/**
 * ============================================================================
 * S-APP CORE COMPONENT & UTILITY CSS (APP-THEME.CSS)
 * ============================================================================
 * Phiên bản: v6.0.3
 * Mục đích: Chuẩn hóa toàn bộ Button, Card, Table, Form, Badge, Tabs
 *           dựa trên biến CSS Master (theme-variables.css).
 * ============================================================================
 */

/* ========================================================================
 * 1. BRAND IDENTITY COMPONENTS (HEADER, LOGO & TITLES)
 * ======================================================================== */
.brand-title-orange {
  color: var(--brand-primary);
  font-weight: 800;
  letter-spacing: 0.5px;
}
.brand-domain-green {
  color: var(--brand-secondary);
  font-weight: 700;
}
.brand-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: var(--brand-primary-light);
  color: var(--brand-primary);
  border: 1px solid var(--brand-primary-border);
  padding: 3px 10px;
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: 700;
}

/* ========================================================================
 * 2. BUTTONS (CHUẨN HÓA NÚT BẤM)
 * ======================================================================== */
.btn-brand-primary {
  background: var(--brand-primary);
  color: #ffffff !important;
  border: none;
  font-weight: 600;
  border-radius: var(--radius-sm);
  padding: 8px 16px;
  transition: all var(--transition-fast);
  box-shadow: var(--shadow-xs);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  text-decoration: none !important;
  cursor: pointer;
}
.btn-brand-primary:hover {
  background: var(--brand-primary-hover);
  color: #ffffff !important;
  box-shadow: var(--shadow-sunshine);
  transform: translateY(-1px);
}
.btn-brand-primary:active {
  transform: translateY(0);
}

.btn-brand-secondary {
  background: var(--brand-secondary);
  color: #ffffff !important;
  border: none;
  font-weight: 600;
  border-radius: var(--radius-sm);
  padding: 8px 16px;
  transition: all var(--transition-fast);
  box-shadow: var(--shadow-xs);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  text-decoration: none !important;
  cursor: pointer;
}
.btn-brand-secondary:hover {
  background: var(--brand-secondary-hover);
  color: #ffffff !important;
  transform: translateY(-1px);
}

.btn-brand-outline {
  background: transparent;
  color: var(--brand-primary) !important;
  border: 1px solid var(--brand-primary);
  font-weight: 600;
  border-radius: var(--radius-sm);
  padding: 7px 15px;
  transition: all var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  text-decoration: none !important;
  cursor: pointer;
}
.btn-brand-outline:hover {
  background: var(--brand-primary-light);
  color: var(--brand-primary-hover) !important;
}

.btn-brand-soft {
  background: var(--brand-primary-light);
  color: var(--brand-primary-hover) !important;
  border: 1px solid var(--brand-primary-border);
  font-weight: 600;
  border-radius: var(--radius-sm);
  padding: 6px 12px;
  font-size: 13px;
  transition: all var(--transition-fast);
  cursor: pointer;
}
.btn-brand-soft:hover {
  background: var(--brand-primary-100);
}

/* ========================================================================
 * 3. CARDS & WIDGET CONTAINERS
 * ======================================================================== */
.theme-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  padding: 18px 20px;
  margin-bottom: 18px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-fast);
}
.theme-card-hover:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--card-border-hover);
}
.theme-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 12px;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--card-border);
}
.theme-card-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-main);
  margin: 0;
  display: flex;
  align-items: center;
  gap: 8px;
}

.theme-stat-card {
  background: #ffffff;
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  padding: 16px;
  display: flex;
  align-items: center;
  gap: 14px;
  box-shadow: var(--shadow-xs);
  transition: transform var(--transition-fast);
}
.theme-stat-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}
.stat-icon-wrap {
  width: 46px;
  height: 46px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  flex-shrink: 0;
}
.stat-icon-orange {
  background: var(--brand-primary-light);
  color: var(--brand-primary);
  border: 1px solid var(--brand-primary-border);
}
.stat-icon-green {
  background: var(--brand-secondary-light);
  color: var(--brand-secondary);
  border: 1px solid var(--brand-secondary-border);
}

/* ========================================================================
 * 4. DATA TABLES (BẢNG HIỂN THỊ DỮ LIỆU HIỆN ĐẠI)
 * ======================================================================== */
.theme-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13.5px;
  background: #ffffff;
  border-radius: var(--radius-md);
  overflow: hidden;
}
.theme-table th {
  background: var(--table-header-bg);
  color: var(--table-header-text);
  font-weight: 700;
  padding: 12px 14px;
  border-bottom: 2px solid var(--table-border);
  text-align: left;
  white-space: nowrap;
}
.theme-table td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--table-border);
  color: var(--text-main);
  vertical-align: middle;
}
.theme-table tr:hover td {
  background: var(--table-row-hover);
}

