:root {
  --canvas: #f5f6f8;
  --surface: #ffffff;
  --surface-soft: #fafafa;
  --ink: #101828;
  --ink-soft: #344054;
  --ink-muted: #667085;
  --line: #d0d5dd;
  --line-strong: #98a2b3;
  --primary: #0f172a;
  --accent: #f97316;
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-pill: 999px;
  --shadow-soft: 0 10px 30px rgba(16, 24, 40, 0.06);
  --font-body: 'Raleway', system-ui, sans-serif;
  --font-heading: 'Raleway', system-ui, sans-serif;
  --header-height: 74px;
}


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

html,
body {
  min-height: 100%;
}

body {
  font-family: var(--font-body);
  color: var(--ink);
  background: radial-gradient(circle at 88% 18%, rgba(251, 113, 133, 0.18), transparent 20%),
    radial-gradient(circle at 84% 24%, rgba(56, 189, 248, 0.12), transparent 24%),
    var(--canvas);
  line-height: 1.55;
  padding: 10px;
}

body.drawer-open {
  overflow: hidden;
}

h1,
h2,
h3 {
  font-family: var(--font-heading);
  letter-spacing: -0.01em;
  color: var(--ink);
}

h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  line-height: 1.1;
}

h2 {
  font-size: clamp(1.5rem, 2.4vw, 2.2rem);
  margin-bottom: 0.45rem;
}

h3 {
  font-size: 1.1rem;
  margin-bottom: 0.85rem;
}

p {
  color: var(--ink-soft);
}

.hidden {
  display: none !important;
}

.app-header,
.main-content {
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
}

.app-header {
  position: relative;
  top: auto;
  z-index: 120;
  height: 74px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 22px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-bottom: none;
  border-radius: 16px 16px 0 0;
  box-shadow: var(--shadow-soft);
  overflow: hidden;
}

.app-header::before {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 12px;
  background: #0f172a;
  border-radius: 16px 16px 0 0;
}

.brand {
  font-family: var(--font-heading);
  font-size: 1.02rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  text-transform: none;
}

.brand-wrap {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.brand-note {
  font-size: 0.54rem;
  color: var(--ink-muted);
  opacity: 0.9;
  line-height: 1;
}

.brand span {
  color: var(--ink-muted);
  font-weight: 600;
}

.nav-links {
  display: none;
  gap: 8px;
}

.nav-btn,
.drawer-link {
  border: 1px solid transparent;
  background: transparent;
  color: var(--ink-soft);
  border-radius: var(--radius-pill);
  padding: 10px 16px;
  font-weight: 600;
  cursor: pointer;
  transition: 0.2s ease;
}

.drawer-link {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  text-align: left;
  gap: 12px;
  width: 100%;
}

.nav-btn:hover,
.drawer-link:hover {
  border-color: var(--line);
  color: var(--ink);
  background: var(--surface-soft);
}

.nav-btn.active,
.drawer-link.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #ffffff;
}

.nav-btn:disabled,
.drawer-link:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.exam-picker-header {
  display: none;
}

.hamburger-btn {
  border: 1px solid var(--line);
  border-radius: 12px;
  width: 42px;
  height: 42px;
  font-size: 1rem;
  color: var(--ink);
  background: var(--surface);
  cursor: pointer;
}

.drawer-overlay {
  position: fixed;
  inset: 0;
  background: rgba(16, 24, 40, 0.22);
  z-index: 200;
}

.mobile-drawer {
  position: fixed;
  top: 0;
  right: -320px;
  width: 300px;
  height: 100vh;
  padding: 20px;
  z-index: 210;
  background: var(--surface);
  border-left: 1px solid var(--line);
  box-shadow: var(--shadow-soft);
  transition: right 0.22s ease;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.mobile-drawer.open {
  right: 0;
}

