/* CSS Variables - Design System */
:root {
  /* Color System */
  --color-primary: #FF0000;
  --color-surface-bg: #F9E9E9;
  --color-accent: rgb(220, 38, 38);
  --color-muted: #6b6560;
  --color-primary-light: #FF0000;
  --color-primary-main: #CC0000;
  --color-primary-dark: #990000;
  --color-page-bg: #FDFBF8;
  --color-border: #EAE7E2;
  --color-text-secondary: #6B645D;
  --color-text: #2C2825;
  /* Typography */
  --font-family-heading: 'Prompt', sans-serif;
  --font-family-base: 'Sarabun', sans-serif;
  --line-height-base: 1.7;
  --font-size-base: 18px;
  /* Layout */
  --max-width: 1280px;
  --border-radius: 8px;
  --shadow: 0 4px 12px rgba(44, 40, 37, 0.08);
  --shadow-hover: 0 8px 24px rgba(44, 40, 37, 0.12);
  /* Transitions */
  --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}
body {
  background: var(--color-page-bg, #FDFBF8);
  background-image: linear-gradient(rgba(208, 0, 0, 0.03) 1px, transparent 1px), linear-gradient(90deg, rgba(208, 0, 0, 0.03) 1px, transparent 1px);
  background-size: 40px 40px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
/* Header */
.header {
  background: var(--color-surface-bg);
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 1001;
}
.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) 0;
}
.header-content .logo {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  text-decoration: none;
  line-height: 1.4;
}
.header-content .logo::before {
  content: '';
  background-image: var(--logo);
  height: 3.6rem;
  min-width: 3.6rem;
  background-size: cover;
  background-position: center;
}
.logo-text {
  font-size: 1.5rem;
}
.logo-subtitle {
  color: var(--color-text-secondary);
  margin: 0;
}
.search-input,
.logo-subtitle,
.logo-text {
  display: -webkit-box;
  -webkit-box-orient: vertical;
  text-overflow: ellipsis;
  overflow: hidden;
  -webkit-line-clamp: 1;
}
.topmenu > ul > li > button,
.topmenu > ul > li > a,
.header .logo::before {
  border-radius: var(--border-radius);
}
.topmenu li:not(.menu-close):hover > button:not(.active),
.topmenu li:hover > a:not(.active),
.topmenu li.select {
  color: var(--color-accent);
  background-color: transparent;
}
/* Container */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-6);
}
.page-detail:not(:empty) {
  padding: 2.5rem 0;
}
.hero {
  background-image: linear-gradient(135deg, var(--color-primary-light) 0%, var(--color-primary-main) 50%, var(--color-primary-dark) 100%);
  color: white;
  padding: var(--space-16, 64px) 0;
  text-align: center;
  margin-bottom: var(--space-12, 48px);
}
.hero-title {
  font-weight: 700;
  margin: 0 0 .5rem;
}
.hero-subtitle {
  font-size: 1rem;
  opacity: .85;
  margin: 0;
}
.page-content section {
  background: var(--color-background);
  border-radius: var(--border-radius, 8px);
  padding: var(--space-8, 32px);
  margin-bottom: var(--space-8, 32px);
  box-shadow: var(--shadow, 0 4px 12px rgba(44, 40, 37, 0.08));
}
.home .hero {
  height: 60vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  background-size: cover;
}
.home {
  padding-bottom: var(--space-16, 64px);
}
.home-layout {
  align-items: start;
}
.home-highlight {
  margin: calc(var(--space-12, 48px) * -1) 0 var(--space-10, 40px);
  position: relative;
  z-index: 2;
}
.home-highlight__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) repeat(2, minmax(0, 1fr));
  gap: var(--space-6, 24px);
}
.home-highlight__card,
.home-panel,
.home-section {
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid rgba(255, 255, 255, 0.6);
  border-radius: 24px;
  box-shadow: 0 24px 60px rgba(44, 40, 37, 0.08);
  backdrop-filter: blur(10px);
}
.home-highlight__card {
  padding: var(--space-8, 32px);
}
.home-highlight__card--feature {
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.96) 0%, rgba(255, 246, 246, 0.94) 100%);
}
.home-highlight__card h2,
.home-highlight__card h3,
.home-panel h3,
.home-section__header h2 {
  margin-top: 0;
  color: var(--color-text);
}
.home-highlight__card h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.15;
  margin-bottom: var(--space-4, 16px);
}
.home-highlight__card p,
.home-panel__intro,
.home-section__header p,
.home-mini-list span {
  color: var(--color-text-secondary);
}
.home-highlight__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3, 12px);
  margin-top: var(--space-6, 24px);
}
.home-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 46px;
  padding: 0 20px;
  border-radius: 999px;
  border: 1px solid rgba(204, 0, 0, 0.16);
  color: var(--color-primary-main);
  background: rgba(255, 255, 255, 0.84);
  text-decoration: none;
  font-weight: 700;
  transition: var(--transition);
}
.home-action:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-hover);
}
.home-action--primary {
  background: linear-gradient(135deg, var(--color-primary-light) 0%, var(--color-primary-main) 100%);
  color: #fff;
}
.home-stat {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 72px;
