/*
Theme Name: XSClean
Theme URI: https://kqxsmt.com
Author: XSClean Team
Author URI: https://kqxsmt.com
Description: WordPress theme tối ưu cho website kết quả xổ số miền Trung & Tây Nguyên. Mobile-first, SEO-friendly, tốc độ cao.
Version: 1.0.0
Requires at least: 6.0
Tested up to: 6.7
Requires PHP: 8.0
License: GNU General Public License v2 or later
License URI: https://www.gnu.org/licenses/gpl-2.0.html
Text Domain: xsclean
Tags: lottery, news, responsive, custom-colors, custom-logo, custom-menu, featured-images, threaded-comments, translation-ready
*/

/* ========================================
   CSS CUSTOM PROPERTIES (DESIGN TOKENS)
   ======================================== */
:root {
  /* Colors */
  --color-primary: #1a56db;
  --color-primary-hover: #1e429f;
  --color-primary-light: #e8f0fe;
  --color-accent: #e3a008;
  --color-accent-light: #fef3c7;
  --color-success: #057a55;
  --color-success-light: #def7ec;
  --color-danger: #c81e1e;
  --color-danger-light: #fde8e8;
  --color-warning: #d97706;
  --color-bg: #f9fafb;
  --color-surface: #ffffff;
  --color-surface-2: #f3f4f6;
  --color-text: #111827;
  --color-text-secondary: #6b7280;
  --color-text-muted: #9ca3af;
  --color-border: #e5e7eb;
  --color-border-strong: #d1d5db;

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'Courier New', Courier, monospace;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --line-height-tight: 1.2;
  --line-height-base: 1.7;

  /* Spacing */
  --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;

  /* Layout */
  --container-max: 1200px;
  --sidebar-width: 320px;
  --header-height: 64px;

  /* Borders */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-pill: 20px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 4px 6px rgba(0, 0, 0, 0.07), 0 2px 4px rgba(0, 0, 0, 0.06);
  --shadow-xl: 0 10px 15px rgba(0, 0, 0, 0.1), 0 4px 6px rgba(0, 0, 0, 0.05);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 350ms ease;
}

/* Dark Mode */
@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #111827;
    --color-surface: #1f2937;
    --color-surface-2: #374151;
    --color-text: #f9fafb;
    --color-text-secondary: #9ca3af;
    --color-text-muted: #6b7280;
    --color-border: #374151;
    --color-border-strong: #4b5563;
    --color-primary-light: #1e3a5f;
    --color-accent-light: #3d2500;
    --color-success-light: #052e1c;
    --color-danger-light: #3b0b0b;
    --shadow-md: 0 1px 3px rgba(0, 0, 0, 0.3), 0 1px 2px rgba(0, 0, 0, 0.2);
  }
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

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

/* Skip to content */
.skip-to-content {
  position: absolute;
  top: -100%;
  left: var(--space-4);
  z-index: 9999;
  padding: var(--space-3) var(--space-5);
  background: var(--color-primary);
  color: #fff;
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  font-weight: 600;
  text-decoration: none;
  transition: top var(--transition-fast);
}

.skip-to-content:focus {
  top: 0;
}

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

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

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

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

ul, ol {
  list-style: none;
}

button {
  cursor: pointer;
  font-family: inherit;
}

/* ========================================
   LAYOUT
   ======================================== */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-4);
}

@media (min-width: 768px) {
  .container {
    padding-inline: var(--space-6);
  }
}

@media (min-width: 1200px) {
  .container {
    padding-inline: var(--space-8);
  }
}

.site-wrapper {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.site-main {
  flex: 1;
  padding-top: var(--space-6);
  padding-bottom: var(--space-8);
}

.content-area {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
}

@media (min-width: 1024px) {
  .content-area {
    grid-template-columns: 1fr var(--sidebar-width);
  }
}

/* ========================================
   TYPOGRAPHY
   ======================================== */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: var(--line-height-tight);
  color: var(--color-text);
}

h1 { font-size: var(--font-size-3xl); }
h2 { font-size: var(--font-size-2xl); }
h3 { font-size: var(--font-size-xl); }
h4 { font-size: var(--font-size-lg); }
h5 { font-size: var(--font-size-base); }
h6 { font-size: var(--font-size-sm); }

