/* ==========================================================================
   BEELIO V2.0 - HỆ THỐNG PHONG CÁCH HỌC ĐƯỜNG & KHẢO THÍ TIỂU HỌC (OFFLINE-FIRST)
   Warm Crafted EdTech — Dịu mắt, rõ ràng, chuẩn mực sư phạm GDPT 2018
   ========================================================================== */

:root {
  /* BẢNG MÀU TƯƠI SÁNG & ẤM ÁP CHO TRẺ TIỂU HỌC (WARM CRAFTED EDTECH) */
  --bg-primary: var(--beelio-paper, #FFF9EE);
  --bg-surface: var(--beelio-surface, #FFFFFF);
  --bg-surface-elevated: #FFFFFF;
  --bg-subtle: var(--beelio-cream, #F7F0E3);
  --bg-hover: #EFE6D5;

  --text-primary: var(--beelio-ink, #24324A);
  --text-secondary: #3E4E68;
  --text-muted: var(--beelio-text-muted, #5D6B80);
  --text-inverse: #FFFFFF;

  --border-color: var(--beelio-border, #D9E2EC);
  --border-focus: var(--beelio-blue, #2563EB);
  --border-subtle: #CBD5E1;

  /* HỆ MÀU CHỦ ĐẠO TIỂU HỌC */
  --primary-navy: #24324A;
  --primary-navy-dark: #1A2538;
  --primary-navy-light: #2563EB;
  --primary-navy-surface: #EAF2FF;

  /* MÔN TOÁN: CAM NĂNG LƯỢNG & VÀNG NẮNG */
  --kid-math-primary: #F47B20;
  --kid-math-dark: #D96510;
  --kid-math-surface: #FFF7ED;
  --kid-math-border: #FED7AA;

  /* MÔN TIẾNG VIỆT: HỒNG DÂU & ĐỎ SAN HÔ */
  --kid-viet-primary: #D6475D;
  --kid-viet-dark: #B9344A;
  --kid-viet-surface: #FFF1F2;
  --kid-viet-border: #FECDD3;

  /* MÔN TIẾNG ANH: XANH NGỌC & XANH LÁ VUI NHỘN */
  --kid-eng-primary: #168C68;
  --kid-eng-dark: #0F6E50;
  --kid-eng-surface: #ECFDF5;
  --kid-eng-border: #A7F3D0;

  /* HOA ĐIỂM 10 & SAO THƯỞNG */
  --flower-pink: #D6475D;
  --flower-red: #C83D45;
  --star-yellow: var(--beelio-gold, #F6B91A);
  --star-yellow-dark: #D97706;

  /* HỆ MÀU NHẤN CHUẨN KHẢO THÍ */
  --accent-crimson: var(--beelio-crimson, #C83D45);
  --accent-crimson-bg: #FFF1F2;
  --accent-emerald: var(--beelio-green, #2E9B55);
  --accent-emerald-bg: #ECFDF3;
  --accent-amber: #B86100;
  --accent-amber-bg: #FFFBEB;

  /* FONT CHỮ TRÒN TRỊA, THÂN THIỆN (100% LOCAL) */
  --font-main: 'Be Vietnam Pro', 'Nunito', 'Quicksand', -apple-system, sans-serif;
  --font-heading: 'Nunito', 'Quicksand', 'Be Vietnam Pro', sans-serif;
  --font-serif: Georgia, 'Times New Roman', serif;
  --font-mono: ui-monospace, Menlo, Consolas, monospace;

  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06), 0 2px 4px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 10px 24px -4px rgba(0, 0, 0, 0.08), 0 4px 8px -2px rgba(0, 0, 0, 0.04);
  --shadow-3d: 0 4px 0 rgba(0, 0, 0, 0.12);

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 24px;
  --radius-full: 9999px;
}

/* CHẾ ĐỘ GIẤY ẤM SEPIA (BẢO VỆ MẮT / ĐỌC LÂU KHÔNG MỎI) */
[data-theme="sepia"] {
  --bg-primary: #F7EFE1;
  --bg-surface: #FFF9ED;
  --bg-surface-elevated: #FFFDF7;
  --bg-subtle: #EEDFC7;
  --bg-hover: #E4D1B4;

  --text-primary: #382A1B;
  --text-secondary: #5A4733;
  --text-muted: #7D6750;
  --text-inverse: #FFF9ED;

  --border-color: #E2CFB4;
  --border-focus: #8B4513;
  --border-subtle: #C9B294;

  --primary-navy: #7A3E1D;
  --primary-navy-dark: #4A2411;
  --primary-navy-surface: #EFE2CE;

  --accent-crimson: #9B2226;
  --accent-crimson-bg: #F8E5E5;

  --accent-emerald: #2D6A4F;
  --accent-emerald-bg: #E3EFE9;

  --accent-amber: #B06900;
  --accent-amber-bg: #FAF0D6;
}

/* CHẾ ĐỘ BAN ĐÊM (DARK THEME / HỌC KHUYA) */
[data-theme="dark"] {
  --bg-primary: #0A0F1D;
  --bg-surface: #131B2E;
  --bg-surface-elevated: #1B2640;
  --bg-subtle: #1C2844;
  --bg-hover: #263556;

  --text-primary: #F8FAFC;
  --text-secondary: #CBD5E1;
  --text-muted: #94A3B8;
  --text-inverse: #0A0F1D;

  --border-color: #263556;
  --border-focus: #60A5FA;
  --border-subtle: #334469;

  --primary-navy: #3B82F6;
  --primary-navy-dark: #60A5FA;
  --primary-navy-surface: #1E293B;

  --accent-crimson: #EF4444;
  --accent-crimson-bg: #2C1818;

  --accent-emerald: #22C55E;
  --accent-emerald-bg: #132E1D;

  --accent-amber: #F59E0B;
  --accent-amber-bg: #2E2413;

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.6);
}

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

html, body {
  width: 100%;
  max-width: 100vw;
  overflow-x: hidden !important;
  position: relative;
}

body {
  font-family: var(--font-main);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

#app {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  width: 100%;
  max-width: 100vw;
  overflow-x: hidden;
}

.main-content-view,
.dashboard-wrapper,
.exam-catalog-section {
  width: 100%;
  max-width: 100%;
  min-width: 0;
  box-sizing: border-box;
}

.container-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 16px;
  width: 100%;
  min-width: 0;
  box-sizing: border-box;
}

/* MATERIAL SYMBOLS */
.icon {
  font-family: 'Material Symbols Outlined';
  font-weight: normal;
  font-style: normal;
  font-size: 18px;
  line-height: 1;
  display: inline-block;
  vertical-align: middle;
  letter-spacing: normal;
  text-transform: none;
  word-wrap: normal;
  white-space: nowrap;
  direction: ltr;
}

/* ==========================================================================
   TOP COUNTDOWN & ANNOUNCEMENT BAR (ẨN ĐỂ HEADER GỌN GÀNG, KHÔNG LỘN XỘN)
   ========================================================================== */
.exam-countdown-bar {
  display: none !important; /* Loại bỏ thanh màu xanh trên cùng để giao diện cực kỳ thoáng đãng, chuyên nghiệp */
}

/* ==========================================================================
   MAIN SITE HEADER & NAVIGATION (CHUYÊN NGHIỆP, THOÁNG ĐÃNG, KHÔNG BỊ BẺ DÒNG)
   ========================================================================== */
.main-site-header {
  background-color: var(--bg-surface);
  border-bottom: 1.5px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 300;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.04);
}

.main-site-header .container-inner {
  max-width: 1200px !important;
  margin: 0 auto !important;
  padding: 0 12px !important;
  width: 100% !important;
}

.header-layout {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 56px;
  width: 100%;
}

/* THANH DOCK HEADER TRUNG TÂM THỐNG NHẤT CANH GIỮA HOÀN HẢO */
.header-unified-bar {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  max-width: 100%;
}

