/* ========================================
   EPEC International - Common Styles
   Version: V1.0 | Date: 2026-04-08
   ======================================== */

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

/* === Design Tokens === */
:root {
  /* Primary Colors */
  --color-primary:        #0066CC;
  --color-primary-hover:  #0052A3;
  --color-primary-active: #003D7A;
  --color-secondary:      #00A3E0;
  --color-secondary-hover:#0088BB;
  --color-accent:         #FF6600;
  --color-accent-hover:   #E65C00;

  /* Text Colors */
  --color-text-title:   #333333;
  --color-text-body:    #666666;
  --color-text-muted:   #999999;
  --color-text-disabled:#CCCCCC;

  /* Border Colors */
  --color-border:       #E0E0E0;
  --color-border-light: #F0F0F0;

  /* Background Colors */
  --color-bg-page:      #F5F5F5;
  --color-bg-card:      #FFFFFF;
  --color-bg-section:   #FAFAFA;
  --color-white:        #FFFFFF;

  /* Functional Colors */
  --color-success:    #52C41A;
  --color-success-bg: #F6FFED;
  --color-warning:    #FAAD14;
  --color-warning-bg: #FFFBE6;
  --color-error:      #FF4D4F;
  --color-error-bg:   #FFF2F0;
  --color-info:       #1890FF;
  --color-info-bg:    #E6F7FF;

  /* Chemical Safety Colors */
  --color-hazard-red:    #D32F2F;
  --color-hazard-orange:  #F57C00;
  --color-hazard-yellow:  #FFC107;
  --color-hazard-green:   #388E3C;
  --color-hazard-blue:    #1976D2;

  /* Font Sizes */
  --font-size-hero:    38px;
  --font-size-h1:      28px;
  --font-size-h2:      24px;
  --font-size-h3:      20px;
  --font-size-h4:      18px;
  --font-size-body-lg: 16px;
  --font-size-body:    14px;
  --font-size-sm:      12px;
  --font-size-btn:     14px;
  --font-size-label:   12px;
  --font-size-badge:   10px;

  /* Font Weights */
  --font-weight-bold:     700;
  --font-weight-semibold: 600;
  --font-weight-medium:   500;
  --font-weight-regular:  400;
  --font-weight-light:    300;

  /* Spacing */
  --space-xs:   4px;
  --space-sm:   8px;
  --space-md:   16px;
  --space-lg:   24px;
  --space-xl:   32px;
  --space-2xl:  48px;
  --space-3xl:  64px;

  /* Layout */
  --grid-columns:    12;
  --grid-gutter:     24px;
  --grid-max-width: 1200px;
  --page-margin-desktop: 64px;
  --page-margin-tablet:  32px;
  --page-margin-mobile:  16px;

  /* Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;

  /* Shadows */
  --shadow-card: 0 2px 8px rgba(0,0,0,0.08);
  --shadow-card-hover: 0 4px 16px rgba(0,0,0,0.12);
  --shadow-modal: 0 8px 32px rgba(0,0,0,0.2);
}

/* === Dark Mode === */
@media (prefers-color-scheme: dark) {
  :root {
    --color-bg-page:        #121212;
    --color-bg-card:        #1E1E1E;
    --color-bg-section:     #1A1A1A;
    --color-text-title:     #FFFFFF;
    --color-text-body:      #E0E0E0;
    --color-text-muted:     #9E9E9E;
    --color-border:         #333333;
    --color-border-light:   #2A2A2A;
    --color-primary:        #4DA6FF;
    --color-accent:         #FF8533;
    --color-success:        #6DD400;
    --color-error:          #FF6B6D;
    --color-hazard-red:     #EF5350;
    --color-hazard-blue:    #42A5F5;
  }
}