  padding: 8px 14px;
  border-radius: 999px;
  background: rgba(204, 0, 0, 0.08);
  color: var(--color-primary-main);
  font-weight: 800;
  margin-bottom: var(--space-4, 16px);
}
.home-section-label {
  display: inline-block;
  font-size: 0.82rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-primary-main);
  margin-bottom: var(--space-3, 12px);
}
.home-content {
  display: grid;
  gap: var(--space-8, 32px);
}
.home-sidebar {
  display: grid;
  gap: var(--space-6, 24px);
}
.home-panel {
  padding: var(--space-6, 24px);
}
.home-panel--accent {
  background: linear-gradient(180deg, rgba(255, 246, 246, 0.98) 0%, rgba(255, 255, 255, 0.94) 100%);
}
.home-panel--soft {
  background: rgba(255, 255, 255, 0.88);
}
.home-panel__header,
.home-section__header {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: var(--space-4, 16px);
  margin-bottom: var(--space-5, 20px);
}
.home-panel__header h3,
.home-section__header h2 {
  margin-bottom: 0;
}
.home-mini-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-4, 16px);
}
.home-mini-list li {
  padding: 16px 18px;
  border-radius: 18px;
  background: rgba(249, 233, 233, 0.56);
  border: 1px solid rgba(204, 0, 0, 0.08);
}
.home-mini-list strong,
.home-mini-list span {
  display: block;
}
.home-mini-list strong {
  margin-bottom: 6px;
  color: var(--color-text);
}
.home-banner-wrap:empty {
  display: none;
}
.home-banner-wrap,
.home-section {
  overflow: hidden;
}
.home-section {
  padding: var(--space-8, 32px);
}
.home-section--main {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.96) 0%, rgba(255, 250, 250, 0.92) 100%);
}
.home-section--knowledge {
  background: rgba(255, 255, 255, 0.96);
}
.home-section__content > :last-child {
  margin-bottom: 0;
}
@media (max-width: 1120px) {
  .home-highlight__grid {
    grid-template-columns: 1fr 1fr;
  }
  .home-highlight__card--feature {
    grid-column: 1 / -1;
  }
}
@media (max-width: 768px) {
  .home {
    padding-bottom: var(--space-10, 40px);
  }
  .home .hero {
    min-height: 52vh;
    height: auto;
    padding: var(--space-12, 48px) var(--space-6, 24px);
  }
  .home-highlight {
    margin-top: calc(var(--space-8, 32px) * -1);
  }
  .home-highlight__grid,
  .home-content,
  .home-sidebar {
    grid-template-columns: 1fr;
  }
  .home-panel__header,
  .home-section__header {
    flex-direction: column;
    align-items: flex-start;
  }
}
@media (max-width: 480px) {
  .container {
    padding: 0 var(--space-4, 16px);
  }
  .home-highlight__card,
  .home-panel,
  .home-section {
    border-radius: 20px;
    padding: var(--space-6, 24px);
  }
  .home-highlight__actions {
    flex-direction: column;
  }
  .home-action {
    width: 100%;
  }
}
/* Footer */
.footer {
  background: var(--color-text);
  color: white;
  padding-top: var(--space-24);
}
.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-12);
  margin-bottom: var(--space-12);
}
.footer-title {
  color: white;
  margin-bottom: var(--space-6);
}
.footer-links {
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.footer-links span,
.footer-links a {
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
  transition: var(--transition);
  display: flex;
}
.footer-links a:hover {
  color: white;
}
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.2);
}
.footer-bottom p {
  margin-bottom: 0;
  padding: var(--space-8) 0;
  text-align: center;
  color: rgba(255, 255, 255, 0.6);
}
/* Error Container (RouterManager default 404) */
.error-container {
  min-height: calc(100vh - 200px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-24) var(--space-6);
  background: linear-gradient(135deg, var(--color-page-bg) 0%, var(--color-surface-bg) 100%);
}
.error-card {
  background: white;
  border-radius: var(--border-radius);
  padding: var(--space-16);
  box-shadow: var(--shadow-hover);
  text-align: center;
  max-width: 560px;
  width: 100%;
  border-top: 4px solid var(--color-primary);
}
.error-code-number {
  font-family: var(--font-heading);
  font-size: 120px;
  font-weight: 900;
  line-height: 1;
  margin-bottom: var(--space-4);
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-main) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.error-card .error-message {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-8);
}
.error-details {
  background: var(--color-surface-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  padding: var(--space-4);
  margin-bottom: var(--space-8);
  text-align: left;
}
.error-code-heading {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 4px;
}
.error-code {
  font-family: monospace;
  font-size: var(--font-size-sm);
  color: var(--color-primary);
  background: transparent;
  border: none;
  padding: 0;
  margin: 0;
  white-space: pre-wrap;
  word-break: break-all;
}
.error-actions {
  display: flex;
  gap: var(--space-4);
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: var(--space-8);
}