.brand-block {
  display: flex;
  align-items: center;
  gap: 7px;
  cursor: pointer;
  user-select: none;
  flex-shrink: 0;
}

.header-nav-divider {
  width: 1.5px;
  height: 22px;
  background: #E2E8F0;
  flex-shrink: 0;
}

.header-left-zone {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.brand-block {
  display: flex;
  align-items: center;
  gap: 7px;
  cursor: pointer;
  user-select: none;
  flex-shrink: 0;
}

.brand-crest {
  width: 34px;
  height: 34px;
  min-width: 34px;
  background: linear-gradient(135deg, #FCD34D 0%, #F59E0B 50%, #EA580C 100%);
  color: #FFFFFF;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 8px rgba(245, 158, 11, 0.35);
  border-bottom: 2px solid #D97706;
  transition: transform 0.15s ease;
  flex-shrink: 0;
  position: relative;
  overflow: hidden;
}

.brand-block:hover .brand-crest {
  transform: rotate(-4deg) scale(1.06);
}

.brand-crest-bee-img {
  width: 90%;
  height: 90%;
  object-fit: contain;
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.2));
  transition: transform 0.2s ease;
}

.brand-block:hover .brand-crest-bee-img {
  transform: scale(1.12);
}

.brand-crest .icon {
  font-size: 18px;
}

.brand-titles {
  display: flex;
  flex-direction: column;
}

.brand-name {
  font-family: var(--font-heading, 'Nunito', sans-serif);
  font-size: 16px;
  font-weight: 900;
  color: #1E3A8A;
  letter-spacing: -0.3px;
  line-height: 1.1;
  white-space: nowrap !important;
}

.beelio-brand-name {
  display: flex;
  align-items: baseline;
  font-family: 'Nunito', 'Quicksand', sans-serif;
  font-size: 17px;
  font-weight: 900;
}

.brand-bee {
  color: #EA580C;
  font-weight: 950;
  letter-spacing: -0.2px;
}

.brand-lio {
  color: #1E3A8A;
  font-weight: 900;
}

.brand-tagline {
  font-size: 9.5px;
  color: #64748B;
  font-weight: 600;
  margin-top: 1px;
  white-space: nowrap !important;
}

/* ==========================================================================
   BỘ CHỌN KHỐI LỚP NGỮ CẢNH (GRADE CONTEXT DROPDOWN — CONTEXT BAR)
   ========================================================================== */
.mockup-subject-floating-bar,
.g4-subject-tabs {
  position: relative !important;
  z-index: 100 !important;
  overflow: visible !important;
}

.grade-context-dropdown {
  position: relative;
  display: inline-flex;
  align-items: center;
  z-index: 150 !important;
}

.grade-context-toggle-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: #FFFFFF;
  color: #1E293B;
  border: 1.5px solid #E2E8F0;
  padding: 6px 13px;
  border-radius: 999px;
  font-family: var(--font-heading, 'Nunito', sans-serif);
  font-size: 13.5px;
  font-weight: 800;
  cursor: pointer;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.02);
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  white-space: nowrap;
  user-select: none;
}

.grade-context-toggle-btn:hover {
  background: #F8FAFC;
  border-color: #CBD5E1;
  color: #0F172A;
  transform: translateY(-1px);
  box-shadow: 0 3px 8px rgba(0, 0, 0, 0.06);
}

.grade-context-dropdown.open .grade-context-toggle-btn {
  background: #EFF6FF;
  border-color: #93C5FD;
  color: #1D4ED8;
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.12);
}

/* ==========================================================================
   TỐI ƯU MÀU NỀN CÁC NÚT DỊU MẮT (EYE-FRIENDLY SOFT PASTEL PALETTE)
   Loại bỏ hoàn toàn màu xanh chói lóa gây mỏi mắt, đồng bộ phong cách Pastel cao cấp
   ========================================================================== */

/* 1. Môn học đang chọn (Active Tab) trên Context Bar */
.adventure-context-bar .g4-tab-btn.active,
.adventure-context-bar .mockup-subject-floating-btn.active {
  background: #EFF6FF !important;
  color: #1D4ED8 !important;
  border: 1.5px solid #93C5FD !important;
  box-shadow: 0 2px 6px rgba(37, 99, 235, 0.08) !important;
  transform: translateY(-1px) !important;
  font-weight: 800 !important;
}

.adventure-context-bar .g4-tab-btn:hover:not(.active),
.adventure-context-bar .mockup-subject-floating-btn:hover:not(.active) {
  color: #1E293B !important;
  background: rgba(241, 245, 249, 0.9) !important;
  transform: translateY(-1px) !important;
}

/* 2. Nút Bí Kíp Sư Phạm trên HUD Bar: Dịu mắt, ăn khớp cụm Badges Streak / Gems */
.g4-header-bar .g4-btn-bikip,
.g4-header-bar.g4-header-integrated .g4-btn-bikip {
  background: #EFF6FF !important;
  color: #1D4ED8 !important;
  border: 1px solid #BFDBFE !important;
  box-shadow: 0 1px 3px rgba(37, 99, 235, 0.1) !important;
  font-weight: 800 !important;
  text-shadow: none !important;
}

.g4-header-bar .g4-btn-bikip:hover,
.g4-header-bar.g4-header-integrated .g4-btn-bikip:hover {
  background: #DBEAFE !important;
  border-color: #93C5FD !important;
  color: #1E40AF !important;
  transform: translateY(-1px) !important;
  box-shadow: 0 2px 6px rgba(37, 99, 235, 0.16) !important;
}

/* 3. LOẠI BỎ TRIỆT ĐỂ VÒNG TRÒN / VẦNG HÀO QUANG QUANH Ô SỐ 1 Ở TẤT CẢ CÁC LỚP */
.hotspot-node-active::before,
.grade2-adventure-wrapper .hotspot-node-active::before,
.mockup-hotspot.hotspot-node-active,
.g4-node-anchor.g4-node-active .g4-puck-aura,
.g4-puck-aura {
  display: none !important;
  content: none !important;
  border: none !important;
  box-shadow: none !important;
  animation: none !important;
}

.grade-pill-icon {
  font-size: 15px;
  line-height: 1;
}

.grade-pill-text {
  letter-spacing: -0.2px;
}

.grade-pill-chevron {
  font-size: 11px;
  opacity: 0.85;
  transition: transform 0.2s ease;
  display: inline-block;
}

.grade-context-dropdown.open .grade-pill-chevron {
  transform: rotate(180deg);
}

.grade-context-menu {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  min-width: 250px;
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1.5px solid rgba(226, 232, 240, 0.95);
  border-radius: 16px;
  box-shadow: 0 14px 34px rgba(15, 23, 42, 0.16), 0 2px 6px rgba(15, 23, 42, 0.04);
  padding: 6px;
  z-index: 100;
  display: flex;
  flex-direction: column;
  gap: 3px;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateY(-6px);
  transition: all 0.18s cubic-bezier(0.16, 1, 0.3, 1);
}

.grade-context-dropdown.open .grade-context-menu {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateY(0);
}

.grade-context-menu::before {
  content: '';
  position: absolute;
  top: -6px;
  left: 24px;
  transform: rotate(45deg);
  width: 10px;
  height: 10px;
  background: #FFFFFF;
  border-left: 1.5px solid rgba(226, 232, 240, 0.95);
  border-top: 1.5px solid rgba(226, 232, 240, 0.95);
}

.grade-context-option {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  border-radius: 11px;
  background: transparent;
  border: none;
  cursor: pointer;
  text-align: left;
  width: 100%;
  transition: background-color 0.15s ease, transform 0.1s ease;
  user-select: none;
}

.grade-context-option:hover {
  background-color: #F1F5F9;
  transform: translateX(2px);
}