[data-theme="dark"] {
  --color-bg-page:        #121212;
  --color-bg-card:        #1E1E1E;
  --color-bg-section:     #1A1A1A;
  --color-text-title:     #FFFFFF;
  --color-text-body:      #E0E0E0;
  --color-text-muted:     #9E9E9E;
  --color-border:         #333333;
  --color-border-light:   #2A2A2A;
  --color-primary:        #4DA6FF;
  --color-accent:         #FF8533;
  --color-success:        #6DD400;
  --color-error:          #FF6B6D;
  --color-hazard-red:     #EF5350;
  --color-hazard-blue:    #42A5F5;
  /* [N-11] Override shadow variables for dark mode */
  --shadow-card: 0 2px 8px rgba(0,0,0,0.32);
  --shadow-card-hover: 0 4px 16px rgba(0,0,0,0.48);
}

/* === Base Styles === */
html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: "Roboto", "Segoe UI", Arial, "Noto Sans", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: var(--font-size-body);
  line-height: 1.6;
  color: var(--color-text-body);
  background-color: var(--color-bg-page);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: var(--color-primary); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--color-primary-hover); }

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

ul, ol { list-style: none; }

/* === Accessibility === */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--color-primary);
  color: #FFFFFF;
  padding: 8px 16px;
  z-index: 9999;
  transition: top 0.2s;
  text-decoration: none;
}
.skip-link:focus { top: 0; color: #FFFFFF; }

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

[aria-hidden="true"] { display: none; }
[aria-busy="true"] { cursor: wait; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

/* === Container === */
.container {
  max-width: var(--grid-max-width);
  margin: 0 auto;
  padding: 0 var(--page-margin-desktop);
  box-sizing: border-box;
  width: 100%;
}

/* [FIXED C-04] Superwide screen: > 1400px */
@media (min-width: 1400px) {
  :root {
    --page-margin-desktop: 96px;
  }
  .hero {
    padding-left: calc((100vw - var(--grid-max-width)) / 2 + 96px);
    padding-right: calc((100vw - var(--grid-max-width)) / 2 + 96px);
  }
}
@media (max-width: 1199px) { .container { padding: 0 var(--page-margin-tablet); } }
@media (max-width: 767px)  { .container { padding: 0 var(--page-margin-mobile); } }

/* === Header === */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  height: 64px;
  background-color: var(--color-bg-card);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  padding: 0 var(--page-margin-desktop);
  box-sizing: border-box;
}
.site-header__inner {
  max-width: var(--grid-max-width);
  margin: 0 auto;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.site-header__logo {
  font-size: 24px;
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}
.site-header__logo:hover { color: var(--color-primary); }
.site-header__logo-icon {
  width: 36px; height: 36px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-weight: 700; font-size: 18px;
}

.site-header__nav {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
  list-style: none;
}
.site-header__nav a {
  font-size: var(--font-size-body);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-body);
  text-decoration: none;
  padding: 8px 0;
  border-bottom: 2px solid transparent;
  transition: color 0.2s, border-color 0.2s;
}
.site-header__nav a:hover,
.site-header__nav a.is-active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

.site-header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.lang-selector {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  padding: 6px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg-card);
  font-size: var(--font-size-body);
  color: var(--color-text-body);
  cursor: pointer;
  transition: border-color 0.2s;
}
.lang-selector:hover { border-color: var(--color-primary); }

.theme-toggle {
  width: 36px; height: 36px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg-card);
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  font-size: 18px;
  transition: border-color 0.2s;
}
.theme-toggle:hover { border-color: var(--color-primary); }

.mobile-menu-btn {
  display: none;
  width: 36px; height: 36px;
  border: none;
  background: none;
  cursor: pointer;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}
.mobile-menu-btn span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text-title);
  transition: transform 0.2s;
}

@media (max-width: 767px) {
  .site-header { padding: 0 var(--page-margin-mobile); height: 56px; }
  .site-header__nav { display: none; }
  .mobile-menu-btn { display: flex; }
  .mobile-nav {
    display: flex;
    flex-direction: column;
    background-color: var(--color-bg-card);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-md);
    gap: var(--space-sm);
  }
  .mobile-nav a {
    display: block;
    padding: var(--space-sm) var(--space-md);
    color: var(--color-text-body);
    text-decoration: none;
    font-size: var(--font-size-body);
    border-radius: var(--radius-sm);
    transition: background-color 0.2s;
  }
  .mobile-nav a:hover,
  .mobile-nav a.is-active {
    background-color: var(--color-bg-section);
    color: var(--color-primary);
  }
}

