/* style-final-fix.css
   Final UI override for Quiz App. Put this file after style.css.
   It fixes: light pastel background, separated subject cards, real sidebar collapse. */

:root {
  --app-bg: #f8fafc;
  --app-bg-2: #eef2ff;
  --app-bg-3: #fdf2f8;
  --app-surface: rgba(255, 255, 255, 0.92);
  --app-surface-strong: rgba(255, 255, 255, 0.98);
  --app-text: #1e293b;
  --app-muted: #64748b;
  --app-primary: #8b5cf6;
  --app-primary-2: #6d28d9;
  --app-primary-soft: #ede9fe;
  --app-border: rgba(148, 163, 184, 0.28);
  --app-shadow: 0 18px 45px rgba(15, 23, 42, 0.10);
  --app-shadow-soft: 0 8px 24px rgba(15, 23, 42, 0.08);
  --app-radius-lg: 26px;
  --app-radius-md: 18px;
  --app-radius-sm: 12px;
}

* { box-sizing: border-box; }

html,
body {
  min-height: 100%;
  margin: 0;
  color: var(--app-text) !important;
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif !important;
  background:
    radial-gradient(circle at 12% 8%, rgba(186, 230, 253, 0.55), transparent 32rem),
    radial-gradient(circle at 90% 4%, rgba(221, 214, 254, 0.55), transparent 30rem),
    radial-gradient(circle at 85% 92%, rgba(251, 207, 232, 0.45), transparent 30rem),
    linear-gradient(135deg, #f8fafc 0%, #eef2ff 54%, #fdf2f8 100%) !important;
  overflow-x: hidden;
}

[hidden] { display: none !important; }

/* Remove duplicated top logo/header if an older index still has it */
.app-header,
.top-brand,
.header-brand,
.brand-header {
  display: none !important;
}

.app-shell {
  width: 100%;
  min-height: 100vh;
  padding: clamp(14px, 2.5vw, 28px) !important;
  background: transparent !important;
}

.app-frame {
  width: min(1440px, 100%) !important;
  margin: 0 auto !important;
  display: grid !important;
  grid-template-columns: minmax(0, 1fr) !important;
  gap: 22px !important;
  align-items: start !important;
  background: transparent !important;
}

/* Desktop layout only when sidebar is visible */
@media (min-width: 769px) {
  .app-frame:has(#sidebar:not([hidden])) {
    grid-template-columns: 260px minmax(0, 1fr) !important;
  }

  .app-frame:has(#sidebar.is-collapsed:not([hidden])) {
    grid-template-columns: 86px minmax(0, 1fr) !important;
  }
}

.app-content,
.main-grid,
#dashboardSection,
#homeView,
#quizSection {
  min-width: 0 !important;
  background: transparent !important;
}

.main-grid {
  display: grid !important;
  gap: 22px !important;
}

/* Card/panel colors */
.panel,
.hero-card,
.history-card,
.leaderboard-card,
.about-card,
.app-footer,
#homeView > section,
#homeView > div,
.home-card,
.dashboard-card,
.subject-section,
.developer-card,
.review-card {
  color: var(--app-text) !important;
  background: var(--app-surface) !important;
  border: 1px solid var(--app-border) !important;
  border-radius: var(--app-radius-lg) !important;
  box-shadow: var(--app-shadow) !important;
  backdrop-filter: blur(16px) !important;
  -webkit-backdrop-filter: blur(16px) !important;
}

.panel,
.hero-card,
.history-card,
.leaderboard-card,
.about-card,
#homeView > section,
#homeView > div {
  padding: clamp(18px, 3vw, 34px) !important;
}

/* Login card */
body.is-guest .app-shell {
  display: flex !important;
  align-items: center !important;
  justify-content: center !important;
}

body.is-guest .app-frame {
  margin: auto !important;
}

.auth-panel {
  width: min(760px, 100%) !important;
  margin: 0 auto !important;
  display: grid !important;
  gap: 18px !important;
}

.intro-card { padding: 0 !important; }

.eyebrow {
  color: var(--app-primary-2) !important;
  margin: 0 0 8px !important;
  font-size: 1.78rem !important;
  font-weight: 900 !important;
  letter-spacing: 0.11em !important;
  text-transform: uppercase !important;
}

h1, h2, h3, h4, p, li, label, span, strong, summary, td, th {
  color: inherit;
}

h2, h3 {
  color: var(--app-text) !important;
  letter-spacing: -0.035em !important;
  margin-top: 0 !important;
}

.muted-text,
.status-text,
#quizStatus {
  color: var(--app-muted) !important;
}

/* Forms */
.auth-form:not([hidden]),
.feedback-form:not([hidden]) {
  display: grid !important;
  grid-template-columns: 132px minmax(0, 1fr) !important;
  gap: 14px !important;
  align-items: center !important;
}

label {
  font-weight: 700 !important;
  color: #334155 !important;
}

input,
textarea,
select {
  width: 100% !important;
  min-height: 46px !important;
  padding: 11px 13px !important;
  border: 1px solid rgba(148, 163, 184, 0.36) !important;
  border-radius: 14px !important;
  background: rgba(255, 255, 255, 0.94) !important;
  color: var(--app-text) !important;
  outline: none !important;
  box-shadow: none !important;
}

textarea { min-height: 120px !important; resize: vertical; }

input:focus,
textarea:focus,
select:focus {
  border-color: rgba(139, 92, 246, 0.72) !important;
  box-shadow: 0 0 0 4px rgba(139, 92, 246, 0.14) !important;
}

/* Buttons: global spacing and style */
button,
.primary-btn,
.ghost-btn,
.mode-chip,
.sidebar-item {
  appearance: none !important;
  -webkit-appearance: none !important;
  min-height: 44px !important;
  padding: 11px 16px !important;
  border-radius: 14px !important;
  border: 1px solid rgba(148, 163, 184, 0.34) !important;
  font-family: inherit !important;
  font-weight: 800 !important;
  cursor: pointer !important;
  transition: transform 0.16s ease, box-shadow 0.16s ease, background 0.16s ease, border-color 0.16s ease !important;
}

button:hover,
.primary-btn:hover,
.ghost-btn:hover,
.mode-chip:hover,
.sidebar-item:hover {
  transform: translateY(-1px) !important;
  box-shadow: var(--app-shadow-soft) !important;
}

