/* ========================================
   1-base.css
   ======================================== */

/**
 * Base Styles - Variables, Reset, Typography, Base Elements
 */

:root {
  color-scheme: light;
  font-family: var(--font-sans);
  /* Index-card editorial type system: Fraunces display, Newsreader body,
     Spline Sans Mono for stamps/labels/counters. Mirrors tailwind.config.js. */
  --font-sans: 'Newsreader', Georgia, Cambria, 'Times New Roman', serif;
  --font-display: 'Fraunces', Georgia, serif;
  --font-mono: 'Spline Sans Mono', ui-monospace, SFMono-Regular, Menlo, monospace;


  /* Color tokens — cool paper & ink, cobalt accent (matches remapped
     Tailwind `slate`/`orange` scales) */
  --color-bg: #eff1f3;
  --color-surface: #fdfdfe;
  --color-surface-subtle: #eff1f3;
  --color-surface-strong: #e1e4e8;
  --color-muted: #515a64;
  --color-strong: #1a1f25;
  --color-border: #c8cdd4;
  --color-border-strong: #99a1ab;
  --color-accent: #4763d6;
  --color-accent-strong: #3850bd;
  --color-accent-soft: rgba(71, 99, 214, 0.1);
  --color-accent-alt: #38827a;
  --color-success: #2f7a5f;
  --color-warning: #9a7b1f;
  --color-error: #b3362c;
  --press-shadow: #1a1f25;
  --rule-line: rgba(153, 161, 171, 0.3);

  /* Typography scale */
  --h1-size: 2.25rem;
  --h1-weight: 600;
  --h2-size: 1.75rem;
  --h2-weight: 600;
  --h3-size: 1.25rem;
  --h3-weight: 500;
  --body-size: 1rem;
  --body-weight: 400;
  --caption-size: 0.8125rem;
  --caption-weight: 400;
  --line-height-tight: 1.25;
  --line-height-relaxed: 1.5;

  /* Spacing scale */
  --space-unit: 8px;
  --space-stack-xs: 4px;
  --space-stack-sm: 8px;
  --space-stack-md: 16px;
  --space-stack-lg: 24px;
  --space-stack-xl: 32px;
  --space-stack-2xl: 48px;

  /* Radius */
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --radius-pill: 999px;

  /* Elevation */
  --shadow-soft: 0 2px 12px rgba(17, 19, 24, 0.08);
  --shadow-mid: 0 6px 20px rgba(17, 19, 24, 0.1);

  /* Motion */
  --motion-duration-fast: 150ms;
  --motion-duration-medium: 200ms;
  --motion-ease: cubic-bezier(0.4, 0, 0.2, 1);

  /* Layout */
  --layout-max-width: 1200px;
  --layout-gutter: 24px;
  --layout-gutter-wide: 36px;
}



[data-theme='dark'] {
  color-scheme: dark;
  /* Midnight ink: cool near-black, lamplit cobalt */
  --color-bg: #101418;
  --color-surface: #1a1f25;
  --color-surface-subtle: #232931;
  --color-surface-strong: #323a44;
  --color-muted: #99a1ab;
  --color-strong: #eff1f3;
  --color-border: #323a44;
  --color-border-strong: #515a64;
  --color-accent: #7d96f0;
  --color-accent-strong: #6c86e3;
  --color-accent-soft: rgba(125, 150, 240, 0.16);
  --press-shadow: #05070a;
  --rule-line: rgba(153, 161, 171, 0.16);
  --shadow-soft: 0 2px 16px rgba(2, 4, 7, 0.6);
  --shadow-mid: 0 12px 28px rgba(2, 4, 7, 0.55);
}

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

/* Keep the hidden attribute authoritative even against component styles */
[hidden] {
  display: none !important;
}

/* Unclassed form controls follow the theme tokens. Attribute selectors match
   the @tailwindcss/forms reset's specificity; loading after tailwind.css wins
   the tie, while Tailwind utility classes still override when present. */
input[type='text'],
input[type='password'],
input[type='email'],
input[type='url'],
input[type='search'],
input[type='number'],
select,
textarea {
  background-color: var(--color-surface);
  color: var(--color-strong);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 0.5rem 0.75rem;
}