/* Desktop: hide mobile nav by default */
@media (min-width: 768px) {
  .mobile-nav { display: none; }
}

/* === Footer === */
.site-footer {
  background-color: #1A1A1A;
  color: var(--color-text-muted);
  padding: var(--space-2xl) var(--page-margin-desktop) var(--space-lg);
  margin-top: var(--space-3xl);
}
.site-footer__inner {
  max-width: var(--grid-max-width);
  margin: 0 auto;
}
.site-footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr 1fr;
  gap: var(--space-xl);
  margin-bottom: var(--space-xl);
}
.site-footer__brand h3 {
  color: #FFFFFF;
  font-size: var(--font-size-h4);
  margin-bottom: var(--space-md);
}
.site-footer__brand p {
  font-size: var(--font-size-body);
  line-height: 1.8;
  color: #999999;
}
.site-footer__col h4 {
  color: #FFFFFF;
  font-size: var(--font-size-body);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--space-md);
}
.site-footer__col a {
  display: block;
  color: #999999;
  text-decoration: none;
  font-size: var(--font-size-body);
  padding: 4px 0;
  transition: color 0.2s;
}
.site-footer__col a:hover { color: #FFFFFF; }
.site-footer__bottom {
  border-top: 1px solid #333333;
  padding-top: var(--space-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-md);
}
.site-footer__copy {
  color: #666666;
  font-size: var(--font-size-sm);
}
.site-footer__compliance {
  display: flex;
  gap: var(--space-md);
  align-items: center;
}
.site-footer__compliance a {
  color: #666666;
  font-size: var(--font-size-sm);
  text-decoration: none;
}
.site-footer__compliance a:hover { color: #FFFFFF; }

@media (max-width: 767px) {
  .site-footer { padding: var(--space-xl) var(--page-margin-mobile) var(--space-lg); }
  .site-footer__grid { grid-template-columns: 1fr; gap: var(--space-lg); }
  .site-footer__bottom { flex-direction: column; text-align: center; }
}

[data-theme="dark"] .site-footer { background-color: #0A0A0A; }

/* === Buttons === */
.btn-primary {
  background-color: var(--color-primary);
  color: #FFFFFF;
  border: none;
  border-radius: var(--radius-sm);
  padding: 10px 24px;
  font-size: var(--font-size-btn);
  font-weight: var(--font-weight-medium);
  height: 40px;
  cursor: pointer;
  transition: background-color 0.2s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  text-decoration: none;
  box-sizing: border-box;
}
.btn-primary:hover { background-color: var(--color-primary-hover); color: #FFFFFF; }
.btn-primary:active { background-color: var(--color-primary-active); }

.btn-secondary {
  background-color: var(--color-white);
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
  border-radius: var(--radius-sm);
  padding: 9px 23px;
  font-size: var(--font-size-btn);
  font-weight: var(--font-weight-medium);
  height: 40px;
  cursor: pointer;
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  text-decoration: none;
  box-sizing: border-box;
}
.btn-secondary:hover { background-color: #EBF5FF; color: var(--color-primary); }

.btn-danger {
  background-color: var(--color-error);
  color: #FFFFFF;
  border: none;
  border-radius: var(--radius-sm);
  padding: 10px 24px;
  font-size: var(--font-size-btn);
  font-weight: var(--font-weight-medium);
  height: 40px;
  cursor: pointer;
  transition: background-color 0.2s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  text-decoration: none;
  box-sizing: border-box;
}
.btn-danger:hover { background-color: #FF7875; color: #FFFFFF; }