.primary-btn,
.mode-chip.active,
button[data-active="true"] {
  background: linear-gradient(135deg, #8b5cf6, #6366f1) !important;
  border-color: rgba(139, 92, 246, 0.45) !important;
  color: #ffffff !important;
}

.ghost-btn,
.mode-chip,
button:not(.primary-btn):not(.sidebar-item):not(.subject-card-final) {
  background: rgba(255, 255, 255, 0.92) !important;
  color: #334155 !important;
}

.auth-mode-switch,
.inline-actions,
.account-actions,
.dashboard-actions,
.quiz-header-actions,
.quiz-actions,
.feedback-form {
  display: flex !important;
  flex-wrap: wrap !important;
  align-items: center !important;
  gap: 12px !important;
}

/* Sidebar */
.sidebar {
  width: 260px !important;
  max-width: 260px !important;
  padding: 14px !important;
  position: sticky !important;
  top: 18px !important;
  align-self: start !important;
  overflow: hidden !important;
  color: var(--app-text) !important;
  background: rgba(255, 255, 255, 0.82) !important;
  border: 1px solid var(--app-border) !important;
  border-radius: var(--app-radius-lg) !important;
  box-shadow: var(--app-shadow) !important;
  backdrop-filter: blur(16px) !important;
  -webkit-backdrop-filter: blur(16px) !important;
  transition: width 0.22s ease, max-width 0.22s ease !important;
}

.sidebar.is-collapsed {
  width: 86px !important;
  max-width: 86px !important;
}

.sidebar-nav,
.sidebar-footer {
  display: grid !important;
  gap: 10px !important;
}

.sidebar-item {
  width: 100% !important;
  display: flex !important;
  align-items: center !important;
  justify-content: flex-start !important;
  gap: 12px !important;
  min-width: 0 !important;
  color: #334155 !important;
  background: rgba(255, 255, 255, 0.82) !important;
  border: 1px solid rgba(148, 163, 184, 0.28) !important;
  box-shadow: none !important;
}

.sidebar-icon {
  width: 24px !important;
  min-width: 24px !important;
  display: inline-grid !important;
  place-items: center !important;
  color: #7c3aed !important;
}

.sidebar-label {
  min-width: 0 !important;
  overflow: hidden !important;
  text-overflow: ellipsis !important;
  white-space: nowrap !important;
}

.sidebar.is-collapsed .sidebar-label,
.sidebar.is-collapsed .sidebar-caret {
  display: none !important;
}

.sidebar.is-collapsed .sidebar-item {
  justify-content: center !important;
  padding-left: 0 !important;
  padding-right: 0 !important;
}

.sidebar.is-collapsed .sidebar-icon {
  margin: 0 !important;
}

/* Subject cards created by ui-final-fix.js */
.subject-grid-final {
  display: grid !important;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)) !important;
  gap: 14px !important;
  margin: 18px 0 22px !important;
  align-items: stretch !important;
  width: 100% !important;
}

.subject-card-final {
  width: 100% !important;
  min-height: 92px !important;
  margin: 0 !important;
  display: flex !important;
  flex-direction: column !important;
  align-items: flex-start !important;
  justify-content: center !important;
  gap: 7px !important;
  padding: 16px 18px !important;
  border-radius: 18px !important;
  border: 1px solid rgba(148, 163, 184, 0.34) !important;
  background: rgba(255, 255, 255, 0.94) !important;
  color: var(--app-text) !important;
  box-shadow: 0 10px 28px rgba(15, 23, 42, 0.08) !important;
  text-align: left !important;
  white-space: normal !important;
  line-height: 1.15 !important;
}

.subject-card-final:hover {
  border-color: rgba(139, 92, 246, 0.55) !important;
  background: #faf5ff !important;
}

.subject-card-final.is-selected,
.subject-card-final.active,
.subject-card-final[aria-pressed="true"] {
  border-color: #8b5cf6 !important;
  background: #ede9fe !important;
  box-shadow: 0 12px 32px rgba(139, 92, 246, 0.16) !important;
}

.subject-name-final {
  display: block !important;
  font-size: 1rem !important;
  font-weight: 900 !important;
  color: #1e293b !important;
}

.subject-slug-final {
  display: block !important;
  font-size: 0.78rem !important;
  font-weight: 700 !important;
  color: #64748b !important;
  letter-spacing: 0.01em !important;
}

/* Space other action buttons in home view */
#homeView button:not(.subject-card-final) {
  margin: 6px 8px 6px 0 !important;
}

#homeView select {
  margin: 8px 0 12px !important;
}

#homeView label,
#homeView .muted-text,
#homeView p {
  color: var(--app-muted) !important;
}

#homeView h2,
#homeView h3 {
  color: var(--app-text) !important;
}

/* Tables */
.table-wrap {
  overflow-x: auto !important;
}

table {
  width: 100% !important;
  border-collapse: collapse !important;
  color: var(--app-text) !important;
}

th, td {
  padding: 12px !important;
  border-bottom: 1px solid rgba(148, 163, 184, 0.22) !important;
}

th {
  color: #475569 !important;
  background: rgba(248, 250, 252, 0.88) !important;
}

/* Mobile */
@media (max-width: 768px) {
  .app-shell { padding: 12px !important; }

  .app-frame {
    grid-template-columns: 1fr !important;
    gap: 14px !important;
  }

  .sidebar {
    position: static !important;
    width: 100% !important;
    max-width: none !important;
    display: grid !important;
    gap: 10px !important;
  }

  .sidebar.is-collapsed {
    width: 100% !important;
    max-width: none !important;
  }