.drawer-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}

.drawer-section {
  margin-bottom: 12px;
}

.drawer-label {
  display: block;
  margin-bottom: 6px;
  font-size: 0.74rem;
  letter-spacing: 0.06em;
  color: var(--ink-muted);
  text-transform: uppercase;
  font-weight: 700;
}

.drawer-footer-note {
  padding-top: 14px;
  padding-bottom: 42px;
  border-top: 1px solid var(--line);
  display: grid;
  gap: 4px;
  color: var(--ink-muted);
  font-size: 0.8rem;
}

.drawer-footer-note a {
  color: var(--ink);
  text-decoration: none;
  font-weight: 700;
}

.drawer-footer-note a:hover {
  text-decoration: underline;
}

.main-content {
  background: var(--surface);
  border: 1px solid var(--line);
  border-top: none;
  border-radius: 0 0 16px 16px;
  padding: 20px;
  margin-bottom: 24px;
  box-shadow: var(--shadow-soft);
}

.view {
  display: none;
}

.view.active {
  display: block;
  animation: reveal 0.25s ease;
}

@keyframes reveal {
  from {
    opacity: 0;
    transform: translateY(10px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero-panel {
  margin-bottom: 18px;
  max-width: 800px;
}

.hero-panel h1 {
  margin-top: 4px;
  margin-bottom: 6px;
}

.hero-panel p {
  margin-top: 10px;
  font-size: 0.97rem;
  color: var(--ink-soft);
}

.hero-actions {
  margin-top: 16px;
  max-width: 320px;
}

.hero-chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 6px 12px;
  border: 1px solid var(--ink);
  border-radius: var(--radius-pill);
  color: var(--ink);
  font-size: 0.78rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.glass-card {
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-soft);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: all 0.3s ease;
}

.section-hint {
  font-size: 0.85rem;
  color: var(--ink-muted);
  font-weight: 500;
  margin-bottom: 0.75rem;
  display: block;
}


.btn {
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  padding: 10px 14px;
  font-size: 0.9rem;
  font-weight: 700;
  cursor: pointer;
  transition: 0.2s ease;
}

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

.btn-primary:hover {
  opacity: 0.92;
}

.btn-secondary {
  background: #ffffff;
  border-color: var(--line-strong);
  color: var(--ink);
}

.btn-secondary:hover {
  border-color: var(--ink);
}

.btn-large {
  width: 100%;
}

.exam-dropdown,
#search-input,
.quiz-input-minimal {
  width: 100%;
  border: 1px solid var(--line-strong);
  border-radius: 12px;
  color: var(--ink);
  background: #ffffff;
  padding: 10px 12px;
  font: inherit;
}

#search-input::placeholder {
  color: var(--ink-muted);
}

#search-input:focus,
.exam-dropdown:focus,
.quiz-input-minimal:focus {
  outline: 2px solid rgba(15, 23, 42, 0.15);
  border-color: var(--ink);
}

.filter-card {
  margin-bottom: 16px;
}

.search-top-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  margin-bottom: 12px;
}

.filter-controls {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}

.custom-dropdown {
  position: relative;
}

.dropdown-toggle {
  width: 100%;
  border: 1px solid var(--line-strong);
  border-radius: 12px;
  padding: 10px 12px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: #ffffff;
  color: var(--ink);
  cursor: pointer;
  font-weight: 600;
}

.dropdown-menu {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  width: 100%;
  max-height: 280px;
  overflow-y: auto;
  border: 1px solid var(--line-strong);
  border-radius: 12px;
  background: #ffffff;
  padding: 8px;
  z-index: 80;
  box-shadow: var(--shadow-soft);
}

.checkbox-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px;
  border-radius: 8px;
  color: var(--ink-soft);
}

.checkbox-item:hover {
  background: var(--surface-soft);
}

.action-row {
  margin-top: 12px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.active-filters-list {
  margin-top: 10px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.pill,
.chip,
.tag {
  border: 1px solid var(--line-strong);
  background: #ffffff;
  color: var(--ink-soft);
  border-radius: var(--radius-pill);
  padding: 5px 11px;
  font-size: 0.84rem;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.pill-remove {
  cursor: pointer;
  color: var(--ink);
  font-weight: 700;
}