.btn-ghost {
  background-color: transparent;
  color: var(--color-primary);
  border: none;
  border-radius: var(--radius-sm);
  padding: 8px 16px;
  font-size: var(--font-size-btn);
  font-weight: var(--font-weight-regular);
  cursor: pointer;
  transition: background-color 0.2s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  text-decoration: none;
}
.btn-ghost:hover { background-color: #E6F0FA; }

.btn-accent {
  background-color: var(--color-accent);
  color: #FFFFFF;
  border: none;
  border-radius: var(--radius-sm);
  padding: 10px 24px;
  font-size: var(--font-size-btn);
  font-weight: var(--font-weight-medium);
  height: 40px;
  cursor: pointer;
  transition: background-color 0.2s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  text-decoration: none;
  box-sizing: border-box;
}
.btn-accent:hover { background-color: var(--color-accent-hover); color: #FFFFFF; }

.btn-sm { height: 32px; padding: 4px 12px; font-size: var(--font-size-sm); }
.btn-lg { height: 48px; padding: 12px 28px; font-size: var(--font-size-body-lg); }

.btn-loading { pointer-events: none; opacity: 0.8; }

/* === Form Elements === */
.input-field {
  width: 100%;
  height: 40px;
  padding: 0 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-body);
  color: var(--color-text-title);
  background-color: var(--color-bg-card);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  box-sizing: border-box;
  outline: none;
}
.input-field:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.12);
}
.input-field::placeholder { color: var(--color-text-muted); }

.select-field {
  appearance: none;
  -webkit-appearance: none;
  width: 100%;
  height: 40px;
  padding: 0 36px 0 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-body);
  color: var(--color-text-title);
  background-color: var(--color-bg-card);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23666' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  cursor: pointer;
  outline: none;
  transition: border-color 0.2s;
  box-sizing: border-box;
}
.select-field:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.12);
}

textarea.input-field {
  height: auto;
  min-height: 100px;
  padding: 10px 12px;
  resize: vertical;
  line-height: 1.6;
}

.form-field { margin-bottom: var(--space-md); }
.form-label {
  display: block;
  font-size: var(--font-size-body);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-title);
  margin-bottom: var(--space-sm);
}
.form-required { color: var(--color-error); margin-left: 4px; }
.form-hint { display: block; font-size: var(--font-size-sm); color: var(--color-text-muted); margin-top: 6px; }
.form-error { display: none; align-items: center; gap: 4px; font-size: var(--font-size-sm); color: var(--color-error); margin-top: 6px; }
.form-field.is-error .form-error { display: flex; }

/* === Cards === */
.card {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  box-shadow: var(--shadow-card);
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}
.card--hoverable:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-2px);
}
.card__header {
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-md);
  border-bottom: 1px solid var(--color-border-light);
}
.card__title {
  font-size: var(--font-size-h4);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-title);
}
.card__body {
  font-size: var(--font-size-body);
  line-height: 1.6;
  color: var(--color-text-body);
}
.card__footer {
  margin-top: var(--space-md);
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-border-light);
  display: flex;
  justify-content: flex-end;
  gap: 12px;
}

/* === Badges === */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
}
.badge-success { background-color: var(--color-success-bg); color: #389E0D; }
.badge-warning { background-color: var(--color-warning-bg); color: #D48806; }
.badge-error { background-color: var(--color-error-bg); color: #CF1322; }
.badge-info { background-color: var(--color-info-bg); color: #096DD9; }

/* [N-12] AI Badge */
.ai-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  font-size: 11px;
  font-weight: 500;
  background: #F0F0F0;
  color: #666666;
  border-left: 3px solid #0066CC;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}
[data-theme="dark"] .ai-badge {
  background: rgba(255,255,255,0.1);
  color: #E0E0E0;
}

/* === Skeleton === */
.skeleton {
  background: linear-gradient(90deg, #F0F0F0 25%, #E0E0E0 50%, #F0F0F0 75%);
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s infinite;
  border-radius: var(--radius-sm);
}
@keyframes skeleton-loading {
  0%   { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}
.skeleton-text  { height: 16px; margin-bottom: var(--space-sm); }
.skeleton-title { height: 24px; width: 60%; margin-bottom: 12px; }