  .sidebar.is-collapsed .sidebar-label {
    display: inline !important;
  }

  .sidebar-nav,
  .sidebar-footer {
    grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
  }

  .subject-grid-final {
    grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
    gap: 10px !important;
  }

  .subject-card-final {
    min-height: 84px !important;
    padding: 13px !important;
  }

  .auth-form,
  .feedback-form {
    grid-template-columns: 1fr !important;
  }

  .feedback-form .muted-text {
    grid-column: auto !important;
  }
}

@media (max-width: 430px) {
  .subject-grid-final,
  .sidebar-nav,
  .sidebar-footer {
    grid-template-columns: 1fr !important;
  }
}
/* Sửa card chọn môn: bỏ slug, căn giữa toàn bộ */
.subject-grid-final {
  display: grid !important;
  grid-template-columns: repeat(auto-fit, minmax(220px, 220px)) !important;
  justify-content: center !important;
  justify-items: center !important;
  gap: 20px !important;
  width: 100% !important;
}

.subject-card-final {
  width: 220px !important;
  min-height: 120px !important;
  display: flex !important;
  align-items: center !important;
  justify-content: center !important;
  text-align: center !important;
  flex-direction: column !important;
  padding: 20px !important;
}

.subject-name-final {
  display: block !important;
  width: 100% !important;
  text-align: center !important;
  font-size: 22px !important;
  font-weight: 800 !important;
  line-height: 1.25 !important;
}

.subject-slug-final {
  display: none !important;
}/* Góp ý: căn giữa toàn bộ, kéo ngang ô nhập */
#feedbackSection {
  width: 100% !important;
  max-width: 1000px !important;
  margin-left: auto !important;
  margin-right: auto !important;
  text-align: center !important;
}

#feedbackSection .feedback-form {
  width: 100% !important;
  max-width: 860px !important;
  margin: 0 auto !important;

  display: flex !important;
  flex-direction: column !important;
  align-items: center !important;
  justify-content: center !important;
  gap: 22px !important;

  grid-template-columns: 1fr !important;
}

#feedbackSection .feedback-form label[for="feedbackInput"] {
  display: none !important;
}

#feedbackSection .feedback-form .muted-text {
  display: none !important;
}

#feedbackSection #feedbackInput {
  width: 100% !important;
  max-width: 860px !important;
  min-height: 170px !important;
  display: block !important;
  margin: 0 auto !important;
  box-sizing: border-box !important;
}

#feedbackSection #sendFeedbackBtn {
  display: block !important;
  margin: 0 auto !important;
  min-width: 190px !important;
  align-self: center !important;
}
/* Mobile: thu nhỏ ô môn học */
@media (max-width: 768px) {
  .subject-grid-final {
    display: grid !important;
    grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
    gap: 12px !important;
    justify-content: center !important;
    width: 100% !important;
  }

  .subject-card-final {
    width: 100% !important;
    min-height: 74px !important;
    padding: 12px 10px !important;
    border-radius: 16px !important;

    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    text-align: center !important;
  }

  .subject-name-final {
    font-size: 17px !important;
    font-weight: 800 !important;
    line-height: 1.2 !important;
    text-align: center !important;
  }

  .subject-slug-final {
    display: none !important;
  }
}
/* MOBILE MENU - GỘP THÀNH 1 CARD */
@media (max-width: 768px) {
  #mobileMenu {
    width: 100% !important;
    max-width: 100% !important;
    margin: 0 0 14px 0 !important;
    padding: 12px !important;
    border-radius: 24px !important;
    border: 1px solid rgba(148, 163, 184, 0.18) !important;
    background: rgba(15, 23, 42, 0.72) !important;
    box-shadow: 0 18px 45px rgba(0, 0, 0, 0.28) !important;
    box-sizing: border-box !important;
  }

  #mobileMenuToggle {
    width: 100% !important;
    min-height: 58px !important;
    margin: 0 !important;
    border-radius: 18px !important;
    display: flex !important;
    align-items: center !important;
    justify-content: space-between !important;
    background: rgba(15, 23, 42, 0.45) !important;
    border: 1px solid rgba(148, 163, 184, 0.16) !important;
  }

  #mobileMenuPanel {
    display: none !important;
    width: 100% !important;
    margin: 12px 0 0 0 !important;
    padding: 0 !important;
    border: none !important;
    border-radius: 0 !important;
    background: transparent !important;
    box-shadow: none !important;
  }

  #mobileMenu.open #mobileMenuPanel {
    display: grid !important;
    grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
    gap: 10px !important;
  }

  #mobileMenuPanel .sidebar-item {
    width: 100% !important;
    min-height: 62px !important;
    margin: 0 !important;
    padding: 12px 14px !important;
    border-radius: 16px !important;
    justify-content: flex-start !important;
    box-sizing: border-box !important;
  }

  #mobileMenuPanel .sidebar-footer {
    display: contents !important;
  }

  #mobileMenuPanel .sidebar-toggle,
  #mobileMenuPanel #sidebarToggle {
    display: none !important;
  }
}
/* MOBILE MENU - CHỈ GIỮ 1 CARD */
@media (max-width: 768px) {
  #mobileMenu {
    width: 100% !important;
    max-width: 100% !important;
    margin: 0 0 14px 0 !important;
    padding: 12px !important;
    border-radius: 24px !important;
    border: 1px solid rgba(148, 163, 184, 0.18) !important;
    background: rgba(15, 23, 42, 0.72) !important;
    box-shadow: 0 18px 45px rgba(0, 0, 0, 0.28) !important;
    box-sizing: border-box !important;
  }

  #mobileMenuToggle {
    width: 100% !important;
    min-height: 56px !important;
    margin: 0 !important;
    border-radius: 18px !important;
  }

  #mobileMenuPanel {
    display: none !important;
    width: 100% !important;
    margin: 12px 0 0 0 !important;
    padding: 0 !important;
    border: 0 !important;
    border-radius: 0 !important;
    background: transparent !important;
    box-shadow: none !important;
  }