.loader {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface-soft);
  color: var(--ink-soft);
  padding: 10px 12px;
  margin-bottom: 10px;
}

.result-list.loading {
  opacity: 0.65;
}

.result-card {
  margin-bottom: 14px;
  border-radius: 12px;
  border-left: 1px solid var(--line);
  border-right: 1px solid var(--line);
  border-top: 1px solid var(--line);
  padding: 14px;
}

.result-card:first-child {
  padding-top: 12px;
}

.result-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 10px;
}

.meta-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.meta-qno {
  font-size: 0.82rem;
  color: var(--ink-muted);
  font-weight: 700;
}

.result-question {
  color: var(--ink);
  font-size: 1rem;
  margin-bottom: 12px;
}

.result-options {
  display: grid;
  gap: 8px;
}

.opt {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #ffffff;
  color: var(--ink);
  padding: 10px 12px;
  text-align: left;
  font: inherit;
}

.opt.interactive {
  cursor: pointer;
}

.opt.interactive:hover {
  border-color: var(--ink);
}

.opt.selected {
  border-color: var(--ink);
  background: #f2f4f7;
}

.opt.correct {
  border-color: #039855;
  background: #ecfdf3;
}

.opt.incorrect {
  border-color: #d92d20;
  background: #fef3f2;
}

.answer-panel {
  margin-top: 10px;
}

.answer-panel summary {
  cursor: pointer;
  font-weight: 700;
  color: var(--ink);
}

.answer-box {
  margin-top: 8px;
  padding-top: 8px;
  border-top: 1px dashed var(--line);
}

.empty-state {
  border: 1px dashed var(--line-strong);
  border-radius: 12px;
  padding: 18px;
  color: var(--ink-muted);
  text-align: center;
}

.pagination-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-top: 10px;
}

#pagination-info {
  color: var(--ink-muted);
  font-weight: 600;
  font-size: 0.9rem;
}

.analytics-header-row {
  margin-bottom: 14px;
}

.kpi-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  margin-bottom: 14px;
}

.kpi-card span {
  color: var(--ink-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-size: 0.72rem;
}

.kpi-card strong {
  font-size: 1.75rem;
}

.analytics-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.chart-wrap {
  height: 280px;
}

.chart-wrap.small {
  height: 220px;
}

.chart-wrap.medium {
  height: 300px;
}

.dist-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.custom-legend {
  display: grid;
  gap: 8px;
}

.legend-item-wrap {
  cursor: pointer;
  border: 1px solid transparent;
  border-radius: 8px;
  transition: all 0.2s ease;
}

.legend-item-wrap:hover {
  background: var(--surface-soft);
  border-color: var(--line);
}

.legend-item-wrap.expanded {
  background: var(--surface-soft);
  border-color: var(--line);
  padding-bottom: 4px;
}

.legend-item {
  display: grid;
  grid-template-columns: 12px 1fr auto 20px;
  align-items: center;
  gap: 8px;
  color: var(--ink-soft);
  padding: 6px 8px;
}

.legend-color {
  width: 12px;
  height: 12px;
  border-radius: 3px;
}

.legend-chevron {
  font-size: 0.65rem;
  color: var(--ink-muted);
  transition: transform 0.25s ease;
  text-align: center;
  opacity: 0.7;
}

.expanded .legend-chevron {
  transform: rotate(180deg);
}

.subtopic-list {
  margin-left: 28px;
  margin-right: 8px;
  margin-top: 2px;
  padding-top: 6px;
  padding-bottom: 6px;
  border-top: 1px dashed var(--line);
  display: grid;
  gap: 4px;
  animation: slideDown 0.25s ease-out;
}

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-5px); }
  to { opacity: 1; transform: translateY(0); }
}