/* === Empty / Error States === */
.empty-state, .error-state {
  text-align: center;
  padding: var(--space-3xl) var(--space-lg);
  color: var(--color-text-muted);
}
.empty-state__icon, .error-state__icon {
  font-size: 64px;
  margin-bottom: var(--space-md);
  opacity: 0.5;
}
.error-state__icon { color: var(--color-error); opacity: 1; }
.empty-state__title, .error-state__title {
  font-size: var(--font-size-h4);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-title);
  margin-bottom: var(--space-sm);
}
.empty-state__desc, .error-state__desc {
  font-size: var(--font-size-body);
  color: var(--color-text-muted);
  margin-bottom: var(--space-lg);
}

/* === Utility === */
.text-center { text-align: center; }
.text-right { text-align: right; }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }
.mt-2xl { margin-top: var(--space-2xl); }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }
.mb-2xl { margin-bottom: var(--space-2xl); }

/* === Section Title === */
.section-title {
  font-size: var(--font-size-h2);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-title);
  text-align: center;
  margin-bottom: var(--space-md);
}
.section-subtitle {
  font-size: var(--font-size-body-lg);
  color: var(--color-text-muted);
  text-align: center;
  max-width: 600px;
  margin: 0 auto var(--space-2xl);
  line-height: 1.6;
}

/* === Dashboard Layout === */
.dashboard-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: var(--space-lg);
  min-height: calc(100vh - 64px - 200px);
  padding: var(--space-lg) 0;
}
.dashboard-sidebar {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-md) 0;
  height: fit-content;
  position: sticky;
  top: 88px;
}
.dashboard-sidebar__user {
  padding: var(--space-md) var(--space-lg);
  border-bottom: 1px solid var(--color-border-light);
  display: flex;
  align-items: center;
  gap: var(--space-md);
}
.dashboard-sidebar__avatar {
  width: 40px; height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-weight: var(--font-weight-bold);
}
.dashboard-sidebar__name {
  font-size: var(--font-size-body);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-title);
}
.dashboard-sidebar__role {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}
.dashboard-sidebar__nav {
  padding: var(--space-sm) 0;
}
.dashboard-sidebar__nav a {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 10px var(--space-lg);
  font-size: var(--font-size-body);
  color: var(--color-text-body);
  text-decoration: none;
  transition: background-color 0.2s, color 0.2s;
  border-left: 3px solid transparent;
}
.dashboard-sidebar__nav a:hover {
  background-color: var(--color-bg-section);
  color: var(--color-text-title);
}
.dashboard-sidebar__nav a.is-active {
  background-color: #EBF5FF;
  color: var(--color-primary);
  border-left-color: var(--color-primary);
  font-weight: var(--font-weight-medium);
}

.dashboard-content {
  min-width: 0;
}

.dashboard-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
}
.stat-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
}
.stat-card__label {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-sm);
}
.stat-card__value {
  font-size: 28px;
  font-weight: var(--font-weight-bold);
  color: var(--color-text-title);
}
.stat-card__change {
  font-size: var(--font-size-sm);
  margin-top: var(--space-xs);
}
.stat-card__change--up { color: var(--color-success); }
.stat-card__change--down { color: var(--color-error); }

@media (max-width: 991px) {
  .dashboard-layout { grid-template-columns: 1fr; }
  .dashboard-sidebar { position: static; }
  .dashboard-stats { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 575px) {
  .dashboard-stats { grid-template-columns: 1fr; }
}

/* === Data Table === */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--font-size-body);
}
.data-table thead { background-color: var(--color-bg-section); }
.data-table th {
  padding: 12px 16px;
  text-align: left;
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-title);
  border-bottom: 2px solid var(--color-border);
  white-space: nowrap;
}
.data-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--color-border-light);
  color: var(--color-text-body);
  vertical-align: middle;
}
.data-table tbody tr:hover { background-color: var(--color-bg-section); }
.data-table__actions {
  display: flex;
  gap: var(--space-sm);
}

