/* ==========================================================================
   ExamVerse — Core Layout, Typography & Component Styles (css/main.css)
   Supports 360px - 1920px+ Responsive Screens, Bangla & English Typography
   ========================================================================== */

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

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

body {
  font-family: 'Plus Jakarta Sans', 'Inter', 'Hind Siliguri', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  line-height: 1.55;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

.font-bn {
  font-family: 'Hind Siliguri', 'Plus Jakarta Sans', sans-serif;
}

.font-mono {
  font-family: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

/* App Shell Layout */
.ev-app-shell {
  display: flex;
  min-height: 100vh;
  width: 100%;
  max-width: 100vw;
}

/* Desktop Sidebar */
.ev-sidebar {
  width: 256px;
  flex-shrink: 0;
  background-color: var(--bg-sidebar);
  border-right: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 40;
  padding: 1.25rem 0.875rem;
}

.ev-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.375rem 0.625rem 1.25rem;
  border-bottom: 1px solid var(--border-subtle);
  margin-bottom: 1rem;
  cursor: pointer;
  text-decoration: none;
  color: var(--text-primary);
}

.ev-brand-mark {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: var(--brand-primary);
  color: #FFFFFF;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: 0 2px 8px rgba(67, 56, 202, 0.25);
}

.ev-brand-text {
  display: flex;
  flex-direction: column;
}

.ev-brand-title {
  font-size: 1.15rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.15;
  color: var(--text-primary);
}

.ev-brand-subtitle {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
}

/* Sidebar Navigation */
.ev-nav-section-label {
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--text-faint);
  padding: 0.5rem 0.75rem 0.35rem;
}

.ev-nav-list {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  list-style: none;
}

.ev-nav-btn {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 0.625rem 0.75rem;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  background: transparent;
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  text-align: left;
  font-family: inherit;
}

.ev-nav-btn-left {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.ev-nav-btn svg {
  width: 19px;
  height: 19px;
  flex-shrink: 0;
  stroke-width: 1.85;
}

.ev-nav-btn:hover {
  background-color: var(--bg-surface-hover);
  color: var(--text-primary);
}

.ev-nav-btn.is-active {
  background-color: var(--brand-primary-soft);
  color: var(--brand-primary);
  border-color: var(--brand-primary-border);
  font-weight: 700;
}

.ev-nav-count {
  font-size: 0.72rem;
  font-weight: 700;
  padding: 0.1rem 0.45rem;
  border-radius: var(--radius-full);
  background-color: var(--bg-surface-muted);
  color: var(--text-secondary);
}

.ev-nav-btn.is-active .ev-nav-count {
  background-color: var(--brand-primary);
  color: #FFFFFF;
}

.ev-sidebar-footer {
  margin-top: auto;
  padding-top: 0.875rem;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

/* Main Content Wrapper */
.ev-main-wrapper {
  flex: 1;
  margin-left: 256px;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  max-width: calc(100vw - 256px);
}

/* Top Header Bar */
.ev-topbar {
  position: sticky;
  top: 0;
  z-index: 30;
  background-color: var(--bg-glass);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-subtle);
  padding: 0.75rem 1.75rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.ev-topbar-left {
  display: flex;
  align-items: center;
  gap: 0.875rem;
  min-width: 0;
}

.ev-mobile-logo {
  display: none;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  color: var(--text-primary);
  cursor: pointer;
}

.ev-greeting-wrap {
  min-width: 0;
}

.ev-greeting-title {
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.ev-greeting-sub {
  font-size: 0.78rem;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.ev-topbar-right {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  flex-shrink: 0;
}

/* Compact Streak Indicator (Small & Elegant per Specification) */
.ev-streak-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.35rem 0.65rem;
  border-radius: var(--radius-full);
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--text-primary);
  cursor: pointer;
  box-shadow: var(--shadow-xs);
}

.ev-streak-pill.is-active {
  border-color: var(--status-warning-border);
  background-color: var(--status-warning-bg);
  color: var(--status-warning-text);
}

.ev-flame-svg {
  width: 15px;
  height: 15px;
  flex-shrink: 0;
}

/* Header Icon Buttons (Theme, Lang, Notification) */
.ev-icon-btn {
  position: relative;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
  background-color: var(--bg-surface);
  color: var(--text-secondary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: var(--shadow-xs);
  font-family: inherit;
  font-size: 0.78rem;
  font-weight: 700;
}