/* ========================================================================
 * 5. FORMS & INPUTS (Ô NHẬP LIỆU)
 * ======================================================================== */
.theme-input, .theme-select {
  width: 100%;
  padding: 8px 12px;
  border: 1px solid var(--input-border);
  border-radius: var(--radius-sm);
  background: var(--input-bg);
  color: var(--input-text);
  font-size: 13.5px;
  outline: none;
  transition: all var(--transition-fast);
}
.theme-input:focus, .theme-select:focus {
  border-color: var(--input-border-focus);
  box-shadow: var(--input-shadow-focus);
}
.theme-label {
  font-size: 12.5px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 4px;
  display: block;
}

/* ========================================================================
 * 6. BADGES & STATUS PILLS
 * ======================================================================== */
.badge-soft-success {
  background: var(--color-success-bg);
  color: var(--color-success-text);
  border: 1px solid var(--color-success-border);
  padding: 2px 8px;
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: 600;
}
.badge-soft-warning {
  background: var(--color-warning-bg);
  color: var(--color-warning-text);
  border: 1px solid var(--color-warning-border);
  padding: 2px 8px;
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: 600;
}
.badge-soft-danger {
  background: var(--color-danger-bg);
  color: var(--color-danger-text);
  border: 1px solid var(--color-danger-border);
  padding: 2px 8px;
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: 600;
}
.badge-soft-info {
  background: var(--color-info-bg);
  color: var(--color-info-text);
  border: 1px solid var(--color-info-border);
  padding: 2px 8px;
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: 600;
}

/* ========================================================================
 * 7. TABS NAVIGATION
 * ======================================================================== */
.theme-tabs {
  display: flex;
  gap: 6px;
  border-bottom: 2px solid var(--card-border);
  margin-bottom: 18px;
  overflow-x: auto;
}
.theme-tab-item {
  padding: 10px 18px;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--text-muted);
  text-decoration: none !important;
  border-bottom: 3px solid transparent;
  margin-bottom: -2px;
  transition: all var(--transition-fast);
  white-space: nowrap;
  cursor: pointer;
}
.theme-tab-item:hover {
  color: var(--brand-primary);
}
.theme-tab-item.active {
  color: var(--brand-primary);
  border-bottom-color: var(--brand-primary);
}

/* ========================================================================
 * 8. AVATAR & THẺ HỌC VIÊN
 * ======================================================================== */
.student-avatar {
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--brand-primary-border);
}
.student-avatar-lg { width: 80px; height: 80px; }
.student-avatar-md { width: 44px; height: 44px; }
.student-avatar-sm { width: 32px; height: 32px; }

/* ========================================================================
 * 9. MASTER LAYOUT: TOPBAR & SIDEBAR STYLES
 * ======================================================================== */
/* Ensure style tags are never visible */
style, #page-nav style, #page-sidebar style {
  display: none !important;
}

/* [TOPBAR NAVIGATION: #page-nav] */
#page-nav {
  display: flex !important;
  align-items: center;
  background: var(--brand-gradient-sun) !important;
  color: #ffffff !important;
  min-height: 52px;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-sm);
  padding: 0 8px;
}

#page-nav > a,
#page-nav > #page-button-side-new,
#page-nav > #page-button-side2-new,
#page-nav > #page-button-tasks,
#page-nav > #page-button-tasks-noti,
#page-nav > .nav-item {
  flex: 1;
  text-align: center;
  color: #ffffff !important;
  padding: 6px 4px;
  cursor: pointer;
  text-decoration: none !important;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

#page-nav > a:hover,
#page-nav > #page-button-side-new:hover,
#page-nav > #page-button-side2-new:hover,
#page-nav > #page-button-tasks:hover,
#page-nav > #page-button-tasks-noti:hover,
#page-nav > .nav-item:hover {
  background: rgba(255, 255, 255, 0.18) !important;
  transform: translateY(-1px);
}