@media (max-width: 767px) {
  .data-table { font-size: var(--font-size-sm); }
  .data-table th, .data-table td { padding: 8px 10px; }
}

/* === Page Header (for inner pages) === */
.page-header {
  background-color: var(--color-bg-card);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-lg) 0;
  margin-bottom: var(--space-xl);
}
.page-header__title {
  font-size: var(--font-size-h1);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-title);
  margin-bottom: var(--space-sm);
}
.page-header__desc {
  font-size: var(--font-size-body-lg);
  color: var(--color-text-muted);
}

/* === Tabs === */
.tabs {
  display: flex;
  gap: 0;
  border-bottom: 2px solid var(--color-border);
  margin-bottom: var(--space-xl);
}
.tabs__item {
  padding: 10px 20px;
  font-size: var(--font-size-body);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-muted);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: color 0.2s, border-color 0.2s;
  cursor: pointer;
}
.tabs__item:hover { color: var(--color-text-title); }
.tabs__item.is-active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

/* === Toolbar === */
.toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}
.toolbar__search {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  flex: 1;
  max-width: 400px;
}
.toolbar__search .input-field {
  flex: 1;
}

/* === Progress Bar === */
.progress-bar {
  width: 100%;
  height: 8px;
  background-color: var(--color-border-light);
  border-radius: 4px;
  overflow: hidden;
}
.progress-bar__fill {
  height: 100%;
  border-radius: 4px;
  background-color: var(--color-primary);
  transition: width 0.3s ease;
}

/* === Pagination === */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-sm);
  margin-top: var(--space-xl);
}
.pagination__item {
  width: 36px; height: 36px;
  display: flex; align-items: center; justify-content: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-body);
  color: var(--color-text-body);
  text-decoration: none;
  transition: all 0.2s;
  cursor: pointer;
  background: var(--color-bg-card);
}
.pagination__item:hover { border-color: var(--color-primary); color: var(--color-primary); }
.pagination__item.is-active {
  background-color: var(--color-primary);
  color: #FFFFFF;
  border-color: var(--color-primary);
}
.pagination__item.is-disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* === Steps === */
.steps {
  display: flex;
  justify-content: center;
  gap: var(--space-lg);
  margin-bottom: var(--space-2xl);
  flex-wrap: wrap;
}
.step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  max-width: 160px;
  text-align: center;
}
.step__number {
  width: 48px; height: 48px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: var(--font-size-h4);
  font-weight: var(--font-weight-bold);
  background-color: var(--color-border-light);
  color: var(--color-text-muted);
  transition: all 0.3s;
}
.step.is-active .step__number {
  background-color: var(--color-primary);
  color: #FFFFFF;
}
.step.is-done .step__number {
  background-color: var(--color-success);
  color: #FFFFFF;
}
.step__label {
  font-size: var(--font-size-body);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-muted);
}
.step.is-active .step__label { color: var(--color-primary); }
.step.is-done .step__label { color: var(--color-text-title); }

/* === Onboarding Modal === */
.modal-overlay {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}
.modal-overlay.is-open {
  opacity: 1;
  pointer-events: auto;
}
.modal {
  background-color: var(--color-bg-card);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  max-width: 560px;
  width: 90%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-modal);
  transform: scale(0.95);
  transition: transform 0.25s ease;
}
.modal-overlay.is-open .modal { transform: scale(1); }

/* === Notify Toast === */
.toast {
  position: fixed;
  top: 80px;
  right: 24px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-md) var(--space-lg);
  box-shadow: var(--shadow-card);
  z-index: 3000;
  display: flex;
  align-items: center;
  gap: var(--space-md);
  font-size: var(--font-size-body);
  transform: translateX(120%);
  transition: transform 0.3s ease;
}
.toast.is-visible { transform: translateX(0); }
.toast--success { border-left: 4px solid var(--color-success); }
.toast--error { border-left: 4px solid var(--color-error); }
.toast--info { border-left: 4px solid var(--color-info); }
.toast--warning { border-left: 4px solid var(--color-warning, #FAAD14); }

