/* ========================================================
   HỆ THỐNG ĐIỂM DANH & ĐÁNH GIÁ HỌC TẬP NGHỊ QUYẾT TRỰC TUYẾN
   TỐI ƯU HÓA TRẢI NGHIỆM NGƯỜI THI THEO TRIẾT LÝ THIẾT KẾ APPLE
   (Simplicity • Focus • Clarity • Smooth Interactions)
   ======================================================== */

:root {
  /* Apple Color System & Brand Accents */
  --apple-bg: #f5f5f7;
  --apple-card: #ffffff;
  --apple-border: rgba(0, 0, 0, 0.07);
  --apple-border-hover: rgba(0, 0, 0, 0.18);
  
  --primary-red: #9f1239; /* Crimson Red thanh lịch kiểu Apple Product RED */
  --primary-red-hover: #881337;
  --primary-red-light: #fff1f2;
  
  --accent-gold: #f59e0b;
  --accent-gold-hover: #d97706;

  --apple-text: #1d1d1f;
  --apple-text-secondary: #6e6e73;
  --apple-text-tertiary: #86868b;
  
  --success-green: #10b981;
  --success-bg: #ecfdf5;
  --success-border: #a7f3d0;

  --danger-red: #ef4444;
  --danger-bg: #fef2f2;
  --danger-border: #fecaca;

  --info-blue: #0284c7;
  --info-bg: #f0f9ff;

  --radius-xs: 8px;
  --radius-sm: 12px;
  --radius-md: 18px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --radius-full: 9999px;

  --shadow-subtle: 0 2px 8px rgba(0, 0, 0, 0.04);
  --shadow-apple: 0 8px 30px rgba(0, 0, 0, 0.05);
  --shadow-floating: 0 16px 40px rgba(0, 0, 0, 0.08);
  --shadow-modal: 0 24px 60px rgba(0, 0, 0, 0.16);

  --font-stack: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Segoe UI", Roboto, sans-serif;
  --ease-apple: cubic-bezier(0.16, 1, 0.3, 1);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-stack);
  background-color: var(--apple-bg);
  color: var(--apple-text);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ========================================================
   HEADER CHÍNH: TỐI GIẢN, TRANG NHÃ THEO CHUẨN APPLE
   ======================================================== */
.main-header {
  background: rgba(159, 18, 57, 0.94);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  color: #ffffff;
  padding: 0.75rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.1);
  position: sticky;
  top: 0;
  z-index: 100;
  transition: all 0.3s var(--ease-apple);
}

.header-brand {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  text-decoration: none;
  color: #ffffff;
  cursor: pointer;
}

.brand-icon-box {
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.25);
  color: #ffffff;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  transition: transform 0.2s;
}

.brand-icon-box:hover {
  transform: scale(1.05);
}

.brand-text-box h1 {
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: -0.2px;
  line-height: 1.2;
}

.brand-text-box p {
  font-size: 0.76rem;
  opacity: 0.85;
  font-weight: 400;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.user-info-pill {
  background-color: rgba(0, 0, 0, 0.25);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-full);
  padding: 0.35rem 0.95rem;
  display: flex;
  align-items: center;
  gap: 0.55rem;
  font-size: 0.82rem;
  color: #ffffff;
}

.online-dot {
  width: 7px;
  height: 7px;
  background-color: #34d399;
  border-radius: 50%;
  box-shadow: 0 0 8px #34d399;
  display: inline-block;
}

.btn-logout {
  background: transparent;
  border: none;
  color: rgba(255, 255, 255, 0.75);
  cursor: pointer;
  padding: 2px 4px;
  display: inline-flex;
  align-items: center;
  transition: color 0.2s;
  font-size: 0.9rem;
}

.btn-logout:hover {
  color: #ffffff;
}

/* Nút chuyển đổi vai trò (Apple Segmented Style) */
.role-switch-group {
  display: flex;
  align-items: center;
  background-color: rgba(0, 0, 0, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.15);
  padding: 3px;
  border-radius: var(--radius-full);
  gap: 3px;
}