#page-nav i {
  font-size: 18px;
  margin-bottom: 2px;
}

.nav_text {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.2px;
}

#page-button-side-new {
  display: none !important;
}

/* Mobile Sidebar Header & Close Button */
.sidebar-mobile-header {
  display: none;
  align-items: center;
  justify-content: space-between;
  padding: 4px 6px 10px;
  margin-bottom: 10px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.sidebar-close-btn {
  background: rgba(239, 68, 68, 0.15) !important;
  color: #fca5a5 !important;
  border: 1px solid rgba(239, 68, 68, 0.35) !important;
  border-radius: var(--radius-sm) !important;
  padding: 4px 10px !important;
  font-size: 11px !important;
  font-weight: 600 !important;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: all var(--transition-fast);
  outline: none;
}

.sidebar-close-btn:hover {
  background: rgba(239, 68, 68, 0.3) !important;
  color: #ffffff !important;
  border-color: #ef4444 !important;
}

/* Mobile Dark Overlay */
.bg_hide {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(15, 23, 42, 0.65);
  backdrop-filter: blur(2px);
  -webkit-backdrop-filter: blur(2px);
  z-index: 999;
  cursor: pointer;
}

@media (max-width: 1024px) {
  #page-button-side-new {
    display: inline-flex !important;
  }
  #searchhs {
    display: none !important;
  }
  .sidebar-mobile-header {
    display: flex !important;
  }
  #page-sidebar {
    position: fixed !important;
    top: 0 !important;
    left: -260px !important;
    z-index: 1000 !important;
    transition: left 0.3s ease-in-out !important;
    box-shadow: 4px 0 20px rgba(0, 0, 0, 0.3) !important;
  }
  #page-sidebar.active {
    left: 0 !important;
  }
}

@media (max-width: 768px) {
  .nav_text {
    font-size: 9px;
  }
  #page-nav {
    line-height: 1 !important;
  }
}

/* Search Box in Topbar */
#searchhs {
  flex: 2 !important;
  max-width: 300px;
}

#searchhs input {
  width: 90% !important;
  margin: 0 auto !important;
  display: block;
  padding: 6px 14px !important;
  background: rgba(255, 255, 255, 0.95) !important;
  color: var(--text-main) !important;
  border: 1px solid rgba(255, 255, 255, 0.4) !important;
  border-radius: var(--radius-full) !important;
  font-size: 12.5px !important;
  outline: none;
  transition: all var(--transition-fast);
  box-shadow: inset 0 1px 2px rgba(0,0,0,0.1);
}

#searchhs input:focus {
  background: #ffffff !important;
  box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.35) !important;
}

#searchhs input::placeholder {
  color: #94a3b8 !important;
  font-size: 12px;
}

/* [SIDEBAR NAVIGATION: #page-sidebar] */
#page-sidebar {
  width: 220px !important;
  min-width: 220px !important;
  background: var(--sidebar-bg) !important;
  color: var(--sidebar-text) !important;
  height: 100vh;
  overflow-y: auto;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  padding: 12px 10px;
  box-shadow: 2px 0 8px rgba(0,0,0,0.12);
  z-index: 101;
}

#page-sidebar::-webkit-scrollbar {
  width: 5px;
}
#page-sidebar::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.15);
  border-radius: 4px;
}
#page-sidebar::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.3);
}

/* Sidebar User Header Card */
.sidebar-user-card {
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  padding: 10px 12px;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.sidebar-user-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 2px solid var(--brand-primary);
  object-fit: cover;
  background: white;
}

.sidebar-user-info {
  flex: 1;
  overflow: hidden;
}

.sidebar-user-name {
  font-size: 13px;
  font-weight: 700;
  color: #ffffff;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sidebar-user-role {
  font-size: 11px;
  color: var(--brand-primary-300);
}

.sidebar-exit-btn {
  color: #fca5a5;
  font-size: 13px;
  cursor: pointer;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  border: 1px solid rgba(252, 165, 165, 0.3);
  background: rgba(239, 68, 68, 0.12);
  transition: all var(--transition-fast);
  text-decoration: none !important;
  flex-shrink: 0;
  margin-left: 6px;
}
.sidebar-exit-btn:hover {
  background: rgba(239, 68, 68, 0.35);
  color: #ffffff;
  border-color: #ef4444;
  transform: scale(1.06);
}

/* Group Accordion in Sidebar */
.group-container {
  background: rgba(255, 255, 255, 0.04) !important;
  border: 1px solid rgba(255, 255, 255, 0.08) !important;
  border-radius: var(--radius-sm) !important;
  margin-bottom: 6px !important;
  padding: 4px 6px !important;
  transition: background var(--transition-fast);
}
.group-container:hover {
  background: rgba(255, 255, 255, 0.07) !important;
}