/* @tailwindcss/forms paints checked boxes with currentColor — keep them on brand */
input[type='checkbox'],
input[type='radio'] {
  color: var(--color-accent);
  accent-color: var(--color-accent);
}


body {
  margin: 0;
  min-height: 100vh;
  background: var(--color-bg);
  color: var(--color-strong);
  font-family: var(--font-sans);
  font-size: var(--body-size);
  font-weight: var(--body-weight);
  line-height: var(--line-height-relaxed);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* ----------------------------------------
   Paper atmosphere: grain film + desk-lamp vignette
   ---------------------------------------- */

body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 80;
  pointer-events: none;
  opacity: 0.05;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

[data-theme='dark'] body::after {
  opacity: 0.07;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background: radial-gradient(120% 70% at 50% 0%, rgba(253, 253, 254, 0.7), transparent 60%);
}

[data-theme='dark'] body::before {
  background: radial-gradient(110% 65% at 50% 0%, rgba(125, 150, 240, 0.06), transparent 60%);
}

/* Display serif for headings */
h1, h2, h3, h4, .font-display {
  font-family: var(--font-display);
  letter-spacing: -0.01em;
}

/* Keyboard keycaps as letterpress stamps */
kbd {
  font-family: var(--font-mono);
  font-size: 0.85em;
  color: var(--color-strong);
  background: var(--color-surface);
  border: 1px solid var(--color-border-strong);
  border-radius: 4px;
  padding: 0.05em 0.4em;
  box-shadow: 1px 1px 0 var(--press-shadow);
}

/* ----------------------------------------
   Motion: staggered page deal-in + ink reveal
   ---------------------------------------- */

@keyframes rise-in {
  from { opacity: 0; transform: translateY(14px); }
  to { opacity: 1; transform: none; }
}

@keyframes ink-in {
  from { opacity: 0; transform: translateY(6px); filter: blur(3px); }
  to { opacity: 1; transform: none; filter: blur(0); }
}

@keyframes card-deal {
  from { opacity: 0; transform: translateY(10px) rotate(0.4deg); }
  to { opacity: 1; transform: none; }
}

@media (prefers-reduced-motion: no-preference) {
  main#main-content > * > * {
    animation: rise-in 0.5s var(--motion-ease) backwards;
  }
  main#main-content > * > *:nth-child(2) { animation-delay: 70ms; }
  main#main-content > * > *:nth-child(3) { animation-delay: 140ms; }
  main#main-content > * > *:nth-child(4) { animation-delay: 210ms; }
  main#main-content > * > *:nth-child(5) { animation-delay: 280ms; }
  main#main-content > * > *:nth-child(n+6) { animation-delay: 340ms; }

  .qa-card {
    animation: card-deal 0.35s var(--motion-ease) backwards;
  }

  .qa-card__answer:not([hidden]) {
    animation: ink-in 0.4s var(--motion-ease) backwards;
  }
}



.session-page__body {
  display: flex;
  flex-direction: column;
  gap: clamp(1.25rem, 3vw, 2rem);
}


.qa-card {
  width: 100%;
  max-width: 100%;
  display: flex;
  flex-direction: column;
  gap: clamp(1.5rem, 3vw, 2rem);
}

.qa-card__body {
  display: flex;
  flex-direction: column;
  gap: clamp(1rem, 2vw, 1.5rem);
}


.hint-toggle {
  align-self: flex-start;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: var(--color-surface-subtle);
  padding: 0.5rem 1rem;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--color-muted);
  transition: border 0.2s ease, transform 0.2s ease, background 0.2s ease;
}

.hint-toggle:hover,
.hint-toggle:focus {
  border-color: var(--color-border-strong);
  background: var(--color-surface-strong);
  transform: translateY(-1px);
}