.role-btn {
  padding: 0.38rem 0.95rem;
  border: none;
  border-radius: var(--radius-full);
  background: transparent;
  color: rgba(255, 255, 255, 0.85);
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  transition: all 0.25s var(--ease-apple);
}

.role-btn:hover {
  color: #ffffff;
}

.role-btn.active {
  background-color: #ffffff;
  color: var(--primary-red);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

/* ========================================================
   SUB-NAVBAR CHO QUẢN TRỊ
   ======================================================== */
.admin-navbar-wrap {
  background-color: #ffffff;
  border-bottom: 1px solid var(--apple-border);
  box-shadow: var(--shadow-subtle);
  padding: 0.4rem 2rem;
}

.admin-nav-tabs {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  overflow-x: auto;
  white-space: nowrap;
}

.admin-nav-item {
  padding: 0.55rem 0.95rem;
  border-radius: var(--radius-sm);
  border: none;
  background: transparent;
  color: var(--apple-text-secondary);
  font-size: 0.83rem;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  transition: all 0.2s;
  text-decoration: none;
}

.admin-nav-item:hover {
  background-color: var(--apple-bg);
  color: var(--primary-red);
}

.admin-nav-item.active {
  background-color: var(--primary-red);
  color: #ffffff;
}

/* ========================================================
   CONTAINER & LAYOUT
   ======================================================== */
.content-wrapper {
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
  padding: 2rem 1.5rem;
  flex: 1;
}

/* ========================================================
   APPLE-STYLE UI CARDS & FORMS (GIAO DIỆN NGƯỜI THI MỚI)
   ======================================================== */
.apple-card {
  background-color: var(--apple-card);
  border: 1px solid var(--apple-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-apple);
  overflow: hidden;
  transition: all 0.3s var(--ease-apple);
}

.apple-card-hover:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-floating);
  border-color: var(--apple-border-hover);
}

/* Form input Apple */
.apple-input-box {
  position: relative;
  width: 100%;
}

.apple-input {
  width: 100%;
  padding: 0.85rem 1.15rem;
  font-size: 0.95rem;
  border: 1px solid var(--apple-border);
  border-radius: var(--radius-md);
  background-color: #fafafc;
  color: var(--apple-text);
  outline: none;
  font-family: var(--font-stack);
  transition: all 0.2s var(--ease-apple);
}

.apple-input:focus {
  background-color: #ffffff;
  border-color: var(--primary-red);
  box-shadow: 0 0 0 3px rgba(159, 18, 57, 0.12);
}

/* Nút bấm Apple Pill Style */
.btn-apple {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  padding: 0.75rem 1.6rem;
  font-size: 0.92rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.25s var(--ease-apple);
  text-decoration: none;
  font-family: var(--font-stack);
}

.btn-apple:hover {
  transform: scale(1.02);
}

.btn-apple:active {
  transform: scale(0.98);
}

.btn-apple-primary {
  background-color: var(--primary-red);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(159, 18, 57, 0.25);
}

.btn-apple-primary:hover {
  background-color: var(--primary-red-hover);
  box-shadow: 0 6px 18px rgba(159, 18, 57, 0.35);
}

.btn-apple-secondary {
  background-color: #f1f1f4;
  color: var(--apple-text);
  border-color: rgba(0, 0, 0, 0.04);
}

.btn-apple-secondary:hover {
  background-color: #e5e5ea;
}

.btn-apple-gold {
  background-color: var(--accent-gold);
  color: #1e1e1e;
  box-shadow: 0 4px 14px rgba(245, 158, 11, 0.25);
}

.btn-apple-gold:hover {
  background-color: var(--accent-gold-hover);
}

/* Chips / Segmented buttons */
.apple-chips-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.apple-chip {
  padding: 0.45rem 1rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--apple-border);
  background-color: #f5f5f7;
  color: var(--apple-text-secondary);
  font-size: 0.82rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
}