.ev-icon-btn:hover {
  background-color: var(--bg-surface-hover);
  color: var(--text-primary);
  border-color: var(--border-default);
}

.ev-icon-btn svg {
  width: 18px;
  height: 18px;
}

.ev-notif-dot {
  position: absolute;
  top: 6px;
  right: 6px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--brand-primary);
  border: 1.5px solid var(--bg-surface);
}

/* User Profile Pill in Header */
.ev-profile-trigger {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.25rem 0.6rem 0.25rem 0.25rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-subtle);
  background-color: var(--bg-surface);
  cursor: pointer;
  color: var(--text-primary);
  font-family: inherit;
}

.ev-profile-trigger:hover {
  border-color: var(--brand-primary-border);
  background-color: var(--bg-surface-hover);
}

.ev-avatar-sm {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--brand-primary), var(--brand-accent));
  color: #FFFFFF;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.76rem;
  font-weight: 700;
  flex-shrink: 0;
}

.ev-profile-trigger-name {
  font-size: 0.82rem;
  font-weight: 600;
  max-width: 110px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Main Content Container */
.ev-content-area {
  flex: 1;
  width: 100%;
  max-width: 1220px;
  margin: 0 auto;
  padding: 1.5rem 1.75rem 3.5rem;
}

/* Academic Decorative Card & Section Headers */
.ev-section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.9rem;
}

.ev-section-title {
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -0.015em;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.ev-section-link {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--brand-primary);
  background: none;
  border: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  font-family: inherit;
}

.ev-section-link:hover {
  text-decoration: underline;
}

/* Cards */
.ev-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-xs);
  padding: 1.25rem;
  position: relative;
  overflow: hidden;
}

/* Subtle Academic Watermark SVG inside Hero/Featured Cards */
.ev-academic-watermark {
  position: absolute;
  right: -12px;
  bottom: -12px;
  width: 140px;
  height: 140px;
  opacity: 0.06;
  pointer-events: none;
  color: var(--brand-primary);
}

/* Grid Utilities */
.ev-grid-2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.ev-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.ev-grid-4 {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
}

.ev-home-top-grid {
  display: grid;
  grid-template-columns: 1.25fr 1fr;
  gap: 1.15rem;
  margin-bottom: 1.5rem;
}

/* Buttons */
.ev-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.58rem 1.05rem;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  border: 1px solid transparent;
  text-decoration: none;
  white-space: nowrap;
}

.ev-btn svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

.ev-btn-primary {
  background-color: var(--brand-primary);
  color: #FFFFFF;
  box-shadow: 0 1px 2px rgba(67, 56, 202, 0.2);
}

.ev-btn-primary:hover:not(:disabled) {
  background-color: var(--brand-primary-hover);
}

.ev-btn-secondary {
  background-color: var(--bg-surface);
  color: var(--text-primary);
  border-color: var(--border-default);
}

.ev-btn-secondary:hover:not(:disabled) {
  background-color: var(--bg-surface-hover);
  border-color: var(--border-strong);
}

.ev-btn-soft {
  background-color: var(--brand-primary-soft);
  color: var(--brand-primary);
  border-color: var(--brand-primary-border);
}

.ev-btn-soft:hover:not(:disabled) {
  background-color: var(--brand-primary);
  color: #FFFFFF;
}

.ev-btn-danger {
  background-color: var(--status-danger-bg);
  color: var(--status-danger);
  border-color: var(--status-danger-border);
}

.ev-btn-danger:hover:not(:disabled) {
  background-color: var(--status-danger);
  color: #FFFFFF;
}

.ev-btn-sm {
  padding: 0.38rem 0.75rem;
  font-size: 0.78rem;
}

.ev-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Badges & Pills */
.ev-badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.2rem 0.58rem;
  border-radius: var(--radius-full);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.ev-badge-indigo {
  background-color: var(--brand-primary-soft);
  color: var(--brand-primary);
  border: 1px solid var(--brand-primary-border);
}

.ev-badge-violet {
  background-color: var(--brand-accent-soft);
  color: var(--brand-accent);
  border: 1px solid var(--brand-accent-border);
}