/* === Notification dot === */
.notification-dot {
  width: 8px; height: 8px;
  background: var(--color-error);
  border-radius: 50%;
  display: inline-block;
}

/* === [P2-5] Additional Responsive Improvements === */

/* Inquiry Cards Responsive */
@media (max-width: 767px) {
  .inquiry-card {
    padding: var(--space-md);
  }
  .inquiry-card__header {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-sm);
  }
  .inquiry-card__header .badge {
    margin-left: 26px;
  }
  .inquiry-product {
    flex-direction: column;
  }
  .inquiry-product__supplier {
    margin-left: 0;
    margin-top: var(--space-sm);
    padding-left: 0;
    border-left: none;
  }
  .inquiry-card__footer {
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-sm);
  }
  .inquiry-actions {
    flex-direction: column;
  }
  .inquiry-actions .btn {
    width: 100%;
    justify-content: center;
  }
}

/* Filter Tabs Responsive */
@media (max-width: 767px) {
  .filter-tabs {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    -ms-overflow-style: none;
    flex-wrap: nowrap;
    padding-bottom: var(--space-xs);
  }
  .filter-tabs::-webkit-scrollbar {
    display: none;
  }
  .filter-tab {
    white-space: nowrap;
    flex-shrink: 0;
  }
}

/* Dashboard Responsive Improvements */
@media (max-width: 575px) {
  .dashboard-stats {
    grid-template-columns: 1fr;
  }
  .stat-card {
    padding: var(--space-md);
  }
  .dashboard-sidebar__nav {
    padding: var(--space-sm);
  }
  .dashboard-sidebar__nav a {
    padding: var(--space-sm) var(--space-md);
  }
}

/* Product Grid Responsive */
@media (max-width: 575px) {
  .product-card__footer {
    flex-direction: column;
  }
  .product-card__footer .btn-sm {
    width: 100%;
    margin: 2px 0;
  }
}

/* Search Page Responsive */
@media (max-width: 575px) {
  .search-hero {
    padding: var(--space-xl) var(--space-md);
  }
  .search-hero h1 {
    font-size: var(--font-size-h2);
  }
  .results-toolbar {
    flex-direction: column;
    align-items: stretch;
  }
  .results-toolbar .view-toggle {
    justify-content: center;
  }
}

/* Buttons Responsive */
@media (max-width: 575px) {
  .btn-lg {
    height: 44px;
    padding: 10px 20px;
    font-size: var(--font-size-body);
  }
  .cta-buttons {
    flex-direction: column;
    align-items: stretch;
  }
  .cta-buttons .btn {
    width: 100%;
    justify-content: center;
  }
}

/* Modal Responsive */
@media (max-width: 575px) {
  .modal {
    padding: var(--space-md);
    margin: var(--space-md);
    width: calc(100% - var(--space-md) * 2);
  }
}

/* Toast Responsive */
@media (max-width: 575px) {
  .toast {
    left: var(--space-md);
    right: var(--space-md);
    top: auto;
    bottom: var(--space-lg);
  }
}

/* Steps Responsive */
@media (max-width: 767px) {
  .steps {
    gap: var(--space-md);
  }
  .step {
    max-width: 100%;
  }
}

/* Footer Responsive */
@media (max-width: 767px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }
  .footer-bottom {
    flex-direction: column;
    gap: var(--space-md);
    text-align: center;
  }
  .footer-links {
    flex-wrap: wrap;
    justify-content: center;
  }
}

/* === [P2-6] Animation & Transition Effects === */

/* Fade In Animation */
@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 fadeInLeft {
  from {
    opacity: 0;
    transform: translateX(-20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