.grade-context-option.active {
  background: linear-gradient(135deg, #EFF6FF 0%, #DBEAFE 100%);
  border-left: 3.5px solid #2563EB;
}

.grade-context-option .opt-icon {
  font-size: 20px;
  flex-shrink: 0;
  line-height: 1;
}

.grade-context-option .opt-details {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-width: 0;
}

.grade-context-option .opt-label {
  font-family: var(--font-heading, 'Nunito', sans-serif);
  font-size: 14px;
  font-weight: 800;
  color: #1E293B;
  line-height: 1.2;
}

.grade-context-option.active .opt-label {
  color: #1E40AF;
}

.grade-context-option .opt-desc {
  font-size: 11px;
  color: #64748B;
  font-weight: 600;
  line-height: 1.2;
  margin-top: 1px;
}

.grade-context-option .opt-check {
  font-size: 14px;
  font-weight: 900;
  color: #2563EB;
  margin-left: auto;
}

.context-bar-divider {
  width: 1.5px;
  height: 22px;
  background: #CBD5E1;
  margin: 0 4px;
  flex-shrink: 0;
}

/* Đảm bảo thanh Context Bar co giãn tốt trên mọi thiết bị, giữ dropdown mở tự nhiên và cuộn ngang mượt cho các nút môn học */
.adventure-context-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: nowrap;
  max-width: 100%;
  box-sizing: border-box;
  overflow: visible !important;
}

.beelio-subject-scroll-strip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  flex: 1 1 auto;
  min-width: 0;
  overflow-x: auto;
  overflow-y: visible;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
  padding: 2px 4px 2px 0;
}

.beelio-subject-scroll-strip::-webkit-scrollbar {
  display: none;
}

.beelio-subject-scroll-strip > button {
  flex-shrink: 0;
  white-space: nowrap;
}

@media (max-width: 640px) {
  .adventure-context-bar {
    width: 100% !important;
    max-width: calc(100vw - 16px) !important;
    padding: 4px 8px !important;
    gap: 5px !important;
    justify-content: flex-start !important;
  }
  .grade-context-toggle-btn {
    padding: 5px 10px !important;
    font-size: 12.5px !important;
  }
  .beelio-subject-scroll-strip {
    gap: 5px;
    mask-image: linear-gradient(to right, #000 90%, transparent 100%);
    -webkit-mask-image: linear-gradient(to right, #000 90%, transparent 100%);
    padding-right: 14px;
  }
  .adventure-context-bar .g4-tab-btn,
  .adventure-context-bar .mockup-subject-floating-btn {
    padding: 5px 10px !important;
    font-size: 12px !important;
  }
}

/* THANH ĐIỀU HƯỚNG CHÍNH - LIỀN MẠCH, SEGMENTED DOCK CAO CẤP */
.main-navigation {
  display: flex;
  align-items: center;
  gap: 3px;
  background: #F8FAFC;
  padding: 3px 4px;
  border-radius: 10px;
  border: 1px solid #E2E8F0;
  flex-shrink: 0;
}

.nav-item-btn {
  background: transparent;
  border: none;
  color: #475569;
  font-family: var(--font-heading, 'Nunito', sans-serif);
  font-size: 13px;
  font-weight: 750;
  padding: 6px 12px;
  border-radius: 7px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all 0.16s ease;
  white-space: nowrap !important;
  user-select: none;
  border-bottom: none;
}

.nav-item-btn .icon {
  font-size: 17px;
  color: #64748B;
  transition: color 0.16s ease;
}

.nav-item-btn:hover {
  background-color: #FFFFFF;
  color: #0F172A;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.nav-item-btn.active {
  background-color: #FFFFFF;
  color: #1E3A8A;
  font-weight: 850;
  box-shadow: 0 1px 4px rgba(30, 58, 138, 0.14);
  border-bottom: none;
}

.nav-item-btn.active .icon {
  color: #2563EB;
}

/* DROPDOWN GÓC HỌC TẬP (FROSTED GLASSMORPHISM) */
.header-dropdown {
  position: relative;
  display: inline-flex;
  align-items: center;
}

.dropdown-toggle {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  user-select: none;
}

.dropdown-arrow {
  font-size: 11px;
  color: #64748B;
  transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  display: inline-block;
  line-height: 1;
}

.header-dropdown.open .dropdown-arrow {
  transform: rotate(180deg);
}

.header-dropdown.open .dropdown-toggle {
  background-color: var(--primary-navy-surface);
  color: var(--primary-navy);
  border-bottom: 2px solid var(--primary-navy-light);
}

.header-dropdown-menu {
  position: absolute;
  top: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%) translateY(-6px);
  min-width: 250px;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1.5px solid rgba(226, 232, 240, 0.95);
  border-radius: 14px;
  box-shadow: 0 12px 32px rgba(15, 23, 42, 0.12), 0 2px 6px rgba(15, 23, 42, 0.04);
  padding: 6px;
  z-index: 150;
  display: flex;
  flex-direction: column;
  gap: 2px;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: all 0.18s cubic-bezier(0.16, 1, 0.3, 1);
}

.header-dropdown.open .header-dropdown-menu {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}

.header-dropdown-menu::before {
  content: '';
  position: absolute;
  top: -6px;
  left: 50%;
  transform: translateX(-50%) rotate(45deg);
  width: 10px;
  height: 10px;
  background: #FFFFFF;
  border-left: 1.5px solid rgba(226, 232, 240, 0.95);
  border-top: 1.5px solid rgba(226, 232, 240, 0.95);
}

.dropdown-item-btn {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  border-radius: 9px;
  background: transparent;
  border: none;
  cursor: pointer;
  text-align: left;
  width: 100%;
  transition: background-color 0.15s ease, transform 0.1s ease;
  user-select: none;
}

.dropdown-item-btn:hover {
  background-color: #F1F5F9;
  transform: translateX(2px);
}

.dropdown-item-btn.active {
  background-color: #EFF6FF;
  border-left: 3px solid #2563EB;
}

.dropdown-item-icon {
  font-size: 18px;
  flex-shrink: 0;
  line-height: 1;
}

.dropdown-item-info {
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.dropdown-item-title {
  font-family: var(--font-heading, 'Nunito', sans-serif);
  font-size: 13px;
  font-weight: 750;
  color: #1E293B;
  line-height: 1.2;
}

.dropdown-item-title.highlight-gold {
  color: #B45309;
}

.dropdown-item-desc {
  font-size: 11px;
  color: #64748B;
  font-weight: 500;
  line-height: 1.2;
}

.dropdown-menu-divider {
  height: 1px;
  background: #E2E8F0;
  margin: 4px 6px;
}

.btn-quick-practice-item {
  background: #FEF3C7;
  border-radius: 9px;
}

.btn-quick-practice-item:hover {
  background: #FDE68A;
}

/* ==========================================================================
   UNIFIED SEGMENTED UTILITIES (CỤM TIỆN ÍCH THANH MẢNH ĐỒNG BỘ VỚI MAIN NAV)
   ========================================================================== */
.header-utilities {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  background: #F8FAFC;
  padding: 3px 4px;
  border-radius: 10px;
  border: 1px solid #E2E8F0;
  flex-shrink: 0;
}

[data-theme="sepia"] .header-utilities {
  background: #F3E9D7;
  border-color: #DECBB1;
}

[data-theme="dark"] .header-utilities {
  background: #162036;
  border-color: #263556;
}

.util-dock-sep {
  width: 1px;
  height: 14px;
  background: #E2E8F0;
  margin: 0 1px;
  flex-shrink: 0;
}

