}

/* ---------- Brand Story Section ---------- */
.brand-story {
  background: linear-gradient(180deg, var(--color-bg-medium) 0%, var(--color-bg-dark) 100%);
  position: relative;
  overflow: hidden;
}

.brand-story::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(44, 181, 232, 0.05) 0%, transparent 70%);
}

.brand-story-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
  align-items: center;
}

@media (max-width: 900px) {
  .brand-story-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }
}

.brand-story-content h2 {
  margin-bottom: var(--space-md);
}

.brand-story-content p {
  margin-bottom: var(--space-sm);
}

.brand-story-image {
  position: relative;
  aspect-ratio: 1;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 2px solid rgba(44, 181, 232, 0.2);
}

.brand-story-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* VU Meter Decoration */
.vu-meter {
  display: flex;
  align-items: flex-end;
  gap: 4px;
  height: 60px;
  padding: var(--space-sm);
  background: var(--color-bg-dark);
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-accent);
}

.vu-bar {
  width: 8px;
  background: linear-gradient(to top, var(--color-accent) 0%, var(--color-teal) 80%);
  border-radius: 2px;
  animation: vuMeter 1s ease-in-out infinite alternate;
}

.vu-bar:nth-child(1) {
  height: 60%;
  animation-delay: 0s;
}

.vu-bar:nth-child(2) {
  height: 80%;
  animation-delay: 0.1s;
}

.vu-bar:nth-child(3) {
  height: 50%;
  animation-delay: 0.2s;
}

.vu-bar:nth-child(4) {
  height: 90%;
  animation-delay: 0.3s;
}

.vu-bar:nth-child(5) {
  height: 70%;
  animation-delay: 0.4s;
}

.vu-bar:nth-child(6) {
  height: 40%;
  animation-delay: 0.5s;
}

/* ---------- Footer ---------- */
.footer {
  background: var(--color-bg-medium);
  padding: var(--space-lg) 0 var(--space-md);
  border-top: 1px solid rgba(44, 181, 232, 0.1);
}

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

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

  .footer .logo-image {
    width: 36px;
    height: 36px;
  }
}

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

.footer-brand .logo {
  margin-bottom: var(--space-sm);
}

.footer-brand p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.footer-column h4 {
  font-family: var(--font-display);
  color: var(--color-cream);
  font-size: 1rem;
  margin-bottom: var(--space-sm);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.footer-column ul {
  list-style: none;
}

.footer-column li {
  margin-bottom: var(--space-xs);
}

.footer-column a {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  transition: color var(--transition-fast);
}

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

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--space-md);
  border-top: 1px solid rgba(44, 181, 232, 0.1);
}

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

.social-links {
  display: flex;
  gap: var(--space-sm);
}

.social-links a {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-accent);
  border-radius: 50%;
  transition: all var(--transition-fast);
}

.social-links a:hover {
  background: var(--color-accent);
}

.social-links svg {
  width: 18px;
  height: 18px;
  fill: var(--color-accent);
  transition: fill var(--transition-fast);
}

.social-links a:hover svg {
  fill: var(--color-bg-dark);
}

/* ---------- Page Headers ---------- */
.page-header {
  padding: 160px 0 80px;
  background: linear-gradient(180deg, var(--color-bg-dark) 0%, var(--color-bg-medium) 100%);
  text-align: center;
}

.page-header h1 {
  margin-bottom: var(--space-sm);
}

.breadcrumb {
  display: flex;
  justify-content: center;
  gap: var(--space-sm);
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.breadcrumb a {
  color: var(--color-text-muted);
}

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

/* ---------- Product Detail ---------- */
.product-detail {
  padding: var(--space-lg) 0;
}

.product-detail-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
  align-items: start;
}

@media (max-width: 900px) {
  .product-detail-grid {
    grid-template-columns: 1fr;
  }
}

.product-gallery {
  position: relative;
}

.product-main-image {
  aspect-ratio: 1;
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 2px solid rgba(44, 181, 232, 0.1);
}

.product-main-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.product-thumbnails {
  display: flex;
  gap: var(--space-sm);
  margin-top: var(--space-sm);
}

.product-thumbnail {
  width: 80px;
  height: 80px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 2px solid transparent;
  cursor: pointer;
  transition: border-color var(--transition-fast);
}

.product-thumbnail.active,
.product-thumbnail:hover {
  border-color: var(--color-accent);
}

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

.product-detail-info h1 {
  font-size: 2.5rem;
  margin-bottom: var(--space-xs);
}

.product-detail-category {
  font-size: 0.9rem;
  color: var(--color-accent);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: var(--space-md);
}

.product-detail-price {
  font-family: var(--font-display);
  font-size: 2.5rem;
  color: var(--color-accent);
  margin-bottom: var(--space-md);
}

.product-detail-description {
  margin-bottom: var(--space-md);
  color: var(--color-text-secondary);
  line-height: 1.8;
}

.product-specs {
  background: var(--color-bg-card);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  margin-bottom: var(--space-md);
}

.product-specs h3 {
  font-size: 1rem;
  margin-bottom: var(--space-sm);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.spec-list {
  display: grid;
  gap: var(--space-xs);
}

.spec-item {
  display: flex;
  justify-content: space-between;
  padding: var(--space-xs) 0;
  border-bottom: 1px solid rgba(44, 181, 232, 0.1);
}

.spec-item:last-child {
  border-bottom: none;
}

.spec-label {
  color: var(--color-text-muted);
}

.spec-value {
  color: var(--color-cream);
  font-weight: 500;
}

.add-to-cart-section {
  display: flex;
  gap: var(--space-sm);
  align-items: center;
}

.quantity-selector {
  display: flex;
  align-items: center;
  background: var(--color-bg-card);
  border-radius: var(--radius-sm);
  border: 1px solid rgba(44, 181, 232, 0.2);
}