.ev-badge-success {
  background-color: var(--status-success-bg);
  color: var(--status-success);
  border: 1px solid var(--status-success-border);
}

.ev-badge-warning {
  background-color: var(--status-warning-bg);
  color: var(--status-warning);
  border: 1px solid var(--status-warning-border);
}

.ev-badge-danger {
  background-color: var(--status-danger-bg);
  color: var(--status-danger);
  border: 1px solid var(--status-danger-border);
}

.ev-badge-neutral {
  background-color: var(--bg-surface-muted);
  color: var(--text-secondary);
  border: 1px solid var(--border-subtle);
}

/* Progress Bar */
.ev-progress-track {
  width: 100%;
  height: 8px;
  background-color: var(--bg-surface-muted);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.ev-progress-fill {
  height: 100%;
  background-color: var(--brand-primary);
  border-radius: var(--radius-full);
}

.ev-progress-fill.is-accent {
  background-color: var(--brand-accent);
}

.ev-progress-fill.is-success {
  background-color: var(--status-success);
}

/* Welcome & XP Compact Card */
.ev-welcome-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 1rem;
  background: linear-gradient(180deg, var(--bg-surface) 0%, var(--bg-surface-hover) 100%);
}

.ev-xp-strip {
  background-color: var(--bg-surface-muted);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 0.75rem 0.9rem;
}

/* Daily Challenge Featured Card */
.ev-daily-card {
  border-color: var(--brand-primary-border);
  background: linear-gradient(145deg, var(--bg-surface) 0%, var(--brand-primary-soft) 100%);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 0.9rem;
}

/* Subject Cards */
.ev-subject-card {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  cursor: pointer;
}

.ev-subject-icon-box {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--brand-primary-soft);
  color: var(--brand-primary);
  border: 1px solid var(--brand-primary-border);
  flex-shrink: 0;
}

/* Inputs & Search Filters */
.ev-filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.ev-search-wrap {
  position: relative;
  flex: 1;
  min-width: 210px;
}

.ev-search-icon {
  position: absolute;
  left: 0.85rem;
  top: 50%;
  transform: translateY(-50%);
  width: 17px;
  height: 17px;
  color: var(--text-faint);
  pointer-events: none;
}

.ev-input,
.ev-select {
  width: 100%;
  padding: 0.58rem 0.875rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-default);
  background-color: var(--bg-input);
  color: var(--text-primary);
  font-size: 0.875rem;
  font-family: inherit;
  outline: none;
}

.ev-search-wrap .ev-input {
  padding-left: 2.45rem;
}

.ev-input:focus,
.ev-select:focus {
  border-color: var(--border-focus);
  box-shadow: var(--shadow-focus);
}

/* Exam Category Pills / Tabs */
.ev-category-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.85rem;
  margin-bottom: 1.5rem;
}

.ev-category-card {
  text-align: left;
  cursor: pointer;
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
  padding: 1rem;
  font-family: inherit;
  color: var(--text-primary);
}

.ev-category-card.is-selected {
  border-color: var(--brand-primary);
  background-color: var(--brand-primary-soft);
  box-shadow: var(--shadow-sm);
}

/* ==========================================================================
   Quiz & Examination Interface
   ========================================================================== */
.ev-quiz-layout {
  display: grid;
  grid-template-columns: 1fr 290px;
  gap: 1.25rem;
  align-items: start;
}

.ev-quiz-header-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.9rem 1.15rem;
  margin-bottom: 1rem;
}

.ev-timer-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 700;
  background-color: var(--bg-surface-muted);
  border: 1px solid var(--border-default);
  color: var(--text-primary);
}

.ev-timer-badge.is-urgent {
  background-color: var(--status-danger-bg);
  border-color: var(--status-danger-border);
  color: var(--status-danger);
}

.ev-question-card {
  padding: 1.5rem;
}

.ev-question-text {
  font-size: 1.12rem;
  font-weight: 700;
  line-height: 1.6;
  color: var(--text-primary);
  margin: 0.85rem 0 1.35rem;
}

.ev-options-list {
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
}

.ev-option-btn {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  width: 100%;
  padding: 0.9rem 1rem;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--border-subtle);
  background-color: var(--bg-surface);
  color: var(--text-primary);
  text-align: left;
  font-size: 0.95rem;
  font-weight: 500;
  line-height: 1.45;
  cursor: pointer;
  font-family: inherit;
}