  #mobileMenu.open #mobileMenuPanel {
    display: grid !important;
    grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
    gap: 10px !important;
  }

  #mobileMenuPanel .sidebar-item {
    min-height: 54px !important;
    margin: 0 !important;
    padding: 10px 12px !important;
    border-radius: 14px !important;
    background: rgba(15, 23, 42, 0.42) !important;
  }

  #mobileMenuPanel .sidebar-footer {
    display: contents !important;
    margin: 0 !important;
    padding: 0 !important;
    border: 0 !important;
  }

  /* Nếu dòng Mở rộng menu vẫn còn là item đầu tiên thì ẩn luôn */
  #mobileMenuPanel > .sidebar-item:first-child.sidebar-toggle {
    display: none !important;
  }
}
/* FIX DỨT ĐIỂM: mobile chỉ dùng #mobileMenu, ẩn sidebar desktop */
@media (max-width: 768px) {
  aside#sidebar,
  #sidebar,
  .app-frame > #sidebar {
    display: none !important;
    visibility: hidden !important;
    opacity: 0 !important;
    width: 0 !important;
    max-width: 0 !important;
    height: 0 !important;
    max-height: 0 !important;
    padding: 0 !important;
    margin: 0 !important;
    border: 0 !important;
    overflow: hidden !important;
    position: absolute !important;
    left: -9999px !important;
  }

  #mobileMenu {
    display: block !important;
    visibility: visible !important;
    opacity: 1 !important;
    width: 100% !important;
    max-width: 100% !important;
    margin: 0 0 14px 0 !important;
    padding: 12px !important;
    border-radius: 24px !important;
    border: 1px solid rgba(148, 163, 184, 0.18) !important;
    background: rgba(15, 23, 42, 0.72) !important;
    box-shadow: 0 18px 45px rgba(0, 0, 0, 0.28) !important;
    box-sizing: border-box !important;
  }

  #mobileMenuToggle {
    width: 100% !important;
    min-height: 56px !important;
    margin: 0 !important;
    border-radius: 18px !important;
    display: flex !important;
    align-items: center !important;
    justify-content: space-between !important;
  }

  #mobileMenuPanel {
    display: none !important;
    width: 100% !important;
    margin: 12px 0 0 0 !important;
    padding: 0 !important;
    border: 0 !important;
    border-radius: 0 !important;
    background: transparent !important;
    box-shadow: none !important;
  }

  #mobileMenu.open #mobileMenuPanel {
    display: grid !important;
    grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
    gap: 10px !important;
  }

  #mobileMenuPanel .sidebar-item {
    width: 100% !important;
    min-height: 54px !important;
    margin: 0 !important;
    padding: 10px 12px !important;
    border-radius: 14px !important;
    background: rgba(15, 23, 42, 0.42) !important;
    box-sizing: border-box !important;
  }

  #mobileMenuPanel .sidebar-footer {
    display: contents !important;
    margin: 0 !important;
    padding: 0 !important;
    border: 0 !important;
  }
}
/* FIX LOGO TOP - không chiếm cột lớn */
.app-brand-top {
  grid-column: 1 / -1 !important;
  width: fit-content !important;
  max-width: 100% !important;
  height: auto !important;
  min-height: 0 !important;

  margin: 0 auto 14px auto !important;
  padding: 8px 14px !important;

  display: flex !important;
  flex-direction: row !important;
  align-items: center !important;
  justify-content: center !important;
  gap: 10px !important;

  border-radius: 18px !important;
  border: 1px solid rgba(148, 163, 184, 0.16) !important;
  background: rgba(15, 23, 42, 0.35) !important;
  box-shadow: none !important;
  backdrop-filter: blur(10px) !important;
  position: relative !important;
}

.app-brand-logo {
  width: 42px !important;
  height: 42px !important;
  object-fit: contain !important;
  display: block !important;
}

.app-brand-name {
  width: 150px !important;
  height: auto !important;
  object-fit: contain !important;
  display: block !important;
}

/* Ép app-content không chia logo thành cột riêng */
.app-content {
  display: block !important;
}

@media (max-width: 768px) {
  .app-brand-top {
    margin-bottom: 12px !important;
    padding: 7px 10px !important;
    gap: 8px !important;
    border-radius: 16px !important;
  }

  .app-brand-logo {
    width: 34px !important;
    height: 34px !important;
  }

  .app-brand-name {
    width: 120px !important;
  }
}
/* Logo top: nhỏ gọn, không phá layout */
.app-brand-top {
  width: fit-content !important;
  max-width: 100% !important;
  margin: 0 auto 18px auto !important;
  padding: 8px 14px !important;

  display: flex !important;
  align-items: center !important;
  justify-content: center !important;
  gap: 10px !important;

  border-radius: 18px !important;
  border: 1px solid rgba(148, 163, 184, 0.16) !important;
  background: rgba(15, 23, 42, 0.35) !important;
  box-shadow: none !important;
}

.app-brand-logo {
  width: 44px !important;
  height: 44px !important;
  object-fit: contain !important;
  display: block !important;
}

.app-brand-name {
  width: 150px !important;
  height: auto !important;
  object-fit: contain !important;
  display: block !important;
}

@media (max-width: 768px) {
  .app-brand-top {
    margin-bottom: 12px !important;
    padding: 7px 10px !important;
    gap: 8px !important;
  }

  .app-brand-logo {
    width: 34px !important;
    height: 34px !important;
  }

  .app-brand-name {
    width: 120px !important;
  }
}
/* Logo thành card riêng trên đầu, kéo ngang toàn layout */
.app-brand-full {
  width: min(1440px, 100%) !important;
  max-width: 100% !important;
  margin: 0 auto 18px auto !important;
  padding: 16px 24px !important;

  display: flex !important;
  align-items: center !important;
  justify-content: center !important;
  gap: 18px !important;

  border-radius: 28px !important;
  border: 1px solid rgba(148, 163, 184, 0.18) !important;
  background: rgba(15, 23, 42, 0.62) !important;
  box-shadow: 0 18px 45px rgba(0, 0, 0, 0.26) !important;
  backdrop-filter: blur(16px) !important;
  -webkit-backdrop-filter: blur(16px) !important;
}