@media (min-width: 768px) {
  h1 { font-size: var(--font-size-4xl); }
  h2 { font-size: var(--font-size-3xl); }
}

p { margin-bottom: var(--space-4); }

p:last-child { margin-bottom: 0; }

/* ========================================
   COMPONENTS
   ======================================== */

/* Card */
.card {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-md);
  overflow: hidden;
}

.card-header {
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}

.card-title {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-text);
}

.card-body {
  padding: var(--space-5);
}

/* Badge */
.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-pill);
  font-size: var(--font-size-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.badge-primary { background: var(--color-primary-light); color: var(--color-primary); }
.badge-accent { background: var(--color-accent-light); color: var(--color-warning); }
.badge-success { background: var(--color-success-light); color: var(--color-success); }
.badge-danger { background: var(--color-danger-light); color: var(--color-danger); }

/* Button */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-5);
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  font-weight: 600;
  line-height: 1.5;
  text-align: center;
  white-space: nowrap;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

.btn-primary:hover {
  background: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
  color: #fff;
}

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn-outline:hover {
  background: var(--color-primary);
  color: #fff;
}

.btn-ghost {
  background: transparent;
  color: var(--color-text-secondary);
  border-color: var(--color-border);
}

.btn-ghost:hover {
  background: var(--color-surface-2);
  color: var(--color-text);
}

.btn-sm {
  padding: var(--space-1) var(--space-3);
  font-size: var(--font-size-xs);
}

/* ========================================
   HEADER
   ======================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  height: var(--header-height);
}

/* WordPress Admin Bar support */
.admin-bar .site-header {
  top: 32px;
}

@media screen and (max-width: 782px) {
  .admin-bar .site-header {
    top: 46px;
  }
}

.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.site-logo {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
}

.logo-text {
  font-size: var(--font-size-xl);
  font-weight: 800;
  color: var(--color-primary);
  letter-spacing: -0.02em;
}

.logo-tagline {
  display: none;
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
  line-height: 1.3;
}

@media (min-width: 768px) {
  .logo-tagline { display: block; }
}

.main-nav {
  display: none;
  flex: 1;
}

@media (min-width: 1024px) {
  .main-nav { display: flex; }
}

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

.nav-list a {
  display: block;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
}

.nav-list a:hover,
.nav-list .current-menu-item a {
  background: var(--color-primary-light);
  color: var(--color-primary);
}

.header-actions {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

/* Header Search */
.header-search {
  position: relative;
}

.header-search-input {
  width: 200px;
  padding: var(--space-2) var(--space-3);
  padding-right: var(--space-8);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  font-size: var(--font-size-sm);
  background: var(--color-bg);
  color: var(--color-text);
  transition: all var(--transition-fast);
}

.header-search-input:focus {
  outline: none;
  border-color: var(--color-primary);
  background: var(--color-surface);
  width: 280px;
  box-shadow: 0 0 0 3px rgba(26, 86, 219, 0.1);
}

@media (max-width: 767px) {
  .header-search { display: none; }
}

.header-search-btn {
  position: absolute;
  right: var(--space-3);
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--color-text-secondary);
  padding: 0;
  line-height: 1;
}

/* Hamburger */
.hamburger {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-2);
  cursor: pointer;
}

@media (min-width: 1024px) {
  .hamburger { display: none; }
}

.hamburger span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-text);
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
}

/* Mobile Menu */
.mobile-menu {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(0, 0, 0, 0.5);
}

.mobile-menu.is-open {
  display: block;
}

.mobile-menu-inner {
  position: absolute;
  top: 0;
  left: 0;
  width: 280px;
  height: 100%;
  background: var(--color-surface);
  padding: var(--space-6);
  overflow-y: auto;
  transform: translateX(-100%);
  transition: transform var(--transition-base);
}

.mobile-menu.is-open .mobile-menu-inner {
  transform: translateX(0);
}

.mobile-menu-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-border);
}

.mobile-menu-close {
  background: none;
  border: none;
  font-size: var(--font-size-xl);
  color: var(--color-text-secondary);
  cursor: pointer;
  padding: var(--space-1);
}

