/*
 * CustomsExcel.com - Main Stylesheet
 * Version: v1.0.0
 * 
 * Design System: Premium Industrial-Modern
 * Fonts: Outfit (display), Plus Jakarta Sans (body)
 */

/* ============================================
   CSS Custom Properties (Design Tokens)
   ============================================ */

:root {
  /* Primary Colors */
  --color-primary: #0A1628;
  --color-primary-light: #1a2d4a;
  --color-primary-dark: #050d18;
  
  /* Accent Colors */
  --color-accent: #00D4AA;
  --color-accent-light: #33debb;
  --color-accent-dark: #00a888;
  
  /* Secondary Accent */
  --color-secondary: #F59E0B;
  --color-secondary-light: #fbbf24;
  --color-secondary-dark: #d97706;
  
  /* Neutrals */
  --color-white: #FFFFFF;
  --color-gray-50: #F8FAFC;
  --color-gray-100: #F1F5F9;
  --color-gray-200: #E2E8F0;
  --color-gray-300: #CBD5E1;
  --color-gray-400: #94A3B8;
  --color-gray-500: #64748B;
  --color-gray-600: #475569;
  --color-gray-700: #334155;
  --color-gray-800: #1E293B;
  --color-gray-900: #0F172A;
  --color-black: #000000;
  
  /* Semantic Colors */
  --color-success: #10B981;
  --color-warning: #F59E0B;
  --color-error: #EF4444;
  --color-info: #3B82F6;
  
  /* Typography */
  --font-display: 'Outfit', system-ui, sans-serif;
  --font-body: 'Plus Jakarta Sans', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  
  /* Font Sizes */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  --text-5xl: 3rem;
  --text-6xl: 3.75rem;
  --text-7xl: 4.5rem;
  
  /* Font Weights */
  --font-normal: 400;
  --font-medium: 500;
  --font-semibold: 600;
  --font-bold: 700;
  --font-extrabold: 800;
  
  /* Line Heights */
  --leading-none: 1;
  --leading-tight: 1.25;
  --leading-snug: 1.375;
  --leading-normal: 1.5;
  --leading-relaxed: 1.625;
  --leading-loose: 2;
  
  /* Spacing */
  --space-0: 0;
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;
  
  /* Border Radius */
  --radius-none: 0;
  --radius-sm: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-xl: 0.75rem;
  --radius-2xl: 1rem;
  --radius-3xl: 1.5rem;
  --radius-full: 9999px;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
  --shadow-2xl: 0 25px 50px -12px rgb(0 0 0 / 0.25);
  --shadow-glow: 0 0 30px rgb(0 212 170 / 0.3);
  --shadow-glow-lg: 0 0 60px rgb(0 212 170 / 0.4);
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 200ms ease;
  --transition-slow: 300ms ease;
  --transition-slower: 500ms ease;
  
  /* Z-Index */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal-backdrop: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;
  
  /* Container */
  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1024px;
  --container-xl: 1280px;
  --container-2xl: 1536px;
}

/* Dark mode variables */
[data-theme="dark"] {
  --color-bg: var(--color-gray-900);
  --color-bg-secondary: var(--color-gray-800);
  --color-text: var(--color-gray-100);
  --color-text-secondary: var(--color-gray-400);
  --color-border: var(--color-gray-700);
}

/* Light mode variables */
[data-theme="light"],
:root {
  --color-bg: var(--color-white);
  --color-bg-secondary: var(--color-gray-50);
  --color-text: var(--color-gray-900);
  --color-text-secondary: var(--color-gray-600);
  --color-border: var(--color-gray-200);
}


/* ============================================
   CSS Reset & Base
   ============================================ */

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

* {
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, picture, video, canvas, svg {
  display: block;
  max-width: 100%;
}

input, button, textarea, select {
  font: inherit;
}

p, h1, h2, h3, h4, h5, h6 {
  overflow-wrap: break-word;
}

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

ul, ol {
  list-style: none;
}


/* ============================================
   Typography
   ============================================ */

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: var(--font-bold);
  line-height: var(--leading-tight);
  color: var(--color-text);
}

h1, .h1 {
  font-size: var(--text-5xl);
  letter-spacing: -0.02em;
}

h2, .h2 {
  font-size: var(--text-4xl);
  letter-spacing: -0.01em;
}

h3, .h3 {
  font-size: var(--text-3xl);
}

h4, .h4 {
  font-size: var(--text-2xl);
}

h5, .h5 {
  font-size: var(--text-xl);
}

h6, .h6 {
  font-size: var(--text-lg);
}

.text-display {
  font-family: var(--font-display);
}

.text-body {
  font-family: var(--font-body);
}

.text-mono {
  font-family: var(--font-mono);
}


/* ============================================
   Layout Utilities
   ============================================ */