.app-brand-full .app-brand-logo {
  width: 64px !important;
  height: 64px !important;
  object-fit: contain !important;
  display: block !important;
}

.app-brand-full .app-brand-name {
  width: 230px !important;
  height: auto !important;
  object-fit: contain !important;
  display: block !important;
}

/* Không cho logo còn nằm trong cột menu nữa */
.sidebar-column > .app-brand-top,
.sidebar-brand-outside {
  display: none !important;
}

/* Cột menu trở lại bình thường */
.sidebar-column {
  gap: 0 !important;
}

@media (max-width: 768px) {
  .app-brand-full {
    margin: 0 auto 12px auto !important;
    padding: 12px 14px !important;
    border-radius: 22px !important;
    gap: 10px !important;
  }

  .app-brand-full .app-brand-logo {
    width: 44px !important;
    height: 44px !important;
  }

  .app-brand-full .app-brand-name {
    width: 160px !important;
  }
}
/* FIX CUỐI: logo là card riêng trên đầu toàn trang */
.app-shell > .app-brand-full {
  width: min(1440px, 100%) !important;
  max-width: 100% !important;
  margin: 0 auto 18px auto !important;
  padding: 16px 24px !important;

  display: flex !important;
  align-items: center !important;
  justify-content: center !important;
  gap: 18px !important;

  border-radius: 28px !important;
  border: 1px solid rgba(148, 163, 184, 0.18) !important;
  background: rgba(15, 23, 42, 0.62) !important;
  box-shadow: 0 18px 45px rgba(0, 0, 0, 0.26) !important;
  backdrop-filter: blur(16px) !important;
  -webkit-backdrop-filter: blur(16px) !important;
}

.app-shell > .app-brand-full .app-brand-logo {
  width: 64px !important;
  height: 64px !important;
  object-fit: contain !important;
  display: block !important;
}

.app-shell > .app-brand-full .app-brand-name {
  width: 230px !important;
  height: auto !important;
  object-fit: contain !important;
  display: block !important;
}

/* Xóa ảnh hưởng mấy class logo cũ */
.sidebar-column > .app-brand-top,
.sidebar-column > .sidebar-brand-outside,
.app-content > .app-brand-top,
.app-content > .app-brand-full {
  display: none !important;
}

@media (max-width: 768px) {
  .app-shell > .app-brand-full {
    margin: 0 auto 12px auto !important;
    padding: 12px 14px !important;
    border-radius: 22px !important;
    gap: 10px !important;
  }

  .app-shell > .app-brand-full .app-brand-logo {
    width: 44px !important;
    height: 44px !important;
  }

  .app-shell > .app-brand-full .app-brand-name {
    width: 160px !important;
  }
}
/* FIX CUỐI: card logo gọn hơn, logo nằm bên trái */
.app-shell > .app-brand-full {
  width: min(1440px, 100%) !important;
  max-width: 100% !important;

  height: 120px !important;
  min-height: 120px !important;
  max-height: 120px !important;

  margin: 0 auto 18px auto !important;
  padding: 14px 34px !important;

  display: flex !important;
  flex-direction: row !important;
  align-items: center !important;
  justify-content: flex-start !important;
  gap: 18px !important;

  border-radius: 28px !important;
  border: 1px solid rgba(148, 163, 184, 0.18) !important;
  background: rgba(15, 23, 42, 0.62) !important;
  box-shadow: 0 18px 45px rgba(0, 0, 0, 0.22) !important;

  overflow: hidden !important;
}

.app-shell > .app-brand-full .app-brand-logo {
  width: 74px !important;
  height: 74px !important;
  min-width: 74px !important;
  object-fit: contain !important;
  display: block !important;
}

.app-shell > .app-brand-full .app-brand-name {
  width: 260px !important;
  max-width: 260px !important;
  height: auto !important;
  object-fit: contain !important;
  display: block !important;
}

/* Mobile: logo vẫn nằm bên trái, card thấp hơn */
@media (max-width: 768px) {
  .app-shell > .app-brand-full {
    height: 108px !important;
    min-height: 108px !important;
    max-height: 108px !important;

    margin: 0 auto 14px auto !important;
    padding: 12px 18px !important;

    justify-content: flex-start !important;
    gap: 12px !important;
    border-radius: 24px !important;
  }

  .app-shell > .app-brand-full .app-brand-logo {
    width: 58px !important;
    height: 58px !important;
    min-width: 58px !important;
  }

  .app-shell > .app-brand-full .app-brand-name {
    width: 200px !important;
    max-width: calc(100vw - 140px) !important;
  }
}


/* =========================================================
   FINAL AUTH FIX - Ẩn toàn bộ menu khi chưa đăng nhập
   ========================================================= */

body.is-guest .sidebar-column,
body.is-guest #sidebar,
body.is-guest #mobileMenu {
  display: none !important;
  visibility: hidden !important;
}

body:has(#authSection:not([hidden])) .sidebar-column,
body:has(#authSection:not([hidden])) #sidebar,
body:has(#authSection:not([hidden])) #mobileMenu {
  display: none !important;
  visibility: hidden !important;
}

body.is-guest .app-frame,
body:has(#authSection:not([hidden])) .app-frame {
  width: min(1000px, 100%) !important;
  grid-template-columns: minmax(0, 1fr) !important;
  margin: 0 auto !important;
}

body.is-guest .app-content,
body:has(#authSection:not([hidden])) .app-content {
  width: 100% !important;
  max-width: 100% !important;
  margin: 0 auto !important;
}

body.is-guest .auth-panel,
body:has(#authSection:not([hidden])) .auth-panel {
  width: min(900px, 100%) !important;
  margin: 0 auto !important;
}

body:not(.is-guest) .sidebar-column {
  visibility: visible !important;
}


/* =========================================================
   FINAL GUEST LOGO FIX - Giữ logo khi ẩn menu đăng nhập
   ========================================================= */

body.is-guest .app-shell > .app-brand-full,
body:has(#authSection:not([hidden])) .app-shell > .app-brand-full {
  display: flex !important;
  visibility: visible !important;
  opacity: 1 !important;
}
/* Đánh giá từ người học */
.review-section {
  width: 100% !important;
}