.mobile-nav-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.mobile-nav-list a {
  display: block;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  font-weight: 500;
  color: var(--color-text);
  transition: all var(--transition-fast);
}

.mobile-nav-list a:hover {
  background: var(--color-primary-light);
  color: var(--color-primary);
}

/* ========================================
   BREADCRUMB
   ======================================== */
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-2);
  padding: var(--space-3) 0;
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-6);
}

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

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

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

.breadcrumb-current {
  color: var(--color-text);
  font-weight: 500;
}

/* ========================================
   KQXS TABLE (LOTTERY RESULTS)
   ======================================== */
.kqxs-wrapper {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.kqxs-header {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-hover) 100%);
  padding: var(--space-5) var(--space-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.kqxs-title {
  color: #fff;
  font-size: var(--font-size-xl);
  font-weight: 700;
}

.kqxs-subtitle {
  color: rgba(255, 255, 255, 0.8);
  font-size: var(--font-size-sm);
  margin-top: var(--space-1);
}

.kqxs-actions {
  display: flex;
  gap: var(--space-2);
}

.kqxs-actions .btn {
  background: rgba(255,255,255,0.15);
  color: #fff;
  border-color: rgba(255,255,255,0.3);
  backdrop-filter: blur(4px);
}

.kqxs-actions .btn:hover {
  background: rgba(255,255,255,0.25);
  color: #fff;
}

.kqxs-table {
  width: 100%;
  border-collapse: collapse;
  font-variant-numeric: tabular-nums;
}

.kqxs-table thead {
  background: var(--color-surface-2);
}

.kqxs-table th {
  padding: var(--space-3) var(--space-4);
  text-align: center;
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 2px solid var(--color-border);
}

.kqxs-table th:first-child {
  text-align: left;
  width: 100px;
}

.kqxs-table td {
  padding: var(--space-3) var(--space-4);
  text-align: center;
  border-bottom: 1px solid var(--color-border);
  font-size: var(--font-size-base);
  font-family: var(--font-sans);
  font-variant-numeric: tabular-nums;
  vertical-align: middle;
}

.kqxs-table td:first-child {
  text-align: left;
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text-secondary);
  white-space: nowrap;
}

.kqxs-table tr:last-child td {
  border-bottom: none;
}

.kqxs-table tr:hover td {
  background: var(--color-bg);
}

/* Giải đặc biệt */
.giai-db td {
  background: var(--color-accent-light) !important;
}

.giai-db td:first-child {
  color: var(--color-danger) !important;
  font-weight: 800;
}

.so-giai-db {
  font-size: var(--font-size-3xl) !important;
  font-weight: 900;
  color: var(--color-danger);
  letter-spacing: 0.08em;
  text-shadow: 0 1px 2px rgba(200, 30, 30, 0.2);
}

@media (min-width: 768px) {
  .so-giai-db {
    font-size: var(--font-size-4xl) !important;
  }
}

/* Số trong bảng */
.so-xo {
  display: inline-block;
  font-weight: 600;
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  min-width: 44px;
  text-align: center;
  letter-spacing: 0.05em;
}

.so-xo:hover {
  background: var(--color-primary-light);
  color: var(--color-primary);
}

/* Responsive KQXS Table */
@media (max-width: 767px) {
  .kqxs-table {
    display: block;
  }

  .kqxs-table thead { display: none; }

  .kqxs-table tbody { display: block; }

  .kqxs-table tr {
    display: grid;
    grid-template-columns: 80px 1fr;
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-2) 0;
  }

  .kqxs-table td {
    border-bottom: none;
    padding: var(--space-2) var(--space-3);
  }

  .kqxs-table td:first-child {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    padding-left: var(--space-4);
  }

  .kqxs-table td:not(:first-child) {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: flex-start;
    gap: var(--space-2);
  }

  .so-giai-db {
    font-size: var(--font-size-2xl) !important;
  }
}

/* Skeleton Loading */
.kqxs-skeleton {
  animation: skeleton-pulse 1.5s ease-in-out infinite;
}

.skeleton-row {
  height: 48px;
  background: var(--color-surface-2);
  margin-bottom: 1px;
}

.skeleton-cell {
  height: 24px;
  background: var(--color-border);
  border-radius: var(--radius-sm);
  display: inline-block;
}