.group-header {
  font-size: 12px !important;
  font-weight: 700 !important;
  color: #cbd5e1 !important;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 6px 4px !important;
  user-select: none;
}
.group-header:hover {
  color: #ffffff !important;
}
.group-header .arrow {
  font-size: 11px;
  transition: transform var(--transition-fast);
}

.group-content {
  overflow: hidden;
  max-height: 0;
  opacity: 0;
  transition: all 0.25s ease-in-out;
}
.group-content.open {
  max-height: 1200px;
  opacity: 1;
  padding-top: 4px;
}

.group-content a {
  display: flex !important;
  align-items: center;
  gap: 8px;
  padding: 6px 8px !important;
  color: #94a3b8 !important;
  text-decoration: none !important;
  border-radius: var(--radius-xs);
  font-size: 12px;
  font-weight: 500;
  transition: all var(--transition-fast);
  margin-bottom: 2px;
}

.group-content a:hover {
  background: rgba(255, 255, 255, 0.1) !important;
  color: #ffffff !important;
  transform: translateX(3px);
}

.group-content a.active-module {
  background: var(--brand-primary) !important;
  color: #ffffff !important;
  font-weight: 700;
  box-shadow: 0 2px 6px rgba(245, 130, 32, 0.4);
}

/* [MAIN PAGE CONTAINER: #page-main & #page-contents] */
#page-main {
  flex: 1;
  height: 100vh;
  overflow-y: auto;
  background: var(--app-bg);
  display: flex;
  flex-direction: column;
}

#page-contents {
  padding: 20px 24px;
  flex: 1;
}

@media (max-width: 768px) {
  #page-contents {
    padding: 10px 10px 16px 10px !important;
  }
  .nav-custom,
  .nav-pills {
    margin-top: 8px !important;
  }
}

/* ========================================================================
 * 12. MODULE NAVIGATION TABS (.nav-custom & .nav-pills ĐỒNG BỘ NHỎ GỌN)
 * ======================================================================== */
.nav-custom,
.nav-pills {
  display: flex !important;
  align-items: center !important;
  gap: 6px !important;
  margin-bottom: 12px !important;
  flex-wrap: wrap !important;
  border-bottom: 1px solid var(--border-color, #E2E8F0) !important;
  padding-bottom: 8px !important;
}

.nav-custom .tab-link,
.nav-pills .nav-link,
.nav-custom .nav-link,
.nav-pills .tab-link {
  text-decoration: none !important;
  padding: 4px 10px !important;
  border-radius: 6px !important;
  font-weight: 600 !important;
  font-size: 11.5px !important;
  letter-spacing: 0.2px !important;
  color: var(--text-muted, #64748B) !important;
  background: #ffffff !important;
  border: 1px solid var(--border-color, #CBD5E1) !important;
  transition: all 0.15s ease !important;
  box-shadow: 0 1px 2px rgba(0,0,0,0.03) !important;
  display: inline-flex !important;
  align-items: center !important;
  gap: 5px !important;
  line-height: 1.4 !important;
  white-space: nowrap !important;
}

.nav-custom .tab-link i,
.nav-pills .nav-link i {
  font-size: 11px !important;
}

.nav-custom .tab-link:hover:not(.active),
.nav-pills .nav-link:hover:not(.active):not(.active-danger) {
  background: #f8fafc !important;
  color: var(--brand-primary, #f58220) !important;
  border-color: var(--brand-primary, #f58220) !important;
  transform: translateY(-1px) !important;
}

.nav-custom .tab-link.active,
.nav-pills .nav-link.active {
  background: linear-gradient(135deg, #f58220 0%, #ff9f43 100%) !important;
  color: #ffffff !important;
  border-color: transparent !important;
  box-shadow: 0 2px 6px rgba(245, 130, 32, 0.25) !important;
}

.nav-pills .nav-link.active-danger {
  background: linear-gradient(135deg, #ef4444 0%, #f87171 100%) !important;
  color: #ffffff !important;
  border-color: transparent !important;
  box-shadow: 0 2px 6px rgba(239, 68, 68, 0.25) !important;
}

/* Nút Read me khi nằm trong thanh .nav-custom hoặc .nav-pills */
.nav-custom .readme-toggle-btn,
.nav-pills .readme-toggle-btn {
  margin-left: auto !important;
  margin-top: 0 !important;
  margin-bottom: 0 !important;
  flex-shrink: 0 !important;
}