.review-section > h2 {
  margin-bottom: 18px !important;
}

.review-grid {
  width: 100% !important;
  display: grid !important;
  grid-template-columns: repeat(3, minmax(0, 1fr)) !important;
  gap: 16px !important;
}

.review-item {
  min-width: 0 !important;
  min-height: 150px !important;
  padding: 20px !important;

  display: flex !important;
  flex-direction: column !important;
  justify-content: space-between !important;
  gap: 18px !important;

  border: 1px solid rgba(148, 163, 184, 0.22) !important;
  border-radius: 18px !important;
  background: rgba(15, 23, 42, 0.35) !important;
  box-shadow: none !important;
}

.review-content {
  margin: 0 !important;
  font-size: 16px !important;
  line-height: 1.6 !important;
  font-weight: 600 !important;
}

.review-student {
  margin: 0 !important;
  padding-top: 12px !important;

  border-top: 1px solid rgba(148, 163, 184, 0.18) !important;

  color: var(--app-muted) !important;
  font-size: 14px !important;
  font-weight: 700 !important;
}

/* Máy tính bảng */
@media (max-width: 1000px) {
  .review-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
  }
}

/* Điện thoại */
@media (max-width: 768px) {
  .review-grid {
    grid-template-columns: 1fr !important;
    gap: 12px !important;
  }

  .review-item {
    min-height: 130px !important;
    padding: 16px !important;
  }

  .review-content {
    font-size: 15px !important;
  }

  .review-student {
    font-size: 13px !important;
  }
}
/* Căn đều nội dung thông báo từ nhà phát triển */
.announcement-card .muted-text {
  width: 100% !important;
  margin: 0 !important;
  text-align: justify !important;
  text-justify: inter-word !important;
  line-height: 1.65 !important;
  hyphens: auto !important;
}
/* Font tự nhiên, giống ứng dụng thật */
html,
body,
button,
input,
select,
textarea {
  font-family:
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    Roboto,
    "Helvetica Neue",
    Arial,
    sans-serif !important;
}

/* Tiêu đề không quá đậm */
h1,
h2,
h3,
h4,
.subject-name-final,
.mode-card strong {
  font-weight: 600 !important;
  letter-spacing: -0.015em !important;
}

/* Nội dung dễ đọc, tự nhiên */
p,
li,
label,
span,
input,
select,
textarea {
  font-weight: 400;
  letter-spacing: normal;
}

/* Nút bấm vừa phải */
button {
  font-weight: 600 !important;
  letter-spacing: normal !important;
}

/* Chữ nhỏ phía trên tiêu đề */
.eyebrow {
  font-weight: 600 !important;
  letter-spacing: 0.05em !important;
}
/* Tiêu đề Môn học giống tiêu đề Lịch sử của bạn */
#homeView .subject-page-title {
  margin: 0 0 12px !important;
  color: #8b5cf6 !important;
  font-size: 30px !important;
  line-height: 1.15 !important;
  font-weight: 600 !important;
  letter-spacing: 0.04em !important;
  text-transform: uppercase !important;
  text-align: left !important;
}

@media (max-width: 768px) {
  #homeView .subject-page-title {
    font-size: 30px !important;
  }
}

/* =========================================================
   1. BỎ CARD BAO QUANH LOGO VÀ TÊN APP
   ========================================================= */

.app-brand-full {
  width: min(1440px, 100%) !important;
  margin: 0 auto 18px !important;
  padding: 8px 12px !important;

  display: flex !important;
  align-items: center !important;
  justify-content: flex-start !important;
  gap: 20px !important;

  /* Bỏ hoàn toàn hình dạng card */
  background: transparent !important;
  border: none !important;
  border-radius: 0 !important;
  box-shadow: none !important;
  backdrop-filter: none !important;
  -webkit-backdrop-filter: none !important;
}

.app-brand-logo {
  width: 90px !important;
  height: 90px !important;
  object-fit: contain !important;
  flex-shrink: 0 !important;
}

.app-brand-name {
  width: auto !important;
  max-width: 310px !important;
  height: 90px !important;
  object-fit: contain !important;
  object-position: left center !important;
}


/* =========================================================
   2. LÀM CARD ĐÁNH GIÁ DỄ ĐỌC HƠN
   ========================================================= */

#homeView .review-section {
  background: rgba(255, 255, 255, 0.96) !important;
}

#homeView .review-grid {
  display: grid !important;
  grid-template-columns: repeat(3, minmax(0, 1fr)) !important;
  gap: 16px !important;
}

#homeView .review-item {
  min-width: 0 !important;
  min-height: 180px !important;
  padding: 22px !important;

  display: flex !important;
  flex-direction: column !important;
  justify-content: space-between !important;
  gap: 20px !important;

  /* Nền sáng, chữ tương phản rõ */
  background: rgba(255, 255, 255, 0.98) !important;
  color: #1e293b !important;

  border: 1px solid rgba(148, 163, 184, 0.32) !important;
  border-radius: 20px !important;
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.08) !important;

  opacity: 1 !important;
}

#homeView .review-content {
  margin: 0 !important;

  color: #1e293b !important;
  opacity: 1 !important;

  font-size: 17px !important;
  line-height: 1.65 !important;
  font-weight: 500 !important;
  letter-spacing: normal !important;
}