.apple-chip:hover {
  background-color: #e5e5ea;
  color: var(--apple-text);
}

.apple-chip.active {
  background-color: var(--primary-red);
  border-color: var(--primary-red);
  color: #ffffff;
  box-shadow: 0 2px 8px rgba(159, 18, 57, 0.2);
}

/* ========================================================
   FOCUS EXAM MODE (GIAO DIỆN LÀM BÀI THI TẬP TRUNG APPLE)
   ======================================================== */
.exam-focus-container {
  max-width: 820px;
  margin: 0 auto;
}

/* Header thi dạng Capsule nổi */
.exam-floating-header {
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--apple-border);
  border-radius: var(--radius-full);
  padding: 0.65rem 1.4rem;
  margin-bottom: 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: var(--shadow-subtle);
  position: sticky;
  top: 75px;
  z-index: 90;
}

.exam-progress-bar-wrap {
  flex: 1;
  max-width: 320px;
  margin: 0 1.25rem;
}

.apple-progress-track {
  height: 6px;
  background-color: #e5e5ea;
  border-radius: var(--radius-full);
  overflow: hidden;
  position: relative;
}

.apple-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, #be123c, #9f1239);
  border-radius: var(--radius-full);
  transition: width 0.35s var(--ease-apple);
}

.exam-timer-capsule {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.95rem;
  font-weight: 700;
  font-family: monospace;
  background-color: #f1f1f4;
  color: var(--apple-text);
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-full);
}

.exam-timer-capsule.warning {
  background-color: #fee2e2;
  color: #dc2626;
  animation: pulse 1.5s infinite;
}

/* Thẻ câu hỏi Focus (Hero Question Card) */
.exam-hero-card {
  background-color: var(--apple-card);
  border: 1px solid var(--apple-border);
  border-radius: var(--radius-xl);
  padding: 2.5rem;
  box-shadow: var(--shadow-apple);
  margin-bottom: 1.75rem;
  position: relative;
  transition: all 0.3s var(--ease-apple);
}

.exam-question-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.25rem;
}

.exam-question-badge {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--primary-red);
  background-color: var(--primary-red-light);
  padding: 0.3rem 0.85rem;
  border-radius: var(--radius-full);
}

.btn-apple-flag {
  border: none;
  background: transparent;
  color: var(--apple-text-tertiary);
  font-size: 0.85rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-full);
  transition: all 0.2s;
}

.btn-apple-flag:hover {
  background-color: #f1f1f4;
  color: var(--apple-text);
}

.btn-apple-flag.active {
  background-color: #fef3c7;
  color: #d97706;
}

.exam-hero-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--apple-text);
  line-height: 1.55;
  margin-bottom: 2rem;
  letter-spacing: -0.2px;
}

/* Danh sách các Option Cell chuẩn iOS */
.apple-options-group {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.apple-option-cell {
  background-color: #ffffff;
  border: 1.5px solid var(--apple-border);
  border-radius: var(--radius-md);
  padding: 1.1rem 1.4rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 1rem;
  transition: all 0.2s var(--ease-apple);
  position: relative;
}

.apple-option-cell:hover {
  background-color: #fafafc;
  border-color: var(--apple-border-hover);
  transform: translateY(-1px);
}

.apple-option-cell.selected {
  background-color: #fffafb;
  border-color: var(--primary-red);
  box-shadow: 0 0 0 1px var(--primary-red), 0 4px 12px rgba(159, 18, 57, 0.08);
}

.apple-option-letter {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  border: 1.5px solid #d1d5db;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.88rem;
  color: var(--apple-text-secondary);
  flex-shrink: 0;
  transition: all 0.2s var(--ease-apple);
}

.apple-option-cell.selected .apple-option-letter {
  background-color: var(--primary-red);
  border-color: var(--primary-red);
  color: #ffffff;
}