.hint-body {
  border-left: 4px solid var(--color-success);
  background: rgba(42, 125, 108, 0.1);
  padding: 1rem 1.25rem;
  border-radius: 8px;
  color: var(--color-strong);
  line-height: 1.6;
  font-size: 1rem;
}



/* ----------------------------------------
   Utility helpers
   ---------------------------------------- */

.u-flex {
  display: flex;
  gap: var(--space-stack-sm);
}

.u-flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-stack-sm);
}

.u-stack-sm {
  display: flex;
  flex-direction: column;
  gap: var(--space-stack-sm);
}

.u-stack-md {
  display: flex;
  flex-direction: column;
  gap: var(--space-stack-md);
}

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

.u-text-strong {
  color: var(--color-strong);
  font-weight: 600;
}

.u-visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}


/* ========================================
   2-layout.css
   ======================================== */

/**
 * Layout - Topbar, Navigation, Page Structure, Containers
 */

a {
  color: var(--color-accent);
  text-decoration: none;
  font-weight: 500;
}

a:hover,
a:focus {
  text-decoration: underline;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px rgba(75, 131, 245, 0.25);
}


.page-header {
  display: grid;
  gap: var(--space-stack-sm);
  align-items: start;
}


.page-header--centered {
  text-align: center;
  justify-items: center;
}


.page-header h1 {
  margin: 0;
  font-size: clamp(var(--h2-size), 4vw, var(--h1-size));
  font-weight: var(--h1-weight);
  line-height: var(--line-height-tight);
}


.page-subtitle {
  margin: 0;
  max-width: 60ch;
  color: var(--color-muted);
  font-size: 1rem;
}

.page-header__actions {
  display: flex;
  gap: var(--space-stack-sm);
  flex-wrap: wrap;
  align-items: center;
}



.section-title {
  margin: 0 0 var(--space-stack-md);
  font-size: 1.2rem;
  font-weight: 600;
}



.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.auth-layout {
  display: flex;
  justify-content: center;
}


/* Quiz Select - Compact Redesign */
.quiz-select-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  padding: 0 1rem;
}


.quiz-select-container .alert {
  width: min(420px, 100%);
}


.settings-container {
  display: flex;
  justify-content: center;
}



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


.sr-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.5rem, 4vw, 2.5rem);
}


/* ========================================
   3-components.css
   ======================================== */

/**
 * Components - Buttons, Cards, Forms, Alerts, Modals, Badges
 */

.card {
  display: flex;
  flex-direction: column;
  gap: var(--space-stack-md);
  background: var(--color-surface);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-soft);
  padding: clamp(1.25rem, 3vw, 1.75rem);
}

.alert {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: start;
  gap: var(--space-stack-sm);
  padding: 0.85rem 1.1rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background: var(--color-surface-subtle);
  font-weight: 500;
  color: var(--color-strong);
}

.alert--success {
  border-color: rgba(48, 164, 108, 0.4);
  background: rgba(48, 164, 108, 0.12);
  color: #1e7a53;
}

.alert--error {
  border-color: rgba(229, 72, 77, 0.45);
  background: rgba(229, 72, 77, 0.12);
  color: var(--color-error);
}

.alert--warning {
  border-color: rgba(241, 161, 13, 0.45);
  background: rgba(241, 161, 13, 0.12);
  color: #9b6a05;
}

.btn,
.btn-primary,
.btn-secondary,
.btn-tertiary,
.btn-muted,
.btn-danger,
.topbar__cta,
.icon-button {
  display: inline-flex;
  flex-direction: var(--btn-direction, row);
  align-items: var(--btn-align, center);
  justify-content: var(--btn-justify, center);
  gap: var(--btn-gap, 0.5rem);
  min-height: var(--btn-min-height, 40px);
  padding-inline: var(--btn-padding-inline, 1.25rem);
  padding-block: var(--btn-padding-block, 0);
  border-radius: var(--btn-radius, var(--radius-md));
  border: 1.5px solid transparent;
  text-decoration: none;
  text-align: var(--btn-text-align, center);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background var(--motion-duration-fast) var(--motion-ease),
    color var(--motion-duration-fast) var(--motion-ease),
    border-color var(--motion-duration-fast) var(--motion-ease),
    box-shadow var(--motion-duration-fast) var(--motion-ease),
    transform var(--motion-duration-fast) var(--motion-ease);
}