#homeView .review-student {
  margin: 0 !important;
  padding-top: 15px !important;

  color: #475569 !important;
  opacity: 1 !important;

  border-top: 1px solid rgba(148, 163, 184, 0.28) !important;

  font-size: 14px !important;
  line-height: 1.5 !important;
  font-weight: 600 !important;
  letter-spacing: normal !important;
}


/* =========================================================
   3. TỐI ƯU TRÊN ĐIỆN THOẠI
   ========================================================= */

@media (max-width: 768px) {
  .app-brand-full {
    margin-bottom: 10px !important;
    padding: 6px 8px !important;
    gap: 12px !important;
  }

  .app-brand-logo {
    width: 62px !important;
    height: 62px !important;
  }

  .app-brand-name {
    max-width: 220px !important;
    height: 62px !important;
  }

  #homeView .review-grid {
    grid-template-columns: 1fr !important;
    gap: 14px !important;
  }

  #homeView .review-item {
    min-height: 150px !important;
    padding: 18px !important;
    border-radius: 18px !important;
  }

  #homeView .review-content {
    font-size: 16px !important;
    line-height: 1.6 !important;
  }

  #homeView .review-student {
    font-size: 13px !important;
  }
}

@media (max-width: 430px) {
  .app-brand-full {
    justify-content: center !important;
  }

  .app-brand-logo {
    width: 56px !important;
    height: 56px !important;
  }

  .app-brand-name {
    max-width: 190px !important;
    height: 56px !important;
  }
}



/* Logo và tên ứng dụng luôn nằm ngang */
.app-shell > header.app-brand-plain {
  width: min(1440px, 100%) !important;
  min-height: 90px !important;
  height: auto !important;
  margin: 0 auto 18px !important;
  padding: 8px 20px !important;

  display: flex !important;
  flex-direction: row !important;
  flex-wrap: nowrap !important;
  align-items: center !important;
  justify-content: flex-start !important;
  gap: 22px !important;

  background: transparent !important;
  border: none !important;
  border-radius: 0 !important;
  box-shadow: none !important;
  backdrop-filter: none !important;
  -webkit-backdrop-filter: none !important;
}

.app-shell > header.app-brand-plain .app-brand-logo {
  display: block !important;
  width: 90px !important;
  min-width: 90px !important;
  max-width: 90px !important;
  height: 90px !important;

  flex: 0 0 90px !important;
  object-fit: contain !important;
  margin: 0 !important;
}

.app-shell > header.app-brand-plain .app-brand-name {
  display: block !important;
  width: 310px !important;
  min-width: 0 !important;
  max-width: 310px !important;
  height: 90px !important;

  flex: 0 1 310px !important;
  object-fit: contain !important;
  object-position: left center !important;
  margin: 0 !important;
}

/* Không cho phần tử giả tạo nền/card */
.app-shell > header.app-brand-plain::before,
.app-shell > header.app-brand-plain::after {
  display: none !important;
  content: none !important;
}

/* Điện thoại */
@media (max-width: 768px) {
  .app-shell > header.app-brand-plain {
    min-height: 62px !important;
    margin-bottom: 10px !important;
    padding: 4px 8px !important;
    gap: 12px !important;
    justify-content: flex-start !important;
  }

  .app-shell > header.app-brand-plain .app-brand-logo {
    width: 62px !important;
    min-width: 62px !important;
    max-width: 62px !important;
    height: 62px !important;
    flex-basis: 62px !important;
  }

  .app-shell > header.app-brand-plain .app-brand-name {
    width: 220px !important;
    max-width: calc(100vw - 110px) !important;
    height: 62px !important;
    flex-basis: 220px !important;
  }
}

@media (max-width: 430px) {
  .app-shell > header.app-brand-plain {
    justify-content: center !important;
  }

  .app-shell > header.app-brand-plain .app-brand-logo {
    width: 54px !important;
    min-width: 54px !important;
    max-width: 54px !important;
    height: 54px !important;
    flex-basis: 54px !important;
  }

  .app-shell > header.app-brand-plain .app-brand-name {
    width: 185px !important;
    max-width: calc(100vw - 95px) !important;
    height: 54px !important;
    flex-basis: 185px !important;
  }
}

/* =========================================================
   FINAL LOGO LAYOUT FIX
   Logo và tên app nằm ngang, không có card bao quanh.
   ========================================================= */
body .app-shell > header.app-brand-plain {
  box-sizing: border-box !important;
  width: min(1440px, 100%) !important;
  min-width: 0 !important;
  min-height: 0 !important;
  height: auto !important;

  margin: 0 auto 16px !important;
  padding: 4px 10px !important;

  display: flex !important;
  flex-direction: row !important;
  flex-wrap: nowrap !important;
  align-items: center !important;
  justify-content: flex-start !important;
  gap: 18px !important;

  background: transparent !important;
  background-color: transparent !important;
  background-image: none !important;
  border: 0 !important;
  border-radius: 0 !important;
  outline: 0 !important;
  box-shadow: none !important;
  filter: none !important;
  backdrop-filter: none !important;
  -webkit-backdrop-filter: none !important;
  overflow: visible !important;
}

body .app-shell > header.app-brand-plain::before,
body .app-shell > header.app-brand-plain::after {
  display: none !important;
  content: none !important;
}

body .app-shell > header.app-brand-plain > img {
  position: static !important;
  inset: auto !important;
  float: none !important;
  margin: 0 !important;
  padding: 0 !important;
  transform: none !important;
}

body .app-shell > header.app-brand-plain > .app-brand-logo {
  display: block !important;
  flex: 0 0 82px !important;

  width: 82px !important;
  min-width: 82px !important;
  max-width: 82px !important;
  height: 82px !important;

  object-fit: contain !important;
}

body .app-shell > header.app-brand-plain > .app-brand-name {
  display: block !important;
  flex: 0 1 280px !important;

  width: 280px !important;
  min-width: 0 !important;
  max-width: min(280px, calc(100% - 100px)) !important;
  height: 82px !important;

  object-fit: contain !important;
  object-position: left center !important;
}

/* Khi chưa đăng nhập vẫn giữ logo đúng bố cục */
body.is-guest .app-shell,
body:has(#authSection:not([hidden])) .app-shell {
  flex-direction: column !important;
}

body.is-guest .app-shell > header.app-brand-plain,
body:has(#authSection:not([hidden])) .app-shell > header.app-brand-plain {
  display: flex !important;
  visibility: visible !important;
  opacity: 1 !important;
}