.subtopic-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.78rem;
  color: var(--ink-muted);
  padding: 2px 0;
}

.subtopic-count {
  font-weight: 600;
  color: var(--ink-soft);
}

.resume-banner {
  margin-bottom: 12px;
  display: grid;
  align-items: center;
  justify-content: stretch;
  gap: 8px;
}

.resume-banner p {
  color: var(--ink);
  font-weight: 600;
}

.resume-actions {
  display: flex;
  gap: 8px;
}

.quiz-layer {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  max-width: 800px;
  margin: 0 auto;
  transition: all 0.3s ease;
}

/* Fullscreen Mode Overrides */
body.fullscreen-mode {
  padding: 0;
  overflow: hidden;
  background: var(--surface) !important; /* Solid background to remove gradients */
}

body.fullscreen-mode .app-header,
body.fullscreen-mode .hero-panel,
body.fullscreen-mode .brand-wrap {
  display: none !important;
}

body.fullscreen-mode .main-content {
  max-width: none;
  padding: 0;
  margin: 0;
  height: 100vh;
  display: flex;
  flex-direction: column;
}

body.fullscreen-mode .quiz-layer {
  max-width: none;
  height: 100vh;
  gap: 0;
  flex: 1;
}

body.fullscreen-mode .quiz-layer.no-padding {
  padding: 0;
}

body.fullscreen-mode .glass-card {
  border-radius: 0;
  border: none;
  height: 100%;
  display: flex;
  flex-direction: column;
  padding: 20px;
}

body.fullscreen-mode .quiz-execution-layer {
  width: 100vw;
  height: 100vh;
}


.quiz-setup-card {
  position: relative;
  overflow: hidden;
  min-height: 450px;
  display: flex;
  flex-direction: column;
}

.quiz-setup-step {
  padding: 1rem 0;
  animation: fadeIn 0.4s ease-out;
  flex: 1;
}

.quiz-setup-step.hidden {
  display: none;
}

.setup-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 2rem;
  margin-top: auto;
  border-top: 1px solid rgba(148, 163, 184, 0.1);
}

.step-indicator {
  font-size: 0.875rem;
  color: var(--ink-muted);
  font-weight: 500;
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
  margin: 1.5rem 0;
}

.summary-item {
  background: rgba(255, 255, 255, 0.03);
  padding: 1rem;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.summary-item label {
  display: block;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--ink-muted);
  margin-bottom: 0.5rem;
}

.summary-item .val {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--primary);
}

.quiz-input-minimal {
  background: var(--canvas);
  border: 1px solid var(--line);
  color: var(--ink);
  padding: 0.75rem 1rem;
  border-radius: 8px;
  width: 100%;
  max-width: 200px;
  font-family: inherit;
  transition: all 0.3s ease;
  font-size: 1rem;
  font-weight: 600;
}

.quiz-input-minimal:focus {
  outline: none;
  border-color: var(--primary);
  background: var(--surface);
  box-shadow: 0 0 0 2px rgba(15, 23, 42, 0.1);
}


@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}


.no-padding {
  padding: 0;
}

.setup-row {
  margin-bottom: 14px;
}

.setup-row label {
  display: block;
  color: var(--ink-muted);
  margin-bottom: 8px;
  font-size: 0.84rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  font-weight: 700;
}

.chip-group {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.chip-group.compact .chip {
  padding-inline: 12px;
}

.chip {
  cursor: pointer;
}

.chip.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #ffffff;
}

.summary-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}

.summary-unit {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 12px;
}

.summary-unit label {
  display: block;
  margin-bottom: 4px;
  color: var(--ink-muted);
  font-size: 0.76rem;
  text-transform: uppercase;
  font-weight: 700;
}

.preview-actions,
.result-actions {
  margin-top: 12px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
}

.quiz-top-bar,
.quiz-bottom-bar {
  position: sticky;
  z-index: 40;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: #ffffff;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px;
}