.btn-sm {
  --btn-min-height: 32px;
  --btn-padding-inline: 0.95rem;
  font-size: 0.85rem;
}

.btn-large {
  --btn-min-height: 48px;
  --btn-padding-inline: 1.5rem;
  font-size: 1rem;
  min-width: 160px;
}

.btn-primary {
  background: var(--color-accent);
  color: #fffdf6;
  border-color: var(--press-shadow);
  box-shadow: 3px 3px 0 var(--press-shadow);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background: var(--color-accent-strong);
  color: #fffdf6;
  text-decoration: none;
  transform: translate(1px, 1px);
  box-shadow: 2px 2px 0 var(--press-shadow);
}

.btn-primary:active {
  transform: translate(3px, 3px);
  box-shadow: 0 0 0 var(--press-shadow);
}

.btn-secondary {
  background: var(--color-surface);
  color: var(--color-strong);
  border-color: var(--color-border-strong);
  box-shadow: 2px 2px 0 var(--press-shadow);
}

.btn-secondary:hover,
.btn-secondary:focus-visible {
  border-color: var(--color-accent);
  background: var(--color-accent-soft);
  color: var(--color-accent-strong);
  text-decoration: none;
  transform: translate(1px, 1px);
  box-shadow: 1px 1px 0 var(--press-shadow);
}

.btn-muted {
  background: var(--color-surface-subtle);
  color: var(--color-muted);
  border-color: var(--color-border);
}

.btn-muted:hover,
.btn-muted:focus-visible {
  background: var(--color-surface);
  color: var(--color-strong);
  border-color: var(--color-accent);
  text-decoration: none;
}

.btn-danger {
  background: var(--color-error, #dc3545);
  color: white;
  border-color: var(--color-error, #dc3545);
}

.btn-danger:hover,
.btn-danger:focus-visible {
  background: #9a201a;
  border-color: #9a201a;
  color: white;
  text-decoration: none;
}

.btn-tertiary {
  background: transparent;
  color: var(--color-accent);
  border: none;
  padding-inline: 0.5rem;
  min-height: auto;
}

.btn-tertiary:hover,
.btn-tertiary:focus-visible {
  color: var(--color-accent-strong);
  text-decoration: underline;
}

.btn:disabled,
.btn-primary:disabled,
.btn-secondary:disabled,
.btn-tertiary:disabled,
.btn-muted:disabled,
.btn-danger:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.icon-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.4rem;
  height: 2.4rem;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  background: var(--color-accent-soft);
  color: var(--color-accent);
  font-size: 1.35rem;
  line-height: 1;
  cursor: pointer;
  transition: transform 0.2s ease, border 0.2s ease;
}

.icon-button:hover,
.icon-button:focus {
  transform: translateY(-1px);
  border-color: var(--color-accent);
  text-decoration: none;
}

.helper-text {
  color: var(--color-muted);
  font-size: 0.95rem;
}

.loading {
  text-align: center;
  color: var(--color-muted);
  padding: 2rem 0;
}

.htmx-indicator {
  display: none;
}

.htmx-request .htmx-indicator,
.htmx-request.htmx-indicator {
  display: block;
}

.form-divider {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: 2rem 0;
}

.auth-card {
  width: min(420px, 100%);
  text-align: left;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.auth-card__title {
  margin: 0;
}

.auth-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-stack-md);
}

.auth-form input[type="text"],
.auth-form input[type="password"],
.auth-form input[type="email"] {
  color: var(--color-strong) !important;
  background: var(--color-surface) !important;
}

.form-group,
.form-group-checkbox {
  display: flex;
  flex-direction: column;
  gap: var(--space-stack-xs);
}