.container {
  width: 100%;
  max-width: var(--container-xl);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-4);
  padding-right: var(--space-4);
}

@media (min-width: 640px) {
  .container {
    padding-left: var(--space-6);
    padding-right: var(--space-6);
  }
}

@media (min-width: 1024px) {
  .container {
    padding-left: var(--space-8);
    padding-right: var(--space-8);
  }
}

.section {
  padding-top: var(--space-16);
  padding-bottom: var(--space-16);
}

@media (min-width: 768px) {
  .section {
    padding-top: var(--space-24);
    padding-bottom: var(--space-24);
  }
}


/* ============================================
   Buttons
   ============================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  line-height: var(--leading-none);
  text-align: center;
  white-space: nowrap;
  border: 2px solid transparent;
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-base);
  outline: none;
}

.btn:focus-visible {
  box-shadow: 0 0 0 3px rgb(0 212 170 / 0.4);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Primary Button */
.btn-primary {
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-dark) 100%);
  color: var(--color-primary);
  border-color: var(--color-accent);
}

.btn-primary:hover:not(:disabled) {
  background: linear-gradient(135deg, var(--color-accent-light) 0%, var(--color-accent) 100%);
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

/* Secondary Button */
.btn-secondary {
  background: transparent;
  color: var(--color-accent);
  border-color: var(--color-accent);
}

.btn-secondary:hover:not(:disabled) {
  background: var(--color-accent);
  color: var(--color-primary);
}

/* Ghost Button */
.btn-ghost {
  background: transparent;
  color: var(--color-text);
  border-color: transparent;
}

.btn-ghost:hover:not(:disabled) {
  background: var(--color-gray-100);
}

/* Dark Button */
.btn-dark {
  background: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}

.btn-dark:hover:not(:disabled) {
  background: var(--color-primary-light);
  border-color: var(--color-primary-light);
}

/* Button Sizes */
.btn-sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-xs);
}

.btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-base);
}

.btn-xl {
  padding: var(--space-5) var(--space-10);
  font-size: var(--text-lg);
}


/* ============================================
   Form Elements
   ============================================ */

.form-group {
  margin-bottom: var(--space-4);
}

.form-label {
  display: block;
  margin-bottom: var(--space-2);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-text);
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-base);
  color: var(--color-text);
  background-color: var(--color-bg);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: all var(--transition-fast);
  outline: none;
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgb(0 212 170 / 0.1);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--color-gray-400);
}

.form-input.is-invalid,
.form-textarea.is-invalid {
  border-color: var(--color-error);
}

.form-error {
  margin-top: var(--space-1);
  font-size: var(--text-sm);
  color: var(--color-error);
}

.form-hint {
  margin-top: var(--space-1);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

.form-checkbox,
.form-radio {
  width: 1.25rem;
  height: 1.25rem;
  accent-color: var(--color-accent);
  cursor: pointer;
}


/* ============================================
   Cards
   ============================================ */

.card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2xl);
  overflow: hidden;
  transition: all var(--transition-base);
}

.card:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-lg);
}

.card-body {
  padding: var(--space-6);
}

.card-header {
  padding: var(--space-4) var(--space-6);
  border-bottom: 1px solid var(--color-border);
}

.card-footer {
  padding: var(--space-4) var(--space-6);
  border-top: 1px solid var(--color-border);
  background: var(--color-bg-secondary);
}

/* Glass Card */
.card-glass {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.2);
}


/* ============================================
   Badges
   ============================================ */

.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  border-radius: var(--radius-full);
}

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

.badge-secondary {
  background: var(--color-secondary);
  color: var(--color-white);
}

.badge-success {
  background: rgb(16 185 129 / 0.1);
  color: var(--color-success);
}

.badge-warning {
  background: rgb(245 158 11 / 0.1);
  color: var(--color-warning);
}

.badge-error {
  background: rgb(239 68 68 / 0.1);
  color: var(--color-error);
}

.badge-info {
  background: rgb(59 130 246 / 0.1);
  color: var(--color-info);
}


/* ============================================
   Navigation
   ============================================ */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 99999;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border);
  transition: all var(--transition-base);
}

.navbar.scrolled {
  box-shadow: var(--shadow-md);
}

.navbar-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  color: var(--color-primary);
  user-select: none;
  -webkit-user-select: none;
}