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

/* ========================================
   SIDEBAR
   ======================================== */
.sidebar {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.widget {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.widget-title {
  padding: var(--space-4) var(--space-5);
  font-size: var(--font-size-base);
  font-weight: 700;
  color: var(--color-text);
  border-bottom: 2px solid var(--color-primary);
  background: var(--color-surface-2);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.widget-title::before {
  content: '';
  display: inline-block;
  width: 4px;
  height: 16px;
  background: var(--color-primary);
  border-radius: var(--radius-full);
  flex-shrink: 0;
}

.widget-body {
  padding: var(--space-4) var(--space-5);
}

/* Lịch xổ số widget */
.lich-xoso-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--font-size-sm);
}

.lich-xoso-table th,
.lich-xoso-table td {
  padding: var(--space-2) var(--space-3);
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}

.lich-xoso-table th {
  font-weight: 600;
  color: var(--color-text-secondary);
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.lich-xoso-table td:last-child {
  font-weight: 500;
  color: var(--color-primary);
}

.lich-today td {
  background: var(--color-primary-light);
  font-weight: 600;
}

/* Tỉnh lẻ nhanh widget */
.tinh-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2);
}

.tinh-link {
  display: block;
  padding: var(--space-2) var(--space-3);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text);
  text-align: center;
  transition: all var(--transition-fast);
  text-decoration: none;
}

.tinh-link:hover {
  background: var(--color-primary-light);
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* Soi cầu widget */
.soicau-numbers {
  display: flex;
  gap: var(--space-3);
  justify-content: center;
  margin-bottom: var(--space-4);
}

.soicau-num {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  font-size: var(--font-size-xl);
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
}

.soicau-num-1 { background: var(--color-danger); color: #fff; }
.soicau-num-2 { background: var(--color-primary); color: #fff; }
.soicau-num-3 { background: var(--color-accent); color: #fff; }

/* ========================================
   PAGE HEADER
   ======================================== */
.page-hero {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-hover) 100%);
  padding: var(--space-10) 0;
  margin-bottom: var(--space-8);
}

.page-hero-inner {
  color: #fff;
}

.page-hero h1 {
  color: #fff;
  margin-bottom: var(--space-2);
}

.page-hero-meta {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-wrap: wrap;
  color: rgba(255, 255, 255, 0.8);
  font-size: var(--font-size-sm);
}

/* ========================================
   SECTION TITLES
   ======================================== */
.section-title {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--font-size-xl);
  font-weight: 700;
  margin-bottom: var(--space-5);
  padding-bottom: var(--space-3);
  border-bottom: 2px solid var(--color-border);
}

.section-title-accent {
  width: 4px;
  height: 24px;
  background: var(--color-primary);
  border-radius: var(--radius-full);
  flex-shrink: 0;
}

/* ========================================
   STAT CARDS
   ======================================== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
  margin-bottom: var(--space-8);
}

.stat-card {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  padding: var(--space-5);
  text-align: center;
}

.stat-number {
  font-size: var(--font-size-3xl);
  font-weight: 800;
  color: var(--color-primary);
  font-variant-numeric: tabular-nums;
  display: block;
  line-height: 1;
  margin-bottom: var(--space-2);
}

.stat-label {
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ========================================
   COLLAPSIBLE SECTION
   ======================================== */
.collapsible {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: var(--space-5);
}

.collapsible-trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-5);
  background: var(--color-surface-2);
  border: none;
  cursor: pointer;
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--color-text);
  text-align: left;
  transition: background var(--transition-fast);
}

.collapsible-trigger:hover {
  background: var(--color-primary-light);
  color: var(--color-primary);
}

.collapsible-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  transition: transform var(--transition-fast);
}

.collapsible.is-open .collapsible-icon {
  transform: rotate(180deg);
}

.collapsible-content {
  display: none;
  padding: var(--space-5);
  background: var(--color-surface);
}

.collapsible.is-open .collapsible-content {
  display: block;
}

/* ========================================
   SOICAU PAGE
   ======================================== */
.prediction-grid {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
  margin-bottom: var(--space-6);
}