.segment {
  position: relative;
  cursor: pointer;
  flex: 1;
  min-width: 0;
}

.segment input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.segment span {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem 1rem;
  border-radius: calc(var(--radius-md) - 0.25rem);
  font-weight: 600;
  font-size: 0.9375rem;
  color: var(--color-muted);
  background: transparent;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  white-space: nowrap;
}

.segment:hover span {
  color: var(--color-strong);
}

.segment input:checked+span {
  background: var(--color-accent);
  color: white;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.08);
}

.segment input:focus-visible+span {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* Start Button */
.btn-start {
  width: 100%;
  padding: 0.875rem 1.5rem;
  background: var(--color-accent);
  color: white;
  border: none;
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.08);
}

.btn-start:hover {
  background: var(--color-accent-strong);
  box-shadow: 0 4px 12px rgba(75, 131, 245, 0.3);
  transform: translateY(-1px);
}

.btn-start:active {
  transform: translateY(0);
}

.btn-start:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* Legacy form styles for other pages */
.form-section {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.form-section label {
  font-weight: 600;
  font-size: 0.95rem;
}

.form-section--inline {
  flex-direction: row;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.form-section--inline>div {
  flex: 1;
}

.form-section--inline .helper-text {
  margin: 0.25rem 0 0 0;
}

.select-compact {
  padding: 0.5rem 2rem 0.5rem 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  min-width: 120px;
}

.settings-card {
  width: min(580px, 100%);
}

.settings-form {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.settings-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 3rem;
  padding: 2rem 0;
  border-bottom: 1px solid var(--color-border);
  align-items: start;
}

.settings-row:first-child {
  padding-top: 0;
}

.settings-row:last-of-type {
  border-bottom: none;
}

.settings-row__info {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.settings-row__info h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin: 0;
  color: var(--color-strong);
}

.settings-row__info p {
  font-size: 0.9rem;
  color: var(--color-muted);
  margin: 0;
  line-height: 1.5;
  max-width: 400px;
}

.settings-row__control {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  align-items: flex-end;
  min-width: 180px;
}

.settings-input {
  width: 100%;
  max-width: 140px;
  padding: 0.65rem 1rem;
  font-size: 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  color: var(--color-strong);
  text-align: center;
}

.settings-input:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-soft);
}

.settings-input:disabled {
  background: var(--color-surface-variant);
  color: var(--color-muted);
  cursor: not-allowed;
}

.settings-input--wide {
  max-width: 220px;
  text-align: left;
}

.settings-row__control--inline {
  flex-direction: row;
  align-items: center;
  gap: 0.5rem;
}

.info-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1rem;
  height: 1rem;
  font-size: 0.65rem;
  font-weight: 700;
  color: var(--color-muted);
  background: var(--color-surface-subtle);
  border: 1px solid var(--color-border);
  border-radius: 50%;
  cursor: help;
  margin-left: 0.35rem;
  vertical-align: middle;
}

.infinity-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  font-size: 1.25rem;
  font-weight: 500;
  color: var(--color-muted);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.15s ease;
}

.infinity-toggle:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.infinity-toggle.is-active {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: white;
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.75rem;
}

.modal-dialog {
  border: none;
  border-radius: var(--radius-lg);
  padding: 0;
  max-width: 400px;
  width: 90%;
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1),
    0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

.modal-dialog::backdrop {
  background: rgba(0, 0, 0, 0.5);
}

.modal-dialog__content {
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.modal-dialog__content h3 {
  margin: 0;
  font-size: 1.3rem;
  font-weight: 600;
}

.modal-dialog__content p {
  margin: 0;
  color: var(--color-muted);
  font-size: 0.95rem;
}

.modal-dialog__actions {
  display: flex;
  gap: 0.75rem;
  justify-content: flex-end;
  margin-top: 0.5rem;
}

/* ========================================
   4-quiz.css
   ======================================== */

/**
 * Quiz - Quiz Select, Questions, Answers, Results, Progress
 */

/* Progress Bar */
.progress-bar {
  width: 100%;
  margin: var(--space-stack-lg) 0;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}