.ev-option-btn:hover:not(:disabled) {
  border-color: var(--brand-primary-border);
  background-color: var(--bg-surface-hover);
}

.ev-option-key {
  width: 30px;
  height: 30px;
  border-radius: 7px;
  border: 1px solid var(--border-default);
  background-color: var(--bg-surface-muted);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  font-weight: 700;
  flex-shrink: 0;
}

/* Selected State (Exam Mode or Before Reveal) */
.ev-option-btn.is-selected {
  border-color: var(--brand-primary);
  background-color: var(--brand-primary-soft);
}

.ev-option-btn.is-selected .ev-option-key {
  background-color: var(--brand-primary);
  border-color: var(--brand-primary);
  color: #FFFFFF;
}

/* Correct Answer State */
.ev-option-btn.is-correct {
  border-color: var(--status-success);
  background-color: var(--status-success-bg);
  color: var(--status-success-text);
  font-weight: 600;
}

.ev-option-btn.is-correct .ev-option-key {
  background-color: var(--status-success);
  border-color: var(--status-success);
  color: #FFFFFF;
}

/* Incorrect Answer State */
.ev-option-btn.is-incorrect {
  border-color: var(--status-danger);
  background-color: var(--status-danger-bg);
  color: var(--status-danger-text);
}

.ev-option-btn.is-incorrect .ev-option-key {
  background-color: var(--status-danger);
  border-color: var(--status-danger);
  color: #FFFFFF;
}

/* Explanation Callout Box */
.ev-explanation-box {
  margin-top: 1.25rem;
  padding: 1rem 1.15rem;
  border-radius: var(--radius-sm);
  background-color: var(--bg-surface-muted);
  border-left: 4px solid var(--brand-primary);
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Question Navigator Palette */
.ev-palette-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0.45rem;
  margin-top: 0.75rem;
}

.ev-palette-dot {
  height: 36px;
  border-radius: var(--radius-xs);
  border: 1px solid var(--border-subtle);
  background-color: var(--bg-surface-muted);
  color: var(--text-secondary);
  font-size: 0.8rem;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  font-family: inherit;
}

.ev-palette-dot.is-current {
  border: 2px solid var(--brand-primary);
  color: var(--brand-primary);
  background-color: var(--bg-surface);
}

.ev-palette-dot.is-answered {
  background-color: var(--brand-primary);
  border-color: var(--brand-primary);
  color: #FFFFFF;
}

.ev-palette-dot.is-correct {
  background-color: var(--status-success);
  border-color: var(--status-success);
  color: #FFFFFF;
}

.ev-palette-dot.is-incorrect {
  background-color: var(--status-danger);
  border-color: var(--status-danger);
  color: #FFFFFF;
}

.ev-palette-dot.is-bookmarked::after {
  content: '';
  position: absolute;
  top: 3px;
  right: 3px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--status-warning);
}

/* ==========================================================================
   Leaderboard & Metallic Top 3 Treatment
   ========================================================================== */
.ev-podium-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.9rem;
  margin-bottom: 1.25rem;
}

.ev-podium-card {
  padding: 1.1rem;
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 0.45rem;
}

.ev-podium-card.rank-1 {
  background: var(--medal-gold-bg);
  border: 1.5px solid var(--medal-gold-border);
}

.ev-podium-card.rank-2 {
  background: var(--medal-silver-bg);
  border: 1.5px solid var(--medal-silver-border);
}

.ev-podium-card.rank-3 {
  background: var(--medal-bronze-bg);
  border: 1.5px solid var(--medal-bronze-border);
}

.ev-table-wrap {
  width: 100%;
  overflow-x: auto;
}

.ev-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}

.ev-table th {
  text-align: left;
  padding: 0.75rem 1rem;
  font-size: 0.73rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border-subtle);
}

.ev-table td {
  padding: 0.8rem 1rem;
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-primary);
}

.ev-table tr.is-current-user {
  background-color: var(--brand-primary-soft);
  font-weight: 700;
}

/* ==========================================================================
   Metallic Geometric Badges
   ========================================================================== */
.ev-badge-card {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.9rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
  background-color: var(--bg-surface);
}