.quiz-top-bar {
  top: 0;
  border-top: none;
}

.quiz-bottom-bar {
  bottom: 0;
}

.btn-icon {
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  background: #ffffff;
  color: var(--ink);
  min-width: 38px;
  min-height: 38px;
}

.header-stat {
  color: var(--ink);
  font-weight: 700;
}

.timer-stat {
  color: var(--ink-soft);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-weight: 700;
}

.nav-strip {
  display: flex;
  gap: 6px;
  overflow-x: auto;
  padding: 10px;
  border-bottom: 1px solid var(--line);
}

.nav-strip::-webkit-scrollbar {
  height: 0;
}

.nav-unit {
  min-width: 34px;
  min-height: 34px;
  border: 1px solid var(--line-strong);
  border-radius: 9px;
  color: var(--ink-soft);
  background: #ffffff;
}

.nav-unit.visited {
  background: #fffaeb;
  border-color: #fdb022;
  color: #b54708;
}

.nav-unit.answered {
  background: #ecfdf3;
  border-color: #12b76a;
  color: #027a48;
}

.nav-unit.marked {
  background: #fef6fb;
  border-color: #ee46bc;
  color: #c11574;
}

.nav-unit.current {
  background: var(--primary);
  border-color: var(--primary);
  color: #ffffff;
}

.quiz-content-area {
  padding: 12px;
}

.confidence-wrap {
  margin-top: 12px;
}

.execution-actions {
  margin-top: 10px;
}

.res-hero {
  text-align: center;
}

.score-val {
  color: var(--ink);
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 800;
}

.score-perc {
  color: var(--ink-muted);
}

.res-stats-grid {
  margin-top: 10px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
}

.stat-unit {
  border: 1px solid var(--line);
  border-radius: 10px;
  text-align: center;
  padding: 9px;
}

.stat-unit label {
  display: block;
  color: var(--ink-muted);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.breakdown-list {
  margin-top: 10px;
  display: grid;
  gap: 7px;
}

.stat-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 8px 10px;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.text-muted {
  color: var(--ink-muted);
}

.coming-soon-card {
  max-width: 680px;
  margin: 36px auto;
  text-align: center;
}

.status-badge {
  display: inline-block;
  margin-bottom: 8px;
  border: 1px solid #fdb022;
  background: #fffaeb;
  color: #b54708;
  border-radius: var(--radius-pill);
  padding: 5px 11px;
  font-size: 0.75rem;
  font-weight: 700;
}

@media (min-width: 900px) {
  body {
    padding: 20px;
  }

  .app-header {
    position: sticky;
    top: 0;
  }

  .main-content {
    padding: 26px;
  }

  .glass-card {
    padding: 18px;
  }

  .hero-panel p {
    font-size: 1.08rem;
  }

  .hidden-sm {
    display: block;
  }

  .nav-links,
  .exam-picker-header {
    display: flex;
    align-items: center;
  }

  .hamburger-btn {
    display: none;
  }

  .search-top-row {
    grid-template-columns: 1fr auto;
    gap: 10px;
  }

  .filter-controls {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
  }

  .result-card {
    border-radius: 0;
    border-left: none;
    border-right: none;
    border-top: none;
    padding-left: 0;
    padding-right: 0;
  }

  .result-card:first-child {
    border-top: 1px solid var(--line);
    padding-top: 16px;
  }

  .kpi-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .analytics-grid {
    grid-template-columns: 1.3fr 1fr;
  }

  .analytics-grid article:last-child {
    grid-column: 1 / -1;
  }

  .dist-layout {
    grid-template-columns: 280px 1fr;
    align-items: center;
  }

  .summary-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .preview-actions,
  .result-actions {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .resume-banner {
    display: flex;
    justify-content: space-between;
    gap: 10px;
  }
}

.question-meta {
  font-size: 0.8rem;
  color: var(--ink-muted);
  font-weight: 500;
  margin-top: 0.25rem;
  margin-bottom: 1.5rem;
  opacity: 0.8;
}