.progress-bar__track {
  position: relative;
  height: 24px;
  background: rgba(15, 118, 110, 0.08);
  border-radius: 999px;
  overflow: hidden;
  border: none;
}


.progress-bar__fill {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  background: linear-gradient(90deg, #10b981 0%, #34d399 100%);
  transition: width 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  border-radius: inherit;
}


.progress-bar__value {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.95rem;
  font-weight: 600;
  color: #ffffff;
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
  pointer-events: none;
}


.progress-bar__count {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-muted);
  text-align: center;
}


.progress-bar__caption {
  margin-top: 0.25rem;
  font-size: 0.8125rem;
  color: var(--color-muted);
  text-align: center;
}


.stat-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.2rem 0.7rem;
  border-radius: 999px;
  font-size: 0.8rem;
  background: var(--color-accent-soft);
  color: var(--color-accent);
  font-weight: 600;
}

.stat-pill.is-due {
  background: rgba(250, 204, 21, 0.18);
  color: #b45309;
}

.stat-pill.is-error {
  background: rgba(239, 68, 68, 0.12);
  color: var(--color-error);
}

.empty-state {
  border-radius: var(--radius-md);
  border: 1px dashed var(--color-border);
  padding: 2rem;
  text-align: center;
  color: var(--color-muted);
}

.empty-icon {
  font-family: var(--font-display);
  font-size: 2rem;
  line-height: 1;
  color: var(--color-border-strong);
  transform: rotate(-12deg);
  margin-bottom: 0.5rem;
}

.mode-indicator {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.95rem;
  color: var(--color-muted);
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--color-border);
}

.mode-label {
  text-transform: uppercase;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--color-strong);
  font-size: 0.8rem;
}

.progress-info {
  color: var(--color-muted);
  font-weight: 500;
}




.question-media {
  display: grid;
  gap: 0.75rem;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}


.question-media__item {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}


.question-media__item img {
  width: 100%;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  object-fit: cover;
}




.finished-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.quiz-maker {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}


.quiz-maker-form {
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
}


.quiz-maker-form textarea {
  min-height: 120px;
  font-size: 1rem;
  line-height: 1.5;
  resize: vertical;
}


.quiz-maker-form select {
  font-size: 1rem;
}


.quiz-maker-controls {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 2rem;
  flex-wrap: wrap;
}


.quiz-maker-controls__left {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  flex: 1;
  min-width: 200px;
}


.quiz-maker-controls__left .form-group {
  max-width: 150px;
}


.quiz-maker-controls__left input[type="number"] {
  width: 100%;
  font-size: 1.1rem;
  padding: 0.65rem 0.85rem;
}


.quiz-maker-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: flex-end;
}


.quiz-maker-output {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}


.quiz-card {
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  padding: 1.5rem;
  background: #f8faff;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}


.quiz-card .meta h2 {
  margin: 0 0 0.4rem;
}


.quiz-card ol {
  margin: 0;
  padding-left: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}


.quiz-card li {
  background: #fff;
  border-radius: var(--radius-sm);
  padding: 0.75rem 1rem;
  border: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}


.quiz-maker-save {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}


.quiz-maker-save-grid {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}


.quiz-save-form {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding: 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: #fff;
}


.quiz-save-form h4 {
  margin: 0;
}


.quiz-save-form--empty {
  background: rgba(37, 99, 235, 0.05);
  border-style: dashed;
  align-items: flex-start;
}


.quiz-maker-success {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  text-align: center;
}


.quiz-maker-success-actions {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}


.quiz-maker-error {
  border-radius: var(--radius-sm);
  border: 1px solid rgba(239, 68, 68, 0.35);
  padding: 0.85rem 1rem;
  background: rgba(239, 68, 68, 0.1);
  color: var(--color-error);
  font-weight: 600;
}


.quiz-select-card {
  width: min(520px, 100%);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-soft);
}