.apple-option-text {
  font-size: 0.95rem;
  color: var(--apple-text);
  line-height: 1.5;
  flex: 1;
}

/* Thanh điều khiển câu hỏi Next / Prev & Grid số câu */
.exam-navigation-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 1.5rem;
  gap: 1rem;
}

/* Hàng nút tròn số câu hỏi kiểu iOS Pagination */
.apple-question-dots {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-top: 2rem;
  padding: 1rem;
  background: var(--apple-card);
  border: 1px solid var(--apple-border);
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-subtle);
}

.apple-dot-btn {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid transparent;
  background-color: #f1f1f4;
  color: var(--apple-text-secondary);
  font-size: 0.82rem;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
}

.apple-dot-btn:hover {
  background-color: #e5e5ea;
  color: var(--apple-text);
}

.apple-dot-btn.current {
  background-color: var(--apple-text);
  color: #ffffff;
}

.apple-dot-btn.answered {
  background-color: var(--primary-red-light);
  color: var(--primary-red);
}

.apple-dot-btn.flagged {
  border-color: var(--accent-gold);
  background-color: #fef3c7;
  color: #b45309;
}

/* ========================================================
   APPLE SUMMARY RESULT (KẾT QUẢ THI TỐI GIẢN CAO CẤP)
   ======================================================== */
.apple-summary-card {
  background: var(--apple-card);
  border: 1px solid var(--apple-border);
  border-radius: var(--radius-xl);
  padding: 3rem 2rem;
  text-align: center;
  box-shadow: var(--shadow-apple);
  margin-bottom: 2rem;
}

.apple-score-ring {
  width: 130px;
  height: 130px;
  border-radius: 50%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.5rem auto;
  position: relative;
}

.apple-score-ring.passed {
  background: linear-gradient(135deg, #ecfdf5 0%, #d1fae5 100%);
  border: 4px solid #10b981;
  color: #065f46;
}

.apple-score-ring.failed {
  background: linear-gradient(135deg, #fef2f2 0%, #fee2e2 100%);
  border: 4px solid #ef4444;
  color: #991b1b;
}

.apple-score-number {
  font-size: 3rem;
  font-weight: 800;
  line-height: 1;
  letter-spacing: -1px;
}

.apple-score-total {
  font-size: 0.85rem;
  font-weight: 600;
  opacity: 0.8;
}

/* ========================================================
   CÁC THÀNH PHẦN QUẢN TRỊ (GIỮ NGUYÊN CHUẨN ĐỒ HỌA TRƯỚC ĐÓ)
   ======================================================== */
.page-head-card {
  background-color: #ffffff;
  border: 1px solid var(--apple-border);
  border-radius: var(--radius-md);
  padding: 1.1rem 1.4rem;
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  box-shadow: var(--shadow-subtle);
}

.page-head-left h2 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--apple-text);
  display: flex;
  align-items: center;
  gap: 0.55rem;
}

.page-head-left p {
  font-size: 0.82rem;
  color: var(--apple-text-secondary);
  margin-top: 0.2rem;
}

.page-head-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  padding: 0.5rem 1.05rem;
  font-size: 0.85rem;
  font-weight: 600;
  border-radius: var(--radius-xs);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.2s;
  text-decoration: none;
}

.btn-primary {
  background-color: var(--primary-red);
  color: #ffffff;
}

.btn-primary:hover {
  background-color: var(--primary-red-hover);
}

.btn-gold {
  background-color: var(--accent-gold);
  color: #1e1e1e;
}

.btn-gold:hover {
  background-color: var(--accent-gold-hover);
}

.btn-secondary {
  background-color: #ffffff;
  color: var(--apple-text);
  border-color: var(--apple-border);
}