[data-theme="sepia"] .util-dock-sep {
  background: #DECBB1;
}

[data-theme="dark"] .util-dock-sep {
  background: #293A5E;
}

.util-capsule {
  height: 28px;
  padding: 0 10px;
  border-radius: 7px;
  display: inline-flex;
  align-items: center;
  gap: 5.5px;
  font-family: var(--font-heading, 'Nunito', sans-serif);
  font-size: 12.5px;
  font-weight: 700;
  color: #475569;
  background: transparent;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background-color 0.15s ease, color 0.15s ease, box-shadow 0.15s ease;
  white-space: nowrap;
  user-select: none;
  box-sizing: border-box;
}

.util-capsule:hover {
  background-color: #FFFFFF;
  color: #0F172A;
  box-shadow: 0 1px 3px rgba(15, 23, 42, 0.06);
}

[data-theme="sepia"] .util-capsule {
  color: #5A4733;
}

[data-theme="sepia"] .util-capsule:hover {
  background-color: #FFFDF7;
  color: #382A1B;
}

[data-theme="dark"] .util-capsule {
  color: #CBD5E1;
}

[data-theme="dark"] .util-capsule:hover {
  background-color: #1F2D4A;
  color: #F8FAFC;
}

.capsule-icon {
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

/* Item 1: Sửa Sai */
.mistake-capsule {
  color: #475569;
}

.mistake-capsule:hover {
  color: #B45309;
}

.mistake-capsule.active {
  background: #FFFFFF;
  color: #B45309;
  font-weight: 800;
  box-shadow: 0 1px 4px rgba(180, 83, 9, 0.12);
}

.capsule-badge {
  background-color: #EF4444;
  color: #FFFFFF;
  font-size: 10px;
  font-weight: 800;
  padding: 1px 5px;
  border-radius: 999px;
  line-height: 1.2;
}

/* Item 2: Pomodoro */
.pomo-capsule {
  color: #475569;
}

.pomo-capsule .capsule-icon {
  color: #64748B;
}

.pomo-capsule:hover .capsule-icon {
  color: #2563EB;
}

.pomo-val {
  font-family: var(--font-heading, 'Nunito', sans-serif);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: 12.5px;
  letter-spacing: -0.1px;
}

/* Item 3: Kim Cương BEElio */
.gem-capsule {
  cursor: default;
}

.gem-val {
  font-family: var(--font-heading, 'Nunito', sans-serif);
  font-variant-numeric: tabular-nums;
  font-weight: 750;
  font-size: 12.5px;
  color: #1E3A8A;
  letter-spacing: -0.1px;
}

[data-theme="dark"] .gem-val {
  color: #93C5FD;
}

/* ==========================================================================
   POMODORO TIMER POPOVER
   ========================================================================== */
.pomo-popover {
  position: fixed;
  top: 76px;
  right: 20px;
  width: 310px;
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  z-index: 200;
  overflow: hidden;
}

.pomo-popover.hidden {
  display: none;
}

.pomo-popover-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  background-color: var(--primary-navy);
  color: #FFFFFF;
  font-weight: 600;
  font-size: 14px;
}

.btn-close-pomo {
  background: transparent;
  border: none;
  color: #FFFFFF;
  cursor: pointer;
}

.pomo-body {
  padding: 18px;
  text-align: center;
}

.pomo-mode-badge {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.pomo-digits {
  font-size: 44px;
  font-weight: 800;
  font-family: var(--font-mono);
  color: var(--text-primary);
  margin-bottom: 14px;
}

.pomo-mode-select {
  display: flex;
  background-color: var(--bg-subtle);
  padding: 3px;
  border-radius: var(--radius-sm);
  margin-bottom: 14px;
}

.pomo-tab {
  flex: 1;
  background: transparent;
  border: none;
  padding: 6px;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  border-radius: 4px;
  cursor: pointer;
}

.pomo-tab.active {
  background-color: var(--bg-surface);
  color: var(--text-primary);
  box-shadow: var(--shadow-sm);
}

.pomo-controls {
  display: flex;
  gap: 8px;
}

.btn-pomo-action {
  flex: 1;
  background-color: var(--primary-navy);
  color: #FFFFFF;
  border: none;
  padding: 8px;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 13px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.btn-pomo-reset {
  background-color: var(--bg-subtle);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
}

/* ==========================================================================
   GRADE SELECTOR & CURRICULUM LEVELS
   ========================================================================== */
.grade-selector-section {
  padding: 36px 0 24px 0;
  background: linear-gradient(180deg, var(--bg-surface) 0%, var(--bg-primary) 100%);
  border-bottom: 1px solid var(--border-color);
}

.section-badge {
  display: inline-block;
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.8px;
  color: var(--primary-navy);
  background-color: var(--primary-navy-surface);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  margin-bottom: 8px;
}

.section-title {
  font-size: 26px;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 6px;
  letter-spacing: -0.5px;
}

.section-desc {
  color: var(--text-secondary);
  font-size: 15px;
  margin-bottom: 24px;
}

.curriculum-levels-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.level-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 16px;
  transition: all 0.2s ease;
}

.level-card.active-level {
  border-color: var(--primary-navy);
  box-shadow: 0 0 0 1px var(--primary-navy), var(--shadow-sm);
  background-color: var(--bg-surface-elevated);
}

.level-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}

.level-icon {
  width: 32px;
  height: 32px;
  background-color: var(--bg-subtle);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-navy);
  font-size: 18px;
}

.level-name {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
}

.level-sub {
  font-size: 12px;
  color: var(--text-muted);
}

.grade-buttons-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.grade-chip {
  background-color: var(--bg-subtle);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-family: var(--font-main);
  font-size: 13px;
  font-weight: 600;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.15s ease;
}

.grade-chip:hover {
  background-color: var(--bg-hover);
  color: var(--text-primary);
}

.grade-chip.active {
  background-color: var(--primary-navy);
  color: #FFFFFF;
  border-color: var(--primary-navy);
  font-weight: 700;
}

/* ==========================================================================
   EXAM CATALOG & FILTER PANEL
   ========================================================================== */
.exam-catalog-section {
  padding: 24px 0 60px 0;
}

.filter-panel-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  margin-bottom: 24px;
  box-shadow: var(--shadow-sm);
}

.filter-controls-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr) 1.5fr;
  gap: 16px;
  align-items: flex-end;
}

.filter-col {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.filter-label {
  font-size: 12.5px;
  font-weight: 700;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 5px;
}

.filter-select, .search-input {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  font-family: var(--font-main);
  font-size: 13.5px;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  outline: none;
  transition: border-color 0.15s;
}

.filter-select:focus, .search-input:focus {
  border-color: var(--border-focus);
}

.unified-textbook-box {
  background-color: var(--primary-navy-surface);
  border: 1.5px solid var(--primary-navy);
  color: var(--primary-navy);
  font-size: 13px;
  font-weight: 700;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  gap: 6px;
}

.unified-textbook-box .icon {
  color: var(--primary-navy);
  font-size: 16px;
}

.footer-unified-block {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.f-textbook-badge {
  color: #93C5FD;
  font-weight: 700;
  font-size: 13.5px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.catalog-header-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
  flex-wrap: wrap;
  gap: 10px;
}

.catalog-title-group {
  display: flex;
  align-items: center;
  gap: 12px;
}

.catalog-title-group h3 {
  font-size: 18px;
  font-weight: 800;
  color: var(--text-primary);
}

.exam-count-badge {
  background-color: var(--bg-subtle);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  font-size: 12px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 12px;
}

.catalog-hint {
  font-size: 13px;
  color: var(--text-muted);
  display: flex;
  align-items: flex-start;
  gap: 6px;
  line-height: 1.5;
  margin-top: 4px;
}

.catalog-hint .hint-icon {
  font-size: 18px;
  color: #F59E0B;
  flex-shrink: 0;
  margin-top: 2px;
}

.catalog-hint .hint-text {
  flex: 1;
  line-height: 1.5;
}

/* ==========================================================================
   EXAMS GRID & EXAM CARDS
   ========================================================================== */
.exams-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  gap: 20px;
}