.navbar-brand img {
  border-radius: 14px;
  pointer-events: none;
}

.navbar-brand .brand-accent {
  color: var(--color-accent);
}

.navbar-nav {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.nav-link {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-text-secondary);
  border-radius: var(--radius-lg);
  transition: all var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-accent);
  background: rgb(0 212 170 / 0.1);
}

.navbar-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

/* Mobile Menu Sidebar */
.mobile-menu-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 999998;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
}

.mobile-menu-overlay.active {
  opacity: 1;
  visibility: visible;
}

.mobile-menu-sidebar {
  position: fixed;
  top: 0;
  right: -300px;
  width: 300px;
  height: 100vh;
  background: #ffffff;
  z-index: 999999;
  display: flex;
  flex-direction: column;
  transition: right 0.3s ease;
  box-shadow: -5px 0 30px rgba(0, 0, 0, 0.15);
}

.mobile-menu-sidebar.active {
  right: 0;
}

.mobile-menu-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4);
  border-bottom: 1px solid var(--color-border);
}

.mobile-menu-title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: var(--font-bold);
}

.mobile-menu-close {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-lg);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.mobile-menu-close:hover {
  background: var(--color-gray-100);
  color: var(--color-text);
}

.mobile-menu-body {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-2) 0;
}

.mobile-nav-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4);
  font-size: var(--text-base);
  font-weight: var(--font-medium);
  color: var(--color-text);
  transition: all var(--transition-fast);
}

.mobile-nav-link i {
  font-size: 20px;
  color: var(--color-text-secondary);
}

.mobile-nav-link:hover,
.mobile-nav-link.active {
  background: rgba(0, 212, 170, 0.1);
  color: var(--color-accent);
}

.mobile-nav-link:hover i,
.mobile-nav-link.active i {
  color: var(--color-accent);
}

.mobile-menu-footer {
  padding: var(--space-4);
  border-top: 1px solid var(--color-border);
}

/* Navbar Responsive */
@media (max-width: 767px) {
  .navbar-container {
    height: 64px;
  }

  .navbar-brand {
    font-size: var(--text-lg);
  }

  .navbar-brand img {
    width: 32px;
    height: 32px;
  }

  .navbar-nav {
    display: none !important;
  }

  .navbar-actions .btn span {
    display: none;
  }

  .navbar-actions .btn i {
    margin: 0;
  }

  #mobile-menu-toggle {
    display: flex !important;
  }
}

@media (min-width: 768px) {
  .mobile-menu-sidebar,
  .mobile-menu-overlay,
  #mobile-menu,
  #mobile-menu-overlay {
    display: none !important;
  }

  #mobile-menu-toggle {
    display: none !important;
  }
}


/* ============================================
   Animations
   ============================================ */

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

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

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

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

@keyframes glow {
  0%, 100% { box-shadow: 0 0 20px rgb(0 212 170 / 0.3); }
  50% { box-shadow: 0 0 40px rgb(0 212 170 / 0.5); }
}

.animate-fade-in { animation: fadeIn 0.5s ease forwards; }
.animate-fade-in-up { animation: fadeInUp 0.5s ease forwards; }
.animate-fade-in-down { animation: fadeInDown 0.5s ease forwards; }
.animate-slide-in-left { animation: slideInLeft 0.5s ease forwards; }
.animate-slide-in-right { animation: slideInRight 0.5s ease forwards; }
.animate-pulse { animation: pulse 2s ease-in-out infinite; }
.animate-spin { animation: spin 1s linear infinite; }
.animate-float { animation: float 3s ease-in-out infinite; }
.animate-glow { animation: glow 2s ease-in-out infinite; }

/* Staggered animations */
.stagger-1 { animation-delay: 0.1s; }
.stagger-2 { animation-delay: 0.2s; }
.stagger-3 { animation-delay: 0.3s; }
.stagger-4 { animation-delay: 0.4s; }
.stagger-5 { animation-delay: 0.5s; }


/* ============================================
   Utilities
   ============================================ */

/* Display */
.hidden { display: none !important; }
.block { display: block; }
.inline-block { display: inline-block; }
.flex { display: flex; }
.inline-flex { display: inline-flex; }
.grid { display: grid; }

/* Flexbox */
.flex-row { flex-direction: row; }
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.items-start { align-items: flex-start; }
.items-center { align-items: center; }
.items-end { align-items: flex-end; }
.justify-start { justify-content: flex-start; }
.justify-center { justify-content: center; }
.justify-end { justify-content: flex-end; }
.justify-between { justify-content: space-between; }
.gap-1 { gap: var(--space-1); }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.gap-8 { gap: var(--space-8); }

/* Text Alignment */
.text-left { text-align: left; }
.text-center { text-align: center; }
.text-right { text-align: right; }