.btn-secondary:hover {
  background-color: #f8fafc;
}

.btn-danger {
  background-color: var(--danger-red);
  color: #ffffff;
}

.btn-sm {
  padding: 0.32rem 0.65rem;
  font-size: 0.78rem;
}

.btn-lg {
  padding: 0.75rem 1.6rem;
  font-size: 0.95rem;
}

.btn-block {
  width: 100%;
}

.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.kpi-card {
  background-color: #ffffff;
  border: 1px solid var(--apple-border);
  border-radius: var(--radius-md);
  padding: 1.1rem 1.25rem;
  box-shadow: var(--shadow-subtle);
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
}

.kpi-label {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--apple-text-tertiary);
  letter-spacing: 0.4px;
}

.kpi-value {
  font-size: 1.85rem;
  font-weight: 800;
  color: var(--apple-text);
  line-height: 1.2;
  margin: 0.35rem 0 0.2rem 0;
}

.kpi-desc {
  font-size: 0.76rem;
  color: var(--apple-text-secondary);
}

.kpi-icon-box {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.15rem;
}

.kpi-icon-cyan { background-color: #e0f2fe; color: #0284c7; }
.kpi-icon-red { background-color: #fee2e2; color: #dc2626; }
.kpi-icon-green { background-color: #dcfce7; color: #16a34a; }
.kpi-icon-gold { background-color: #fef3c7; color: #d97706; }
.kpi-icon-rose { background-color: #ffe4e6; color: #e11d48; }
.kpi-icon-purple { background-color: #ede9fe; color: #7c3aed; }

.custom-table-card {
  background-color: #ffffff;
  border: 1px solid var(--apple-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-subtle);
  overflow: hidden;
  margin-bottom: 1.25rem;
}

.table-responsive {
  overflow-x: auto;
}

.custom-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
  text-align: left;
}

.custom-table th {
  background-color: #f8fafc;
  color: var(--apple-text-tertiary);
  font-weight: 700;
  font-size: 0.75rem;
  text-transform: uppercase;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--apple-border);
}

.custom-table td {
  padding: 0.8rem 1rem;
  border-bottom: 1px solid #f1f5f9;
  vertical-align: middle;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.2rem 0.55rem;
  border-radius: var(--radius-xs);
  font-size: 0.74rem;
  font-weight: 600;
}

.badge-parent { background-color: #ede9fe; color: #6d28d9; }
.badge-base { background-color: #e0f2fe; color: #0369a1; }
.badge-direct { background-color: #ccfbf1; color: #0f766e; }
.badge-success { background-color: #dcfce7; color: #15803d; }
.badge-danger { background-color: #fee2e2; color: #b91c1c; }
.badge-warning { background-color: #fef3c7; color: #b45309; }
.badge-gray { background-color: #f1f5f9; color: #475569; }

.avatar-circle {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background-color: #fee2e2;
  color: #dc2626;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.85rem;
}

/* Modals */
.modal-overlay {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.45);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 1.5rem;
  opacity: 0;
  visibility: hidden;
  transition: all 0.25s var(--ease-apple);
}

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

.modal-container {
  background-color: #ffffff;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-modal);
  width: 100%;
  max-width: 580px;
  max-height: 90vh;
  overflow-y: auto;
  transform: scale(0.95);
  transition: transform 0.25s var(--ease-apple);
}

.modal-overlay.active .modal-container {
  transform: scale(1);
}

.modal-container.modal-lg { max-width: 860px; }
.modal-container.modal-xl { max-width: 1050px; }

.modal-header-red {
  background: linear-gradient(135deg, #9f1239 0%, #881337 100%);
  color: #ffffff;
  padding: 1.25rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-header-red h3 {
  font-size: 1.1rem;
  font-weight: 700;
}

.btn-close-modal {
  background: transparent;
  border: none;
  color: #ffffff;
  font-size: 1.25rem;
  cursor: pointer;
  opacity: 0.8;
}

.btn-close-modal:hover { opacity: 1; }

.modal-body { padding: 1.5rem; }
.modal-footer {
  padding: 1rem 1.5rem;
  background-color: #f8fafc;
  border-top: 1px solid var(--apple-border);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.65rem;
}