@media (max-width: 768px) {
  body .app-shell > header.app-brand-plain {
    margin-bottom: 10px !important;
    padding: 2px 4px !important;
    gap: 10px !important;
  }

  body .app-shell > header.app-brand-plain > .app-brand-logo {
    flex-basis: 56px !important;
    width: 56px !important;
    min-width: 56px !important;
    max-width: 56px !important;
    height: 56px !important;
  }

  body .app-shell > header.app-brand-plain > .app-brand-name {
    flex-basis: 190px !important;
    width: 190px !important;
    max-width: calc(100% - 70px) !important;
    height: 56px !important;
  }
}

@media (max-width: 430px) {
  body .app-shell > header.app-brand-plain {
    justify-content: flex-start !important;
    gap: 8px !important;
  }

  body .app-shell > header.app-brand-plain > .app-brand-logo {
    flex-basis: 50px !important;
    width: 50px !important;
    min-width: 50px !important;
    max-width: 50px !important;
    height: 50px !important;
  }

  body .app-shell > header.app-brand-plain > .app-brand-name {
    flex-basis: 170px !important;
    width: 170px !important;
    max-width: calc(100% - 62px) !important;
    height: 50px !important;
  }
}

/* =========================================================
   FINAL MOBILE MENU FIX
   Bỏ card lớn bao quanh toàn bộ menu, chỉ giữ từng nút riêng.
   ========================================================= */
@media (max-width: 768px) {
  body #mobileMenu {
    width: 100% !important;
    max-width: 100% !important;
    margin: 0 0 14px !important;
    padding: 0 !important;

    display: block !important;
    visibility: visible !important;
    opacity: 1 !important;

    background: transparent !important;
    background-color: transparent !important;
    background-image: none !important;

    border: 0 !important;
    border-radius: 0 !important;
    outline: 0 !important;

    box-shadow: none !important;
    backdrop-filter: none !important;
    -webkit-backdrop-filter: none !important;
    overflow: visible !important;
  }

  body #mobileMenu::before,
  body #mobileMenu::after {
    display: none !important;
    content: none !important;
  }

  /* Nút Menu là một card riêng */
  body #mobileMenuToggle {
    width: 100% !important;
    min-height: 58px !important;
    margin: 0 !important;
    padding: 12px 18px !important;

    display: flex !important;
    align-items: center !important;
    justify-content: space-between !important;
    gap: 12px !important;

    color: #e2e8f0 !important;
    background: rgba(15, 23, 42, 0.90) !important;
    border: 1px solid rgba(148, 163, 184, 0.22) !important;
    border-radius: 18px !important;
    box-shadow: 0 10px 28px rgba(15, 23, 42, 0.16) !important;
  }

  body #mobileMenuToggle .sidebar-label,
  body #mobileMenuToggle .sidebar-caret {
    color: #e2e8f0 !important;
    opacity: 1 !important;
  }

  body #mobileMenuToggle .sidebar-icon {
    color: #8b5cf6 !important;
  }

  /* Khung xổ xuống không có nền/card lớn */
  body #mobileMenuPanel {
    display: none !important;
    width: 100% !important;
    margin: 12px 0 0 !important;
    padding: 0 !important;

    background: transparent !important;
    border: 0 !important;
    border-radius: 0 !important;
    box-shadow: none !important;
  }

  body #mobileMenu.open #mobileMenuPanel {
    display: grid !important;
    grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
    gap: 10px !important;
  }

  /* Mỗi mục menu là một card riêng, chữ dễ đọc */
  body #mobileMenuPanel .sidebar-item {
    width: 100% !important;
    min-width: 0 !important;
    min-height: 58px !important;
    margin: 0 !important;
    padding: 11px 13px !important;

    display: flex !important;
    align-items: center !important;
    justify-content: flex-start !important;
    gap: 10px !important;

    color: #e2e8f0 !important;
    background: rgba(15, 23, 42, 0.88) !important;
    border: 1px solid rgba(148, 163, 184, 0.20) !important;
    border-radius: 16px !important;
    box-shadow: 0 8px 22px rgba(15, 23, 42, 0.12) !important;
  }

  body #mobileMenuPanel .sidebar-label {
    color: #e2e8f0 !important;
    opacity: 1 !important;
    font-weight: 600 !important;
  }

  body #mobileMenuPanel .sidebar-icon {
    color: #8b5cf6 !important;
    opacity: 1 !important;
  }

  body #mobileMenuPanel .sidebar-footer {
    display: contents !important;
  }
}

@media (max-width: 430px) {
  body #mobileMenu.open #mobileMenuPanel {
    grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
  }

  body #mobileMenuPanel .sidebar-item {
    min-height: 54px !important;
    padding: 10px !important;
  }

  body #mobileMenuPanel .sidebar-label {
    font-size: 14px !important;
  }
}
/* Khung phản hồi + giải thích: màu cho nền sáng (trước đây dùng màu nền tối nên chữ gần như trắng) */
.feedback.correct {
  background: #ecfdf5;
  border: 1px solid #a7f3d0;
  color: #166534;
}

.feedback.incorrect,
.feedback.wrong {
  background: #fef2f2;
  border: 1px solid #fecaca;
  color: #b91c1c;
}

.feedback-result {
  font-weight: 600;
}

.answer-explanation {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid rgba(15, 23, 42, 0.12);
  line-height: 1.6;
}

.answer-explanation strong {
  display: block;
  margin-bottom: 5px;
  color: #b45309;
}

.answer-explanation span {
  color: #1e293b;
}