.exam-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-sm);
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
}

.exam-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--border-subtle);
}

.exam-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.exam-badge-row {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.badge-grade {
  background-color: var(--primary-navy);
  color: #FFFFFF;
  font-size: 11px;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 4px;
  letter-spacing: 0.5px;
}

.badge-period {
  background-color: var(--accent-crimson-bg);
  color: var(--accent-crimson);
  font-size: 11px;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 4px;
}

.badge-textbook {
  background-color: var(--bg-subtle);
  color: var(--text-secondary);
  font-size: 11px;
  font-weight: 600;
  padding: 2px 6px;
  border-radius: 4px;
}

.exam-code-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  color: var(--text-muted);
}

.exam-card-main {
  flex: 1;
  margin-bottom: 14px;
}

.exam-subject-indicator {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12.5px;
  font-weight: 700;
  color: var(--primary-navy);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.exam-card-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.4;
  margin-bottom: 6px;
}

.exam-school-name {
  font-size: 12.5px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 5px;
  margin-bottom: 10px;
}

.exam-summary {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* MA TRẬN ĐỀ THI THANH TIẾN ĐỘ */
.exam-matrix-bar {
  display: flex;
  height: 6px;
  border-radius: 3px;
  overflow: hidden;
  margin: 12px 0 4px 0;
  background-color: var(--bg-subtle);
}

.m-rec { background-color: #3B82F6; }
.m-comp { background-color: #10B981; }
.m-app { background-color: #F59E0B; }

.matrix-legend {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.exam-card-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 0;
  border-top: 1px dashed var(--border-color);
  border-bottom: 1px dashed var(--border-color);
  margin-bottom: 14px;
}

.meta-pill {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 4px;
}

.exam-card-footer {
  display: flex;
  align-items: center;
  gap: 8px;
}

.btn-start-exam {
  flex: 1;
  background-color: var(--primary-navy);
  color: #FFFFFF;
  border: none;
  font-family: var(--font-main);
  font-size: 13.5px;
  font-weight: 700;
  padding: 9px 14px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  transition: background-color 0.15s ease;
}

.btn-start-exam:hover {
  background-color: #1d4ed8;
}

.btn-print-exam {
  background-color: var(--bg-subtle);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-family: var(--font-main);
  font-size: 13px;
  font-weight: 600;
  padding: 9px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 5px;
  transition: all 0.15s;
}

.btn-print-exam:hover {
  background-color: var(--bg-hover);
  color: var(--text-primary);
}

.no-exams-box {
  grid-column: 1 / -1;
  text-align: center;
  padding: 60px 20px;
  background-color: var(--bg-surface);
  border: 1px dashed var(--border-color);
  border-radius: var(--radius-md);
}

.no-exams-box .icon {
  font-size: 48px;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.no-exams-box h4 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 6px;
}

.no-exams-box p {
  color: var(--text-muted);
  margin-bottom: 16px;
}

/* ==========================================================================
   FOOTER CHUẨN MỰC
   ========================================================================== */
.main-site-footer {
  display: none !important;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1.2fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
}

.footer-about .brand-name-f {
  font-size: 20px;
  font-weight: 800;
  color: #FFFFFF;
  margin-bottom: 10px;
}

.footer-about p {
  line-height: 1.6;
  margin-bottom: 14px;
}

.cert-text {
  font-size: 12px;
  color: #64748B;
  font-weight: 600;
}

.footer-links-col h4 {
  font-size: 14px;
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: 14px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.footer-links-col ul {
  list-style: none;
}

.footer-links-col li {
  margin-bottom: 8px;
}

.footer-links-col a {
  color: #94A3B8;
  text-decoration: none;
  transition: color 0.15s;
}

.footer-links-col a:hover {
  color: #FFFFFF;
}

.footer-bottom-bar {
  border-top: 1px solid #1E293B;
  padding: 16px 0;
  text-align: center;
  font-size: 12px;
  color: #64748B;
}

/* ==========================================================================
   CHUYÊN BIỆT TIỂU HỌC: BỘ CHUYỂN BẠN HỌC & GIAO DIỆN LỚP 2 & LỚP 4
   ========================================================================== */

/* 1. BỘ CHUYỂN LỚP TRÊN HEADER (CLEAN SEGMENTED CONTROL - KHÔNG BONG BÓNG AI) */
.kid-switcher-header {
  display: flex;
  align-items: center;
  gap: 2px;
  background-color: #F1F5F9;
  padding: 3px;
  border-radius: 8px;
  border: 1px solid #CBD5E1;
  flex-shrink: 0;
}

.kid-pill-btn {
  background: transparent;
  border: none;
  border-radius: 6px;
  padding: 6px 14px;
  font-family: var(--font-main);
  font-size: 13.5px;
  font-weight: 700;
  color: #475569;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all 0.15s ease;
  white-space: nowrap !important;
}

.kid-pill-btn small {
  display: none !important; /* Ẩn phần tuổi để header gọn gàng, tránh rườm rà */
}

.kid-pill-btn:hover {
  color: #0F172A;
  background-color: rgba(255, 255, 255, 0.6);
}

.kid-pill-btn.active {
  background-color: #FFFFFF;
  color: #1E3A8A;
  font-weight: 800;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  border: 1px solid #CBD5E1;
}

/* Huy hiệu giỏ hoa điểm 10 trên header */
.gio-hoa-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background: #FFF1F2;
  border: 1px solid #FECDD3;
  padding: 5px 12px;
  border-radius: 20px;
  font-family: var(--font-main);
  font-size: 13px;
  font-weight: 700;
  color: #BE123C;
  white-space: nowrap !important;
  flex-shrink: 0;
}

/* 2. TRIỆT TIÊU HOÀN TOÀN SỰ TRÙNG LẶP:
      Ẩn hoàn toàn khối 2 thẻ to đùng và banner AI chào hỏi thừa thãi.
      Người dùng chọn Lớp trên Header là xem NGAY kho đề thi bên dưới! */
.kid-hero-banner {
  display: none !important;
}

.simple-filter-card {
  background-color: #FFFFFF;
  border: 1px solid #E2E8F0;
  border-radius: 10px;
  padding: 12px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 16px;
  margin-bottom: 20px;
  flex-wrap: wrap;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
  width: 100%;
  max-width: 100%;
  min-width: 0;
  box-sizing: border-box;
  overflow: visible;
  position: relative;
  z-index: 20;
}

.subject-pills-row {
  display: flex;
  align-items: center;
  gap: 6px;
  overflow: visible;
  flex-wrap: wrap;
  white-space: nowrap;
  padding-bottom: 2px;
  width: 100%;
  max-width: 100%;
  min-width: 0;
  box-sizing: border-box;
  position: relative;
  z-index: 30;
}

.subject-pills-row::-webkit-scrollbar {
  display: none;
  width: 0;
  height: 0;
}

.subj-tab-btn {
  background-color: #F8FAFC;
  border: 1px solid #E2E8F0;
  color: #475569;
  font-family: var(--font-main);
  font-size: 13.5px;
  font-weight: 600;
  padding: 7px 14px;
  border-radius: 6px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all 0.15s ease;
  user-select: none;
}

.subj-tab-btn:hover {
  background-color: #F1F5F9;
  color: #0F172A;
  border-color: #CBD5E1;
}

.subj-tab-btn.active {
  background-color: #1E3A8A !important;
  color: #FFFFFF !important;
  border-color: #1E3A8A !important;
  font-weight: 700;
}

.simple-search-row {
  flex: 1;
  max-width: 340px;
  min-width: 220px;
}

.search-input-wrap {
  position: relative !important;
  width: 100%;
  display: flex;
  align-items: center;
}