.prediction-number {
  flex: 1;
  min-width: 80px;
  text-align: center;
  padding: var(--space-5);
  border-radius: var(--radius-lg);
  border: 2px solid var(--color-border);
}

.prediction-number.hot {
  background: var(--color-danger-light);
  border-color: var(--color-danger);
}

.prediction-number.warm {
  background: var(--color-accent-light);
  border-color: var(--color-accent);
}

.prediction-number.cool {
  background: var(--color-primary-light);
  border-color: var(--color-primary);
}

.prediction-num-value {
  font-size: var(--font-size-4xl);
  font-weight: 900;
  display: block;
  font-variant-numeric: tabular-nums;
}

.prediction-number.hot .prediction-num-value { color: var(--color-danger); }
.prediction-number.warm .prediction-num-value { color: var(--color-warning); }
.prediction-number.cool .prediction-num-value { color: var(--color-primary); }

.prediction-label {
  font-size: var(--font-size-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-secondary);
  margin-top: var(--space-2);
  display: block;
}

/* Frequency table */
.freq-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--font-size-sm);
  font-variant-numeric: tabular-nums;
}

.freq-table th {
  padding: var(--space-2) var(--space-3);
  text-align: center;
  background: var(--color-surface-2);
  font-weight: 600;
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
}

.freq-table td {
  padding: var(--space-2) var(--space-3);
  text-align: center;
  border: 1px solid var(--color-border);
}

.freq-hot { background: var(--color-danger-light); font-weight: 700; color: var(--color-danger); }
.freq-warm { background: var(--color-accent-light); font-weight: 600; color: var(--color-warning); }

/* ========================================
   POST CONTENT
   ======================================== */
.entry-content {
  max-width: none;
}

.entry-content h2,
.entry-content h3,
.entry-content h4 {
  margin-top: var(--space-8);
  margin-bottom: var(--space-4);
}

.entry-content h2:first-child,
.entry-content h3:first-child {
  margin-top: 0;
}

.entry-content ul,
.entry-content ol {
  margin-bottom: var(--space-4);
  padding-left: var(--space-6);
}

.entry-content ul { list-style: disc; }
.entry-content ol { list-style: decimal; }

.entry-content li {
  margin-bottom: var(--space-2);
  line-height: var(--line-height-base);
}

.entry-content blockquote {
  margin: var(--space-6) 0;
  padding: var(--space-4) var(--space-6);
  border-left: 4px solid var(--color-primary);
  background: var(--color-primary-light);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  font-style: italic;
  color: var(--color-text-secondary);
}

.entry-content table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: var(--space-6);
  font-size: var(--font-size-sm);
}

.entry-content table th,
.entry-content table td {
  padding: var(--space-3) var(--space-4);
  text-align: left;
  border: 1px solid var(--color-border);
}

.entry-content table th {
  background: var(--color-surface-2);
  font-weight: 600;
}

.entry-content table tr:hover td {
  background: var(--color-bg);
}

/* ========================================
   POST CARD (Archive/Search)
   ======================================== */
.post-list {
  display: grid;
  gap: var(--space-5);
}

.post-card {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  overflow: hidden;
  transition: box-shadow var(--transition-fast), transform var(--transition-fast);
}

.post-card:hover {
  box-shadow: var(--shadow-xl);
  transform: translateY(-2px);
}

@media (min-width: 768px) {
  .post-card {
    display: grid;
    grid-template-columns: 200px 1fr;
  }
}

.post-card-thumbnail {
  aspect-ratio: 16/9;
  overflow: hidden;
}

@media (min-width: 768px) {
  .post-card-thumbnail {
    aspect-ratio: auto;
  }
}

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

.post-card:hover .post-card-thumbnail img {
  transform: scale(1.05);
}

.post-card-body {
  padding: var(--space-5);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.post-card-meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.post-card-title {
  font-size: var(--font-size-lg);
  font-weight: 700;
  margin-bottom: var(--space-3);
  line-height: 1.4;
}

.post-card-title a {
  color: var(--color-text);
}

.post-card-title a:hover {
  color: var(--color-primary);
}

.post-card-excerpt {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ========================================
   PAGINATION
   ======================================== */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  margin-top: var(--space-10);
}

.pagination a,
.pagination span {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  font-weight: 600;
  text-decoration: none;
  transition: all var(--transition-fast);
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
}