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

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.9);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes slideDown {
  from {
    opacity: 0;
    max-height: 0;
    padding-top: 0;
    padding-bottom: 0;
  }
  to {
    opacity: 1;
    max-height: 1000px;
    padding-top: var(--space-md);
    padding-bottom: var(--space-md);
  }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.6; }
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-5px); }
}

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

/* Animation Classes */
.animate-fade-in {
  animation: fadeIn 0.4s ease-out forwards;
}

.animate-fade-in-up {
  animation: fadeInUp 0.5s ease-out forwards;
}

.animate-fade-in-down {
  animation: fadeInDown 0.5s ease-out forwards;
}

.animate-fade-in-left {
  animation: fadeInLeft 0.5s ease-out forwards;
}

.animate-fade-in-right {
  animation: fadeInRight 0.5s ease-out forwards;
}

.animate-scale-in {
  animation: scaleIn 0.3s ease-out forwards;
}

.animate-slide-down {
  animation: slideDown 0.4s ease-out forwards;
  overflow: hidden;
}

.animate-pulse {
  animation: pulse 2s ease-in-out infinite;
}

.animate-bounce {
  animation: bounce 0.6s ease-in-out infinite;
}

/* Stagger Animation Delays */
.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; }
.stagger-6 { animation-delay: 0.6s; }

/* Skeleton Loading Animation */
.skeleton {
  background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s ease-in-out infinite;
}

.skeleton-text {
  height: 1em;
  border-radius: 4px;
  margin-bottom: 0.5em;
}

.skeleton-text:last-child {
  width: 70%;
}

/* Hover Scale Effect */
.hover-scale {
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.hover-scale:hover {
  transform: scale(1.02);
  box-shadow: var(--shadow-card-hover, 0 8px 24px rgba(0,0,0,0.12));
}

/* Hover Lift Effect */
.hover-lift {
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.hover-lift:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover, 0 8px 24px rgba(0,0,0,0.12));
}

/* Button Press Effect */
.btn-press:active {
  transform: scale(0.96);
  transition: transform 0.1s ease;
}

/* Ripple Effect */
.ripple {
  position: relative;
  overflow: hidden;
}
.ripple::after {
  content: '';
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  pointer-events: none;
  background-image: radial-gradient(circle, var(--color-primary) 10%, transparent 10%);
  background-repeat: no-repeat;
  background-position: 50%;
  transform: scale(10);
  opacity: 0;
  transition: transform 0.5s, opacity 0.8s;
}
.ripple:active::after {
  transform: scale(0);
  opacity: 0.3;
  transition: 0s;
}

/* Card Entrance Animation */
.card-enter {
  opacity: 0;
  transform: translateY(10px);
}
.card-enter.card-enter-active {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.3s ease, transform 0.3s ease;
}

/* Smooth Scroll */
html {
  scroll-behavior: smooth;
}

/* Page Transition */
.page-transition {
  animation: fadeIn 0.3s ease-out;
}

/* Badge Pop Animation */
.badge-pop {
  animation: bounce 0.4s ease;
}

/* Tab Transition */
.tab-content {
  animation: fadeIn 0.3s ease-out;
}

/* Focus Ring Animation */
*:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  animation: pulse 1s ease-in-out 2;
}

/* Loading Spinner */
.spinner {
  width: 24px;
  height: 24px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

.spinner-sm {
  width: 16px;
  height: 16px;
  border-width: 2px;
}

.spinner-lg {
  width: 40px;
  height: 40px;
  border-width: 4px;
}

/* === Header Cart Button & Badge === */
.header-cart-btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  color: var(--color-text-body);
  text-decoration: none;
  transition: background-color 0.2s;
}
.header-cart-btn:hover {
  background-color: var(--color-bg-section);
}
.cart-badge {
  position: absolute;
  top: -4px;
  right: -4px;
  width: 18px;
  height: 18px;
  background: var(--color-accent);
  color: #fff;
  font-size: 10px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
}
.cart-badge[style*="display: flex"] {
  display: flex !important;
}