.search-icon {
  position: absolute;
  left: 10px;
  top: 50%;
  transform: translateY(-50%);
  color: #94A3B8;
  font-size: 18px;
  pointer-events: none;
  z-index: 2;
}

.search-input {
  width: 100%;
  border-radius: 6px;
  border: 1px solid #CBD5E1;
  padding: 8px 32px 8px 34px;
  font-family: var(--font-main);
  font-size: 13.5px;
  background-color: #F8FAFC;
  box-sizing: border-box;
}

.search-input:focus {
  background-color: #FFFFFF;
  border-color: #1E3A8A;
  box-shadow: 0 0 0 2px rgba(30, 58, 138, 0.1);
}

.btn-clear-search {
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: #94A3B8;
  cursor: pointer;
  padding: 2px;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2;
}

.btn-clear-search:hover {
  color: #0F172A;
}

/* 4. THẺ ĐỀ THI HỌC ĐƯỜNG CHUẨN BỘ GIÁO DỤC (ACADEMIC MODERN EXAM CARD) */
.primary-exam-card {
  background: #FFFFFF;
  border: 1px solid #E2E8F0;
  border-radius: 12px;
  padding: 20px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all 0.2s ease;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
  position: relative;
  overflow: hidden;
}

.primary-exam-card:hover {
  border-color: #94A3B8;
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.08);
  transform: translateY(-2px);
}

.exam-card-title {
  font-family: var(--font-main);
  font-size: 17px;
  font-weight: 700;
  color: #0F172A;
  line-height: 1.4;
  margin: 10px 0 6px 0;
}

.exam-school-name {
  font-size: 12.5px;
  color: #64748B;
  display: flex;
  align-items: center;
  gap: 5px;
  margin-bottom: 8px;
}

.exam-summary {
  font-size: 13px;
  color: #475569;
  line-height: 1.5;
  margin-bottom: 14px;
}

.badge-subject {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 11.5px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 4px;
}

.badge-subject.subj-math {
  background-color: #EFF6FF;
  color: #1E40AF;
  border: 1px solid #BFDBFE;
}

.badge-subject.subj-viet {
  background-color: #FEF2F2;
  color: #B91C1C;
  border: 1px solid #FECACA;
}

.badge-subject.subj-eng {
  background-color: #F0FDF4;
  color: #047857;
  border: 1px solid #BBF7D0;
}

/* NÚT HÀNH ĐỘNG TRANG NHÃ, CHUYÊN NGHIỆP */
.btn-start-exam {
  background: #1E3A8A;
  color: #FFFFFF;
  border: none;
  border-radius: 8px;
  padding: 9px 18px;
  font-family: var(--font-main);
  font-size: 14px;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn-start-exam:hover {
  background: #1D4ED8;
  transform: translateY(-1px);
}

.btn-print-exam {
  background: #FFFFFF;
  color: #475569;
  border: 1px solid #CBD5E1;
  border-radius: 8px;
  padding: 8px 14px;
  font-family: var(--font-main);
  font-size: 13.5px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn-print-exam:hover {
  background: #F8FAFC;
  color: #0F172A;
  border-color: #94A3B8;
}

/* Toggle trong Sổ tay & Lộ trình */
.cheat-grade-toggle-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 14px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-secondary);
}

.mini-grade-chip {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-family: var(--font-main);
  font-size: 13px;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: 16px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.mini-grade-chip:hover {
  background-color: var(--bg-hover);
  color: var(--text-primary);
}

.mini-grade-chip.active {
  background-color: var(--primary-navy);
  color: #FFFFFF;
  border-color: var(--primary-navy);
}

.plan-progress-card {
  margin-top: 16px;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 12px 16px;
}

.plan-progress-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13.5px;
  margin-bottom: 8px;
}

.plan-reward-badge {
  font-size: 12px;
  font-weight: 700;
  color: #B45309;
  background-color: #FEF3C7;
  padding: 3px 8px;
  border-radius: 12px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.day-duration-badge {
  font-size: 11px;
  color: var(--text-muted);
  font-weight: 600;
  margin-top: 4px;
}

.empty-catalog-card {
  grid-column: 1 / -1;
  text-align: center;
  padding: 48px 24px;
  background-color: var(--bg-surface);
  border: 1px dashed var(--border-color);
  border-radius: var(--radius-md);
}

.empty-icon {
  font-size: 40px;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.btn-reset-filters {
  margin-top: 16px;
  background-color: var(--primary-navy);
  color: #FFFFFF;
  border: none;
  padding: 8px 18px;
  border-radius: var(--radius-sm);
  font-family: var(--font-main);
  font-size: 13.5px;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

/* ==========================================================================
   THANH THÔNG TIN BỘ SÁCH GỌN GÀNG (TOP STRIP) & BANNER COMPACT
   ========================================================================== */
.exam-top-strip {
  display: none !important;
}

.top-strip-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.strip-pill {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: rgba(255, 255, 255, 0.18);
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
}

.strip-text {
  flex: 1;
  text-align: center;
}

.strip-current {
  font-size: 12px;
  color: #FEF08A;
}

.kid-hero-compact {
  background: #FFFFFF;
  border-bottom: 1px solid #E2E8F0;
  padding: 12px 0;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.03);
}

.compact-hero-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.student-profile-chip {
  display: flex;
  align-items: center;
  gap: 12px;
}

.chip-avatar {
  font-size: 26px;
  width: 44px;
  height: 44px;
  background: #EFF6FF;
  border: 1px solid #BFDBFE;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.chip-title {
  font-size: 15px;
  font-weight: 700;
  color: #1E293B;
  line-height: 1.3;
}

.chip-age {
  font-weight: 400;
  color: #64748B;
  font-size: 13px;
}

.chip-sub {
  font-size: 12.5px;
  color: #64748B;
  margin-top: 2px;
}

.hero-actions-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.grade-toggle-pills {
  display: inline-flex;
  background: #F1F5F9;
  padding: 3px;
  border-radius: 8px;
  border: 1px solid #E2E8F0;
}

.grade-pill-toggle {
  background: transparent;
  border: none;
  padding: 6px 14px;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 600;
  color: #475569;
  cursor: pointer;
  transition: all 0.15s ease;
}

.grade-pill-toggle.active {
  background: #2563EB;
  color: #FFFFFF;
  font-weight: 700;
  box-shadow: 0 1px 3px rgba(37, 99, 235, 0.25);
}

.btn-hero-quick-practice {
  background: #EA580C;
  color: #FFFFFF;
  border: none;
  padding: 7px 14px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  box-shadow: 0 2px 4px rgba(234, 88, 12, 0.2);
  transition: all 0.15s ease;
}

.btn-hero-quick-practice:hover {
  background: #C2410C;
  transform: translateY(-1px);
}

/* ==========================================================================
   MOBILE BOTTOM NAVIGATION (CỐ ĐỊNH ĐÁY MÀN HÌNH CHO SMARTPHONE & TABLET)
   ========================================================================== */
.mobile-bottom-nav {
  display: none; /* Mặc định ẩn trên desktop */
}

/* ==========================================================================
   RESPONSIVE DESIGN CHO MỌI THIẾT BỊ DI ĐỘNG (TABLETS, PHONES)
   ========================================================================== */
@media (max-width: 1024px) {
  .header-layout {
    gap: 8px;
  }
  .brand-titles .brand-tagline {
    display: none;
  }
  .nav-item-btn {
    padding: 5px 7px;
    font-size: 11.5px;
    gap: 3px;
  }
  .header-utilities {
    gap: 4px;
  }
  .theme-dropdown {
    max-width: 90px;
    padding: 3px 5px;
    font-size: 11px;
  }
  .exams-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  /* Ẩn navigation desktop, divider, nút sửa sai trên header (đã có ở bottom bar), và theme capsule */
  .desktop-only-nav,
  .header-nav-divider,
  .exam-top-strip,
  .theme-switcher-box,
  .theme-capsule,
  .mistake-capsule,
  .mistake-nav-pill {
    display: none !important;
  }