.pagination a:hover {
  background: var(--color-primary-light);
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.pagination .current {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

/* ========================================
   FOOTER
   ======================================== */
.site-footer {
  background: var(--color-text);
  color: rgba(255, 255, 255, 0.7);
  margin-top: auto;
}

.footer-main {
  padding: var(--space-12) 0 var(--space-8);
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
}

@media (min-width: 768px) {
  .footer-main {
    grid-template-columns: 2fr 1fr 1fr;
  }
}

.footer-brand h3 {
  color: #fff;
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-3);
}

.footer-brand p {
  font-size: var(--font-size-sm);
  line-height: 1.7;
  margin-bottom: var(--space-4);
}

.footer-col h4 {
  color: #fff;
  font-size: var(--font-size-sm);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-4);
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.footer-col ul a {
  color: rgba(255, 255, 255, 0.6);
  font-size: var(--font-size-sm);
  transition: color var(--transition-fast);
}

.footer-col ul a:hover {
  color: #fff;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: var(--space-5) 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-3);
  font-size: var(--font-size-sm);
}

.footer-disclaimer {
  background: rgba(0, 0, 0, 0.2);
  padding: var(--space-4) var(--space-5);
  border-radius: var(--radius-md);
  font-size: var(--font-size-xs);
  color: rgba(255, 255, 255, 0.5);
  margin-bottom: var(--space-6);
  border-left: 3px solid var(--color-accent);
}

/* Back to top */
.back-to-top {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  width: 44px;
  height: 44px;
  background: var(--color-primary);
  color: #fff;
  border: none;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: var(--shadow-lg);
  transition: all var(--transition-fast);
  opacity: 0;
  pointer-events: none;
  z-index: 50;
}

.back-to-top.is-visible {
  opacity: 1;
  pointer-events: auto;
}

.back-to-top:hover {
  background: var(--color-primary-hover);
  transform: translateY(-2px);
}

/* ========================================
   COMMENTS
   ======================================== */
.comments-section {
  margin-top: var(--space-12);
  padding-top: var(--space-8);
  border-top: 2px solid var(--color-border);
}

.comment-list {
  margin-bottom: var(--space-8);
}

.comment {
  padding: var(--space-5);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  margin-bottom: var(--space-4);
}

.comment .children {
  margin-top: var(--space-4);
  margin-left: var(--space-8);
}

.comment-meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
}

.comment-author-name {
  font-weight: 700;
  color: var(--color-text);
  font-size: var(--font-size-sm);
}

.comment-date {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

.comment-content p {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2);
}

/* Comment form */
.comment-form input,
.comment-form textarea {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: var(--font-size-sm);
  color: var(--color-text);
  background: var(--color-surface);
  transition: border-color var(--transition-fast);
  margin-bottom: var(--space-4);
}

.comment-form input:focus,
.comment-form textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(26, 86, 219, 0.1);
}

.comment-form textarea {
  min-height: 120px;
  resize: vertical;
}

/* ========================================
   404 PAGE
   ======================================== */
.error-404 {
  text-align: center;
  padding: var(--space-16) var(--space-4);
}

.error-404-code {
  font-size: 6rem;
  font-weight: 900;
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: var(--space-4);
}

/* ========================================
   SEARCH FORM
   ======================================== */
.search-form {
  display: flex;
  gap: var(--space-2);
}

.search-field {
  flex: 1;
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: var(--font-size-base);
  color: var(--color-text);
  background: var(--color-surface);
  transition: border-color var(--transition-fast);
}

.search-field:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(26, 86, 219, 0.1);
}

.search-submit {
  padding: var(--space-3) var(--space-5);
  background: var(--color-primary);
  color: #fff;
  border: none;
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: var(--font-size-base);
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition-fast);
  white-space: nowrap;
}

.search-submit:hover {
  background: var(--color-primary-hover);
}

/* ========================================
   UTILITIES
   ======================================== */
.text-center { text-align: center; }
.text-right { text-align: right; }
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

.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); }

/* Print styles */
@media print {
  .site-header, .sidebar, .site-footer, .back-to-top { display: none; }
  .content-area { grid-template-columns: 1fr; }
}