.quantity-btn {
  width: 44px;
  height: 44px;
  background: none;
  border: none;
  color: var(--color-cream);
  font-size: 1.2rem;
  cursor: pointer;
  transition: color var(--transition-fast);
}

.quantity-btn:hover {
  color: var(--color-accent);
}

.quantity-value {
  width: 50px;
  text-align: center;
  font-size: 1rem;
  color: var(--color-cream);
}

/* ---------- Cart Page ---------- */
.cart-section {
  padding: var(--space-lg) 0;
}

.cart-empty {
  text-align: center;
  padding: var(--space-xl) 0;
}

.cart-empty h2 {
  margin-bottom: var(--space-md);
}

.cart-container {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--space-lg);
}

@media (max-width: 900px) {
  .cart-container {
    grid-template-columns: 1fr;
  }
}

.cart-items {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.cart-item {
  display: grid;
  grid-template-columns: 100px 1fr auto;
  gap: var(--space-md);
  align-items: center;
  background: var(--color-bg-card);
  padding: var(--space-md);
  border-radius: var(--radius-md);
  border: 1px solid rgba(44, 181, 232, 0.1);
}

.cart-item-image {
  width: 100px;
  height: 100px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--color-bg-medium);
}

.cart-item-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.cart-item-info h3 {
  font-size: 1.2rem;
  color: var(--color-cream);
  margin-bottom: var(--space-xs);
}

.cart-item-info p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.cart-item-price {
  font-family: var(--font-display);
  font-size: 1.2rem;
  color: var(--color-accent);
  margin-top: var(--space-xs);
}

.cart-item-actions {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: var(--space-sm);
}

.remove-btn {
  background: none;
  border: none;
  color: var(--color-text-muted);
  cursor: pointer;
  font-size: 0.8rem;
  transition: color var(--transition-fast);
}

.remove-btn:hover {
  color: #e74c3c;
}

.cart-summary {
  background: var(--color-bg-card);
  padding: var(--space-md);
  border-radius: var(--radius-md);
  border: 1px solid rgba(44, 181, 232, 0.1);
  height: fit-content;
  position: sticky;
  top: 120px;
}

.cart-summary h2 {
  font-size: 1.5rem;
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-sm);
  border-bottom: 1px solid rgba(44, 181, 232, 0.2);
}

.summary-row {
  display: flex;
  justify-content: space-between;
  padding: var(--space-xs) 0;
  color: var(--color-text-secondary);
}

.summary-row.total {
  font-family: var(--font-display);
  font-size: 1.5rem;
  color: var(--color-cream);
  padding-top: var(--space-md);
  margin-top: var(--space-md);
  border-top: 1px solid rgba(44, 181, 232, 0.2);
}

.summary-row.total span:last-child {
  color: var(--color-accent);
}

.checkout-btn {
  width: 100%;
  margin-top: var(--space-md);
}

/* ---------- Filters ---------- */
.filters {
  display: flex;
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
  flex-wrap: wrap;
}

.filter-btn {
  padding: 0.5rem 1.5rem;
  background: transparent;
  border: 1px solid rgba(44, 181, 232, 0.3);
  color: var(--color-text-secondary);
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.filter-btn:hover,
.filter-btn.active {
  border-color: var(--color-accent);
  color: var(--color-accent);
  background: rgba(44, 181, 232, 0.1);
}

/* ---------- Product Filter Tabs ---------- */
.product-filter-tabs {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  margin-bottom: var(--space-lg);
  flex-wrap: wrap;
  padding: 0.5rem;
  background: rgba(10, 21, 32, 0.8);
  backdrop-filter: blur(10px);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(44, 181, 232, 0.15);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
}

.filter-tab {
  position: relative;
  padding: 0.875rem 2rem;
  background: transparent;
  color: var(--color-text-muted);
  border: none;
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;
  transition: all var(--transition-medium);
  overflow: hidden;
}

.filter-tab::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(44, 181, 232, 0.1) 0%, rgba(29, 155, 155, 0.05) 100%);
  border-radius: var(--radius-md);
  opacity: 0;
  transition: opacity var(--transition-medium);
}

.filter-tab::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: 60%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
  transition: transform var(--transition-medium);
}

.filter-tab:hover {
  color: var(--color-cream);
}

.filter-tab:hover::before {
  opacity: 1;
}

.filter-tab:hover::after {
  transform: translateX(-50%) scaleX(1);
}

.filter-tab.active {
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-teal) 100%);
  color: var(--color-bg-dark);
  font-weight: 600;
  box-shadow:
    0 0 20px rgba(44, 181, 232, 0.4),
    0 0 40px rgba(44, 181, 232, 0.2),
    inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.filter-tab.active::before,
.filter-tab.active::after {
  display: none;
}

@media (max-width: 600px) {
  .product-filter-tabs {
    padding: 0.375rem;
    gap: 0.25rem;
  }

  .filter-tab {
    padding: 0.625rem 1rem;
    font-size: 0.75rem;
    letter-spacing: 0.05em;
  }
}

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

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes vuMeter {
  to {
    height: calc(100% - 10%);
  }
}

/* ---------- Utilities ---------- */
.text-center {
  text-align: center;
}

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

.mt-sm {
  margin-top: var(--space-sm);
}

.mt-md {
  margin-top: var(--space-md);
}

.mt-lg {
  margin-top: var(--space-lg);
}

.mb-sm {
  margin-bottom: var(--space-sm);
}

.mb-md {
  margin-bottom: var(--space-md);
}

.mb-lg {
  margin-bottom: var(--space-lg);
}

/* Google Fonts Import */
@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:wght@400;500;600;700&family=Inter:wght@300;400;500;600&display=swap');