/* Text Colors */
.text-primary { color: var(--color-primary); }
.text-accent { color: var(--color-accent); }
.text-secondary { color: var(--color-text-secondary); }
.text-success { color: var(--color-success); }
.text-warning { color: var(--color-warning); }
.text-error { color: var(--color-error); }
.text-white { color: var(--color-white); }

/* Background Colors */
.bg-primary { background-color: var(--color-primary); }
.bg-accent { background-color: var(--color-accent); }
.bg-white { background-color: var(--color-white); }
.bg-gray-50 { background-color: var(--color-gray-50); }
.bg-gray-100 { background-color: var(--color-gray-100); }

/* Spacing */
.m-0 { margin: 0; }
.m-auto { margin: auto; }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }
.my-4 { margin-top: var(--space-4); margin-bottom: var(--space-4); }
.my-8 { margin-top: var(--space-8); margin-bottom: var(--space-8); }

.p-0 { padding: 0; }
.p-4 { padding: var(--space-4); }
.p-6 { padding: var(--space-6); }
.p-8 { padding: var(--space-8); }
.py-4 { padding-top: var(--space-4); padding-bottom: var(--space-4); }
.py-8 { padding-top: var(--space-8); padding-bottom: var(--space-8); }
.px-4 { padding-left: var(--space-4); padding-right: var(--space-4); }
.px-6 { padding-left: var(--space-6); padding-right: var(--space-6); }

/* Width */
.w-full { width: 100%; }
.max-w-sm { max-width: var(--container-sm); }
.max-w-md { max-width: var(--container-md); }
.max-w-lg { max-width: var(--container-lg); }
.max-w-xl { max-width: var(--container-xl); }

/* Border Radius */
.rounded { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-xl { border-radius: var(--radius-xl); }
.rounded-2xl { border-radius: var(--radius-2xl); }
.rounded-full { border-radius: var(--radius-full); }

/* Shadows */
.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow-md { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }
.shadow-xl { box-shadow: var(--shadow-xl); }

/* Overflow */
.overflow-hidden { overflow: hidden; }
.overflow-auto { overflow: auto; }

/* Position */
.relative { position: relative; }
.absolute { position: absolute; }
.fixed { position: fixed; }
.sticky { position: sticky; }

/* Cursor */
.cursor-pointer { cursor: pointer; }

/* User select */
.no-select {
  user-select: none;
  -webkit-user-select: none;
}

.no-pointer {
  pointer-events: none;
}

/* Cart badge hidden by default */
.cart-badge {
  display: none;
}

.cart-badge.visible {
  display: flex;
}

/* Mobile menu toggle position */
.mobile-menu-toggle {
  position: relative;
  z-index: 9999999;
}

/* Mobile menu sidebar positioning */
#mobile-menu {
  position: fixed !important;
  top: 0 !important;
  right: -280px;
  width: 280px !important;
  height: 100vh !important;
  background: #fff !important;
  z-index: 9999999 !important;
  display: flex !important;
  flex-direction: column !important;
  box-shadow: -5px 0 30px rgba(0,0,0,0.2) !important;
  transition: right 0.3s ease !important;
  visibility: visible !important;
  opacity: 1 !important;
}

#mobile-menu.open {
  right: 0;
}

/* Cart sidebar positioning */
#cart-sidebar {
  position: fixed !important;
  top: 0 !important;
  right: -400px;
  width: 400px !important;
  max-width: 100vw !important;
  height: 100vh !important;
  background: #fff !important;
  z-index: 9999999 !important;
  display: flex !important;
  flex-direction: column !important;
  box-shadow: -4px 0 20px rgba(0,0,0,0.15) !important;
  transition: right 0.3s ease !important;
}

#cart-sidebar.open {
  right: 0;
}

/* Opacity */
.opacity-0 { opacity: 0; }
.opacity-50 { opacity: 0.5; }
.opacity-100 { opacity: 1; }

/* Transitions */
.transition { transition: all var(--transition-base); }
.transition-fast { transition: all var(--transition-fast); }
.transition-slow { transition: all var(--transition-slow); }

/* Responsive visibility */
.hidden { display: none !important; }

/* md: prefix = applies at 768px and above */
@media (min-width: 768px) {
  .md\:block { display: block !important; }
  .md\:flex { display: flex !important; }
  .md\:hidden { display: none !important; }
  .md\:inline { display: inline !important; }
}

@media (min-width: 1024px) {
  .lg\:block { display: block !important; }
  .lg\:flex { display: flex !important; }
  .lg\:hidden { display: none !important; }
}