.form-group { margin-bottom: 1.1rem; }
.form-label {
  display: block;
  font-size: 0.83rem;
  font-weight: 700;
  margin-bottom: 0.4rem;
  color: var(--apple-text);
}

.form-control {
  width: 100%;
  padding: 0.65rem 0.9rem;
  font-size: 0.88rem;
  border: 1px solid var(--apple-border);
  border-radius: var(--radius-xs);
  background-color: #ffffff;
  color: var(--apple-text);
  outline: none;
}

.form-control:focus {
  border-color: var(--primary-red);
  box-shadow: 0 0 0 3px rgba(159, 18, 57, 0.12);
}

.main-footer {
  background-color: #111827;
  color: #9ca3af;
  padding: 1.25rem 1.5rem;
  text-align: center;
  font-size: 0.78rem;
  margin-top: auto;
}

.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  pointer-events: none;
}

.toast-msg {
  pointer-events: auto;
  background-color: rgba(29, 29, 31, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  color: #ffffff;
  padding: 0.85rem 1.25rem;
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-floating);
  font-size: 0.85rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 0.65rem;
  border-left: 4px solid var(--primary-red);
}

.toast-msg.success { border-left-color: var(--success-green); }
.toast-msg.warning { border-left-color: var(--accent-gold); }
.toast-msg.danger { border-left-color: var(--danger-red); }

/* ==============================================================
   PHÂN HỆ QUẢN TRỊ NÂNG CAO (ENTERPRISE ADMIN SUITE)
   ============================================================== */

/* Sub-nav chuyển đổi chế độ xem (Bảng vs Cây phân cấp) */
.admin-subnav-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.25rem;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.segmented-control {
  display: inline-flex;
  background: #f1f2f6;
  padding: 3px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--apple-border);
}

.seg-btn {
  padding: 0.4rem 0.95rem;
  font-size: 0.82rem;
  font-weight: 600;
  border-radius: 6px;
  border: none;
  background: transparent;
  color: var(--apple-text-secondary);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  transition: all 0.2s var(--ease-apple);
}

.seg-btn.active {
  background: #ffffff;
  color: var(--apple-text);
  box-shadow: 0 1px 3px rgba(0,0,0,0.08);
}

/* Lưới Top 5 Cao nhất & Thấp nhất */
.top-ranking-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 1.25rem;
  margin-top: 1.25rem;
}

.rank-card {
  background: #ffffff;
  border: 1px solid var(--apple-border);
  border-radius: var(--radius-md);
  padding: 1.4rem;
  box-shadow: var(--shadow-subtle);
}

.rank-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
  padding-bottom: 0.65rem;
  border-bottom: 1px solid var(--apple-border);
}

.rank-item {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.65rem 0;
  border-bottom: 1px dashed #f1f5f9;
}

.rank-item:last-child {
  border-bottom: none;
}

.rank-badge {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.76rem;
  font-weight: 800;
  flex-shrink: 0;
}

.rank-badge.top { background: #dcfce7; color: #15803d; }
.rank-badge.bottom { background: #fee2e2; color: #b91c1c; }

/* Phổ điểm trắc nghiệm */
.score-dist-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 0.85rem;
  margin-top: 1rem;
}

.score-dist-card {
  background: #fafafc;
  border: 1px solid var(--apple-border);
  border-radius: var(--radius-sm);
  padding: 1rem;
  text-align: center;
}

.score-dist-value {
  font-size: 1.5rem;
  font-weight: 800;
  margin: 0.25rem 0;
  color: var(--apple-text);
}

/* Bảng phân cấp Cây Tổ chức Đảng (Tree Table) */
.tree-level-1 {
  background-color: #f8fafc;
  font-weight: 700;
}

.tree-level-1 td {
  border-top: 2px solid #e2e8f0;
}

.tree-level-2 td:first-child {
  padding-left: 2rem;
}

.tree-level-3 td:first-child {
  padding-left: 3.5rem;
}