  /* Padding an toàn cho màn hình di động có thanh điều hướng đáy */
  body {
    padding-bottom: calc(64px + env(safe-area-inset-bottom, 0px)) !important;
  }

  .main-content-view {
    padding-bottom: 24px;
  }

  /* Header di động: Gọn gàng, vừa khít một hàng không bị bẻ dòng */
  .main-site-header .container-inner {
    padding: 0 10px !important;
  }

  .header-layout {
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    height: 52px !important;
    overflow: visible !important;
  }

  .header-unified-bar {
    display: flex !important;
    align-items: center !important;
    justify-content: space-between !important;
    width: 100% !important;
    gap: 8px !important;
  }

  .desktop-only-divider,
  .desktop-only-nav {
    display: none !important;
  }

  .brand-crest {
    width: 28px !important;
    height: 28px !important;
    min-width: 28px !important;
    border-radius: 7px !important;
  }

  .brand-crest-bee-img {
    width: 86% !important;
    height: 86% !important;
  }

  .brand-titles .brand-name {
    font-size: 14px !important;
    letter-spacing: -0.2px !important;
    white-space: nowrap !important;
  }

  .brand-titles .brand-tagline {
    display: none !important; /* Ẩn slogan phụ trên điện thoại để đỉnh đầu cực kỳ tinh gọn */
  }

  .header-utilities {
    margin-left: auto !important;
    display: inline-flex !important;
    align-items: center !important;
    gap: 2px !important;
    padding: 2px 3px !important;
    border-radius: 9px !important;
    z-index: 20 !important;
  }

  .header-utilities .mistake-capsule,
  .header-utilities .desktop-only-sep {
    display: none !important; /* Đã có nút Sửa Sai trực tiếp tại Mobile Bottom Nav */
  }

  .header-utilities .pomo-capsule,
  .header-utilities .gem-capsule {
    height: 26px !important;
    padding: 0 6px !important;
    font-size: 11.5px !important;
    gap: 4px !important;
  }

  .header-utilities .pomo-capsule .capsule-icon,
  .header-utilities .gem-capsule .capsule-icon {
    font-size: 13px !important;
  }

  .catalog-header-bar {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
    margin-bottom: 14px;
  }

  .catalog-title-group {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
  }

  .catalog-title-group h3 {
    font-size: 16px;
  }

  .gio-hoa-badge {
    font-size: 11.5px;
    padding: 4px 7px;
  }

  .pomo-trigger {
    padding: 4px 7px;
    font-size: 11.5px;
  }

  /* Popover Pomodoro co giãn an toàn, không bao giờ tràn mép trái màn hình nhỏ (320px-360px) */
  .pomo-popover {
    top: 54px !important;
    right: 12px !important;
    left: auto !important;
    width: min(310px, calc(100vw - 24px)) !important;
    max-width: calc(100vw - 24px) !important;
    z-index: 1100 !important;
  }

  /* Compact Action Banner cho #btn-jump-beelio-path trên Mobile & Tablet nhỏ (<= 768px) */
  .dashboard-wrapper > .container-inner:first-child {
    margin-top: 10px !important;
    margin-bottom: -12px !important;
  }

  #btn-jump-beelio-path,
  .btn-jump-beelio-card {
    padding: 11px 14px !important;
    border-radius: 16px !important;
    gap: 10px 12px !important;
    align-items: center !important;
    width: 100% !important;
    max-width: 100% !important;
    box-sizing: border-box !important;
  }

  #btn-jump-beelio-path > div:first-child,
  .btn-jump-beelio-card > div:first-child {
    flex: 1 1 0% !important;
    min-width: 0 !important;
    gap: 10px !important;
    align-items: center !important;
  }

  #btn-jump-beelio-path > div:first-child > span:first-child,
  .btn-jump-beelio-card > div:first-child > span:first-child {
    flex: 0 0 38px !important;
    width: 38px !important;
    height: 38px !important;
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    font-size: 26px !important;
  }

  #btn-jump-beelio-path > div:first-child > span:first-child img,
  .btn-jump-beelio-card > div:first-child > span:first-child img {
    width: 38px !important;
    height: 38px !important;
  }

  #btn-jump-beelio-path > div:first-child > div,
  .btn-jump-beelio-card > div:first-child > div {
    flex: 1 1 0% !important;
    min-width: 0 !important;
  }

  #btn-jump-beelio-path > div:first-child > div > strong,
  .btn-jump-beelio-card > div:first-child > div > strong {
    font-size: 14.5px !important;
    line-height: 1.25 !important;
    margin-bottom: 2px !important;
    word-break: normal !important;
    overflow-wrap: break-word !important;
  }

  #btn-jump-beelio-path > div:first-child > div > span,
  .btn-jump-beelio-card > div:first-child > div > span {
    display: -webkit-box !important;
    -webkit-line-clamp: 2 !important;
    -webkit-box-orient: vertical !important;
    overflow: hidden !important;
    font-size: 12px !important;
    line-height: 1.35 !important;
  }

  #btn-jump-beelio-path > button,
  .btn-jump-beelio-card > button {
    flex: 0 0 auto !important;
    padding: 8px 14px !important;
    font-size: 12.5px !important;
    border-radius: 11px !important;
    min-height: 36px !important;
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
  }

  /* Bộ lọc môn học: Cho phép hiển thị trọn vẹn menu chọn Lớp (#menu-dashboard-grade) không bị cắt overflow */
  .simple-filter-card {
    padding: 10px 12px;
    gap: 10px;
    flex-direction: column;
    align-items: stretch;
    width: 100% !important;
    max-width: 100% !important;
    min-width: 0 !important;
    overflow: visible !important;
    box-sizing: border-box !important;
  }

  .subject-pills-row {
    display: flex !important;
    overflow: visible !important;
    flex-wrap: wrap !important;
    white-space: normal !important;
    gap: 6px !important;
    padding-bottom: 2px !important;
    width: 100% !important;
    max-width: 100% !important;
    min-width: 0 !important;
    box-sizing: border-box !important;
  }

  .grade-context-menu {
    min-width: min(250px, calc(100vw - 44px)) !important;
    max-width: calc(100vw - 32px) !important;
    z-index: 450 !important;
  }

  .subj-tab-btn {
    flex-shrink: 0 !important;
    padding: 6px 11px;
    font-size: 12.5px;
    white-space: nowrap;
  }

  .simple-search-row {
    max-width: 100%;
    min-width: 100%;
  }

  /* Bộ lọc trạng thái đề thi: 1 hàng ngang duy nhất vuốt mượt mà trên di động */
  .catalog-status-filter-row {
    display: flex !important;
    overflow-x: auto !important;
    flex-wrap: nowrap !important;
    white-space: nowrap !important;
    -webkit-overflow-scrolling: touch !important;
    scrollbar-width: none !important;
    -ms-overflow-style: none !important;
    gap: 6px !important;
    margin-top: 8px !important;
    padding-top: 8px !important;
    padding-bottom: 2px !important;
  }

  .catalog-status-filter-row::-webkit-scrollbar {
    display: none !important;
    width: 0 !important;
    height: 0 !important;
  }

  .status-pill-btn {
    flex-shrink: 0 !important;
    padding: 4px 10px !important;
    font-size: 12px !important;
  }

  /* Grid đề thi 1 cột trên điện thoại */
  .exams-grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  /* HIỂN THỊ THANH MOBILE BOTTOM NAV */
  .mobile-bottom-nav {
    display: flex;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: calc(58px + env(safe-area-inset-bottom, 0px));
    padding-bottom: env(safe-area-inset-bottom, 0px);
    background: #FFFFFF;
    border-top: 1px solid #E2E8F0;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.06);
    z-index: 999;
    align-items: center;
    justify-content: space-around;
  }