.error-actions .btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px var(--space-6);
  border-radius: var(--border-radius);
  font-family: var(--font-body);
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: var(--transition);
  text-decoration: none;
}
.error-actions .btn-primary {
  background: var(--color-primary);
  color: white;
}
.error-actions .btn-primary:hover {
  background: var(--color-accent);
  box-shadow: var(--shadow-hover);
}
.error-actions .btn-secondary {
  background: var(--color-surface-bg);
  color: var(--color-primary-main);
  border: 1px solid var(--color-border);
}
.error-actions .btn-secondary:hover {
  background: var(--color-border);
  box-shadow: var(--shadow);
}
.error-help {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  font-style: italic;
  line-height: 1.6;
}
@media (max-width: 768px) {
  .error-card {
    padding: var(--space-8);
  }
  .error-code-number {
    font-size: 80px;
  }
  .error-actions {
    flex-direction: column;
  }
  .error-actions .btn {
    justify-content: center;
  }
}
/* Category Buttons */
.category-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  padding: .5rem 0 1rem;
  border-bottom: 2px solid #e5e7eb;
}
.cat-link {
  display: inline-block;
  padding: .45rem 1.1rem;
  border-radius: 999px;
  background: #f3f4f6;
  color: #374151;
  font-size: .9rem;
  text-decoration: none;
  transition: background .2s, color .2s;
  border: 1.5px solid transparent;
}
.cat-link:hover {
  background: #dbeafe;
  color: var(--color-primary, #2563eb);
}
.cat-link.active {
  background: var(--color-primary, #2563eb);
  color: #fff;
  border-color: var(--color-primary, #2563eb);
}
@media (max-width: 480px) {
  .cat-link {
    font-size: .8rem;
    padding: 5px 12px;
  }
}
/* Pagination */
.pagination-wrapper:not(:empty) {
  display: flex;
  justify-content: center;
  padding: 2rem 0 4rem;
}
/* =====================================
   AUTH PAGES (Login, Register, etc.)
   ===================================== */
.auth-container {
  min-height: 60vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-6);
  background: linear-gradient(135deg, var(--color-primary-light) 0%, var(--color-primary-main) 50%, var(--color-primary-dark) 100%);
  position: relative;
  overflow: hidden;
}
.auth-card {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 480px;
  background: var(--color-surface-bg);
  border-radius: var(--border-radius);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
  overflow: hidden;
  animation: slideUp 0.4s ease-out;
}
.auth-form {
  padding: var(--space-12);
}
.auth-header {
  text-align: center;
  margin-bottom: var(--space-8);
}
.auth-logo {
  display: inline-block;
  width: 80px;
  height: 80px;
  margin-bottom: var(--space-6);
  background-color: var(--color-primary-main);
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  border-radius: 50%;
  box-shadow: 0 4px 12px rgba(41, 51, 107, 0.2);
  background-image: var(--logo);
}
.auth-header h1 {
  font-size: 28px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}
.auth-header h2 {
  font-size: 24px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}
.login-message {
  color: var(--color-text-secondary);
  font-size: 15px;
  margin-bottom: 0;
}
.social-divider {
  position: relative;
  text-align: center;
  margin: var(--space-8) 0;
}
.social-divider::before,
.social-divider::after {
  content: '';
  position: absolute;
  top: 50%;
  width: calc(50% - 60px);
  height: 1px;
  background: var(--color-border);
}
.social-divider::before {
  left: 0;
}
.social-divider::after {
  right: 0;
}
.social-divider span {
  background: var(--color-surface-bg);
  padding: 0 var(--space-4);
  color: var(--color-text-secondary);
  font-size: 14px;
  position: relative;
  z-index: 1;
}
.social-login-buttons {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  justify-content: center;
}
.social-login-buttons .btn {
  flex: 1;
  min-width: 100%;
  background: var(--color-surface-bg);
  border: 2px solid var(--color-border);
  color: var(--color-text);
  font-weight: 500;
}
.social-login-buttons .btn:hover {
  background: var(--color-page-bg);
  border-color: var(--color-primary-main);
  transform: none;
}
.userinfo > span > .icon-facebook:before,
.social-login-buttons .icon-facebook {
  border-color: #1877f2;
  color: #1877f2;
}
.social-login-buttons .icon-facebook:hover {
  background: #1877f2;
  color: white;
  border-color: #1877f2;
}
.userinfo > span > .icon-line:before,
.social-login-buttons .icon-line {
  border-color: #00b900;
  color: #00b900;
}
.social-login-buttons .icon-line:hover {
  background: #00b900;
  color: white;
  border-color: #00b900;
}
.userinfo > span > .icon-google:before {
  color: #db4437;
}
.userinfo > span > .icon-telegram:before {
  color: #2ca5e0;
}
.auth-form a {
  color: var(--color-primary);
}
.profile {
  padding: 0 0 var(--space-12, 48px) 0;
}
.profile fieldset legend {
  font-size: var(--font-size-3xl);
}