.ev-badge-card.is-locked {
  opacity: 0.58;
  filter: grayscale(0.75);
}

.ev-hex-medal {
  width: 46px;
  height: 46px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Toggle Switch (Settings) */
.ev-switch {
  position: relative;
  display: inline-block;
  width: 44px;
  height: 24px;
  flex-shrink: 0;
}

.ev-switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.ev-switch-slider {
  position: absolute;
  cursor: pointer;
  inset: 0;
  background-color: var(--border-default);
  border-radius: 24px;
  transition: 0.2s;
}

.ev-switch-slider::before {
  position: absolute;
  content: "";
  height: 18px;
  width: 18px;
  left: 3px;
  bottom: 3px;
  background-color: #FFFFFF;
  border-radius: 50%;
  transition: 0.2s;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

.ev-switch input:checked + .ev-switch-slider {
  background-color: var(--brand-primary);
}

.ev-switch input:checked + .ev-switch-slider::before {
  transform: translateX(20px);
}

/* Modals & Notification Popover */
.ev-modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 80;
  background-color: rgba(15, 23, 42, 0.55);
  backdrop-filter: blur(4px);
  display: none;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

.ev-modal-backdrop.is-open {
  display: flex;
}

.ev-modal-panel {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 560px;
  max-height: 88vh;
  overflow-y: auto;
  padding: 1.5rem;
}

/* Toast Notification */
.ev-toast {
  position: fixed;
  bottom: 5rem;
  left: 50%;
  transform: translate(-50%, 16px);
  z-index: 95;
  background-color: var(--text-primary);
  color: var(--bg-surface);
  padding: 0.65rem 1.15rem;
  border-radius: var(--radius-full);
  font-size: 0.84rem;
  font-weight: 600;
  box-shadow: var(--shadow-lg);
  display: none;
  align-items: center;
  gap: 0.5rem;
  pointer-events: none;
}

.ev-toast.is-visible {
  display: inline-flex;
}

/* Mobile Bottom Navigation */
.ev-bottom-nav {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 50;
  background-color: var(--bg-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-top: 1px solid var(--border-subtle);
  padding: 0.35rem 0.5rem calc(0.35rem + env(safe-area-inset-bottom, 0px));
  justify-content: space-around;
  align-items: center;
}

.ev-bottom-nav-btn {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.2rem;
  padding: 0.35rem 0.25rem;
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-size: 0.68rem;
  font-weight: 600;
  cursor: pointer;
  border-radius: var(--radius-xs);
  font-family: inherit;
  min-height: 46px;
}

.ev-bottom-nav-btn svg {
  width: 20px;
  height: 20px;
  stroke-width: 1.9;
}

.ev-bottom-nav-btn.is-active {
  color: var(--brand-primary);
  font-weight: 700;
}

/* ==========================================================================
   Responsive Breakpoints (Tablet & Mobile 360px - 1024px)
   ========================================================================== */
@media (max-width: 1024px) {
  .ev-quiz-layout {
    grid-template-columns: 1fr;
  }
  .ev-grid-4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .ev-category-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 820px) {
  .ev-sidebar {
    display: none;
  }
  .ev-main-wrapper {
    margin-left: 0;
    max-width: 100vw;
  }
  .ev-mobile-logo {
    display: inline-flex;
  }
  .ev-bottom-nav {
    display: flex;
  }
  .ev-topbar {
    padding: 0.65rem 1rem;
  }
  .ev-content-area {
    padding: 1rem 1rem 5.75rem;
  }
  .ev-home-top-grid,
  .ev-grid-3 {
    grid-template-columns: 1fr;
  }
  .ev-profile-trigger-name {
    display: none;
  }
}

@media (max-width: 560px) {
  .ev-grid-2,
  .ev-grid-4,
  .ev-category-grid,
  .ev-podium-grid {
    grid-template-columns: 1fr;
  }
  .ev-greeting-sub {
    display: none;
  }
  .ev-greeting-title {
    font-size: 0.92rem;
  }
  .ev-card {
    padding: 1rem;
  }
  .ev-question-card {
    padding: 1.1rem;
  }
  .ev-question-text {
    font-size: 1rem;
  }
  .ev-option-btn {
    padding: 0.75rem 0.85rem;
    font-size: 0.88rem;
  }
}