  .mobile-nav-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    padding: 6px 0;
    color: #64748B;
    font-family: var(--font-main);
    font-size: 11px;
    font-weight: 600;
    cursor: pointer;
    position: relative;
    transition: color 0.15s ease;
    -webkit-tap-highlight-color: transparent;
  }

  .mobile-nav-item .icon {
    font-size: 22px;
    margin-bottom: 2px;
    transition: transform 0.15s ease;
  }

  .mobile-nav-item.active {
    color: #2563EB;
    font-weight: 700;
  }

  .mobile-nav-item.active .icon {
    transform: scale(1.12);
  }

  .mobile-nav-highlight {
    position: relative;
    top: -6px;
  }

  .mobile-nav-highlight .quick-icon-circle {
    width: 42px;
    height: 42px;
    background: linear-gradient(135deg, #F59E0B 0%, #EA580C 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #FFFFFF;
    box-shadow: 0 4px 10px rgba(234, 88, 12, 0.35);
    margin-bottom: 2px;
  }

  .mobile-nav-highlight .quick-icon-circle .icon {
    font-size: 22px;
    margin-bottom: 0;
  }

  .mobile-nav-highlight.active .nav-label {
    color: #EA580C;
    font-weight: 700;
  }

  .mobile-nav-counter {
    position: absolute;
    top: 3px;
    right: calc(50% - 16px);
    background: #DC2626;
    color: #FFFFFF;
    font-size: 10px;
    font-weight: 700;
    min-width: 16px;
    height: 16px;
    border-radius: 8px;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 0 4px;
  }

  /* Chống zoom tự động trên Safari iOS khi focus vào ô input */
  input, select, textarea {
    font-size: 16px !important;
  }
}

@media (max-width: 480px) {
  .exam-card-actions {
    flex-direction: column;
  }

  .btn-card-action {
    width: 100%;
    justify-content: center;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
}

@media (max-width: 420px) {
  .main-site-header .container-inner {
    padding: 0 8px !important;
  }

  .header-layout {
    gap: 4px;
    height: 50px;
  }

  .header-left-zone {
    gap: 4px;
  }

  .brand-block {
    gap: 4px;
  }

  .brand-crest {
    width: 30px;
    height: 30px;
    min-width: 30px;
    border-radius: 6px;
  }

  .brand-crest .icon {
    font-size: 16px;
  }

  .brand-titles .brand-name {
    font-size: 11.5px;
    letter-spacing: -0.3px;
  }

  .seg-btn {
    padding: 3px 6px;
    font-size: 11px;
  }

  .header-utilities {
    gap: 4px;
  }

  .gio-hoa-badge {
    font-size: 11px;
    padding: 3px 5px;
  }

  .pomo-trigger {
    font-size: 11px;
    padding: 3px 5px;
  }

  .simple-filter-card {
    padding: 8px 10px;
    border-radius: 12px;
  }

  .subj-tab-btn {
    padding: 5px 9px;
    font-size: 12px;
  }
}

/* Điện thoại màn hình dọc (<= 560px): Xếp gọn Banner xanh 2 tầng thanh thoát (~104px thay vì 666px) */
@media (max-width: 560px) {
  #btn-jump-beelio-path,
  .btn-jump-beelio-card {
    flex-direction: column !important;
    align-items: stretch !important;
    gap: 9px !important;
    padding: 11px 13px !important;
  }

  #btn-jump-beelio-path > div:first-child,
  .btn-jump-beelio-card > div:first-child {
    width: 100% !important;
    flex: 0 0 auto !important;
  }

  #btn-jump-beelio-path > button,
  .btn-jump-beelio-card > button {
    width: 100% !important;
    padding: 7px 14px !important;
    font-size: 13px !important;
    min-height: 36px !important;
  }
}

/* Chế độ Tập trung Phòng Thi trên điện thoại & tablet nhỏ (<= 768px):
   Ẩn Header tổng và Mobile Bottom Nav khi bé đang làm bài thi để mở rộng +106px vùng đọc đề & chống chạm nhầm */
@media (max-width: 768px) {
  body:has(.exam-room-wrapper) {
    padding-bottom: 0 !important;
  }

  #app:has(.exam-room-wrapper) > .main-site-header,
  #app:has(.exam-room-wrapper) > .mobile-bottom-nav {
    display: none !important;
  }

  #app:has(.exam-room-wrapper) > .main-content-view {
    height: 100vh !important;
    height: 100dvh !important;
    max-height: 100dvh !important;
    padding-bottom: 0 !important;
  }
}

/* ==========================================================================
   NATIVE MOBILE APP SHELL (TRÀN VIỀN 100VW x 100DVH, TƯƠNG THÍCH BÀN PHÍM ẢO iOS/ANDROID)
   ========================================================================== */
@media (max-width: 640px) {
  html, body {
    height: 100% !important;
    height: 100dvh !important;
    min-height: 0 !important;
    max-height: 100dvh !important;
    width: 100% !important;
    margin: 0 !important;
    padding: 0 !important;
    overflow: hidden !important;
    overscroll-behavior: none;
    position: static !important;
    -webkit-overflow-scrolling: touch;
  }

  #app {
    display: flex !important;
    flex-direction: column !important;
    height: 100vh !important;
    height: 100dvh !important;
    min-height: 0 !important;
    max-height: 100dvh !important;
    width: 100% !important;
    max-width: 100vw !important;
    overflow: hidden !important;
    position: relative !important;
    inset: auto !important;
  }

  .main-site-header {
    flex: 0 0 48px;
    height: 48px;
    padding: 0 10px;
    border-bottom: 1px solid rgba(226, 232, 240, 0.8);
    background: #FFFFFF;
    z-index: 300;
  }

  /* Mặc định MỌI view đều co giãn flex 1 và cuộn dọc mượt mà (không phụ thuộc whitelist :has dễ vỡ) */
  .main-content-view {
    flex: 1 1 0% !important;
    min-height: 0 !important;
    height: auto !important;
    max-height: none !important;
    width: 100% !important;
    overflow-y: auto !important;
    overflow-x: hidden !important;
    -webkit-overflow-scrolling: touch;
    overscroll-behavior-y: contain;
    position: relative;
    margin: 0;
    padding: 0 0 18px 0;
  }

  /* Chỉ khóa cuộn dọc đối với bản đồ tĩnh legacy chưa nâng cấp V3 */
  .main-content-view:has(.mockup-adventure-canvas-wrapper:not([data-beelio-v3-ready="1"])),
  .main-content-view:has(.g4-adventure-page:not([data-beelio-v3-ready="1"])) {
    overflow: hidden !important;
    padding-bottom: 0 !important;
  }

  .mobile-bottom-nav {
    display: flex !important;
    flex: 0 0 calc(58px + env(safe-area-inset-bottom, 0px)) !important;
    height: calc(58px + env(safe-area-inset-bottom, 0px)) !important;
    padding-bottom: env(safe-area-inset-bottom, 0px) !important;
    position: relative !important;
    bottom: auto !important;
    left: auto !important;
    right: auto !important;
    width: 100% !important;
    z-index: 300 !important;
  }
}

/* Bảo vệ chế độ In đề / PDF trên mọi kích thước màn hình (gỡ khóa 100dvh & ẩn thanh điều hướng) */
@media print {
  html, body, #app, .main-content-view {
    position: static !important;
    height: auto !important;
    min-height: 0 !important;
    max-height: none !important;
    width: 100% !important;
    overflow: visible !important;
    padding: 0 !important;
    margin: 0 !important;
  }

  .main-site-header,
  .mobile-bottom-nav,
  .pomo-popover,
  #kid-mascot-widget {
    display: none !important;
  }
}