.quiz-select-form {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}


.quiz-controls {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}


.control-group {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.control-label {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-muted);
  text-transform: uppercase;
  letter-spacing: 0.025em;
  margin: 0;
}

/* Deck Selection Header */
.deck-selection-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.5rem;
}

.deck-selection-controls {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
}

.link-button {
  background: none;
  border: none;
  padding: 0;
  color: var(--color-accent);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  text-decoration: none;
  transition: color 0.2s ease;
}

.link-button:hover {
  color: var(--color-accent-strong);
  text-decoration: underline;
}

.deck-count {
  color: var(--color-muted);
  font-size: 0.8125rem;
  margin-left: 0.25rem;
}

/* Deck List */
.deck-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.deck-item {
  display: flex;
  align-items: flex-start;
  gap: 0.875rem;
  padding: 1rem;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.deck-item:hover {
  border-color: var(--color-border-strong);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.deck-checkbox {
  flex-shrink: 0;
  width: 1.25rem;
  height: 1.25rem;
  margin-top: 0.125rem;
  cursor: pointer;
  accent-color: var(--color-accent);
}

.deck-item:has(.deck-checkbox:checked) {
  border-color: var(--color-accent);
  background: var(--color-accent-soft);
  box-shadow: 0 2px 12px rgba(75, 131, 245, 0.15);
}

.deck-item-content {
  flex: 1;
  min-width: 0;
}

.deck-item-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.5rem;
}

.deck-item-name {
  font-size: 0.9375rem;
  font-weight: 600;
  margin: 0;
  color: var(--color-strong);
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.125rem 0.5rem;
  border-radius: var(--radius-pill);
  font-size: 0.75rem;
  font-weight: 600;
  line-height: 1.5;
}

.badge--due {
  background: rgba(251, 146, 60, 0.15);
  color: #c2410c;
}

.deck-item-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 0.625rem;
}

.deck-meta-item {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  font-size: 0.8125rem;
  color: var(--color-muted);
}

.deck-meta-icon {
  flex-shrink: 0;
  opacity: 0.7;
}

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

/* Progress Bar */
.deck-progress {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.deck-progress-bar {
  flex: 1;
  height: 0.375rem;
  background: var(--color-surface-subtle);
  border-radius: var(--radius-pill);
  overflow: hidden;
}

.deck-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-accent) 0%, var(--color-accent-alt) 100%);
  border-radius: var(--radius-pill);
  transition: width 0.3s ease;
}

.deck-progress-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-muted);
  white-space: nowrap;
}

/* Segmented Control */
.segmented-control {
  display: inline-flex;
  background: var(--color-surface-subtle);
  border-radius: var(--radius-md);
  padding: 0.25rem;
  gap: 0.25rem;
}



.progress-card {
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  padding: 1rem 1.25rem;
  background: #f8faff;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}


.progress-label {
  font-weight: 600;
  color: var(--color-muted);
}


.progress-value {
  font-size: 1.1rem;
  font-weight: 600;
}


.progress-card .progress-bar {
  height: 8px;
  border-radius: 999px;
  background: rgba(37, 99, 235, 0.15);
  overflow: hidden;
}


.progress-card .progress-fill {
  height: 100%;
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-strong));
  border-radius: inherit;
}


.difficult-questions {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.difficult-question-item {
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  padding: 1rem 1.2rem;
  background: #fff;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.question-answer {
  color: var(--color-muted);
}


.question-stats {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}



/* Learn mode styles */
.answer-input-form {
  margin-top: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}


.answer-input {
  width: 100%;
  padding: 0.875rem 1rem;
  font-size: 1rem;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  color: var(--color-strong);
  transition: border-color var(--motion-duration-fast) var(--motion-ease);
}


.answer-input:focus {
  outline: none;
  border-color: var(--color-accent);
}


.feedback-header {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.feedback-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 3rem;
  height: 3rem;
  border-radius: 50%;
  font-size: 1.5rem;
}

.feedback-icon--correct {
  background: rgba(48, 164, 108, 0.15);
  color: #30a46c;
}

.feedback-icon--incorrect {
  background: rgba(229, 72, 77, 0.15);
  color: #e5484d;
}

.feedback-title {
  margin: 0;
  font-size: 1.5rem;
  font-weight: 600;
}

.feedback-content {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.answer-comparison {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding: 1rem;
  background: var(--color-surface-subtle);
  border-radius: var(--radius-md);
}


.answer-comparison__item {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}


.answer-comparison__label {
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-muted);
}


.answer-comparison__value {
  font-size: 1rem;
  color: var(--color-strong);
}


.answer-comparison__item--incorrect .answer-comparison__value {
  color: #e5484d;
}


.answer-comparison__item--correct .answer-comparison__value {
  color: #30a46c;
}

/* Keyboard Help Modal */
.keyboard-help-modal {
  backdrop-filter: blur(4px);
}

.keyboard-help-content {
  animation: modalFadeIn 0.2s ease;
}

@keyframes modalFadeIn {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.keyboard-help-content dl {
  margin: 0;
}

.keyboard-help-content dt {
  margin: 0;
}

.keyboard-help-content dd {
  margin: 0;
}


/* ========================================
   5-decks.css
   ======================================== */

/**
 * Decks - Deck Grid, Deck Cards, Deck Management
 */

.chip-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-pill);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-muted);
  font-size: 0.95rem;
  font-weight: 500;
  transition: background var(--motion-duration-fast) var(--motion-ease),
    border-color var(--motion-duration-fast) var(--motion-ease),
    color var(--motion-duration-fast) var(--motion-ease);
}

.chip-link:hover,
.chip-link:focus-visible {
  border-color: var(--color-accent);
  color: var(--color-accent-strong);
  text-decoration: none;
  background: var(--color-accent-soft);
}

label {
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--color-muted);
}

label span[aria-hidden='true'] {
  color: var(--color-accent);
}

input,
textarea,
select {
  font: inherit;
  min-height: 44px;
  padding: 0.6rem 0.85rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-strong);
  transition: border var(--motion-duration-fast) var(--motion-ease),
    box-shadow var(--motion-duration-fast) var(--motion-ease),
    background var(--motion-duration-fast) var(--motion-ease);
}

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

input::placeholder,
textarea::placeholder {
  color: rgba(76, 84, 97, 0.6);
}

input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(75, 131, 245, 0.2);
}

input:disabled,
textarea:disabled,
select:disabled {
  background: var(--color-surface-subtle);
  color: var(--color-muted);
  cursor: not-allowed;
}

small {
  color: var(--color-muted);
  font-size: 0.85rem;
}

.auth-link {
  margin: 0;
  color: var(--color-muted);
}

.deck-tools {
  margin-bottom: 2rem;
}


.deck-tools__collapsible {
  list-style: none;
}


.deck-tools__toggle {
  cursor: pointer;
  user-select: none;
  padding: 1rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}


.deck-tools__toggle:hover {
  background: var(--color-surface-subtle);
}


.deck-tools__toggle .section-title {
  margin: 0;
}


.deck-tools__toggle::before {
  content: "▸";
  font-size: 1.2rem;
  color: var(--color-accent);
  display: inline-block;
  transition: transform 0.2s ease;
  flex-shrink: 0;
}


.deck-tools__collapsible[open] .deck-tools__toggle::before {
  transform: rotate(90deg);
}


.deck-tools__content {
  padding: 1.5rem;
  border-top: 1px solid var(--color-border);
}


.deck-tools__grid {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}


.deck-tools__form {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}


.deck-tools__form input,
.deck-tools__form select {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 0.6rem 0.75rem;
  font-size: 0.95rem;
}


.deck-tools__form button {
  align-self: flex-start;
}


.deck-management {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}


.deck-management__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
}


.deck-management__card h2 {
  margin-top: 0;
}


/* ========================================
   6-stats.css
   ======================================== */

/**
 * Statistics - Stats Views, Activity Bars, Charts
 */

.stats-page {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}


.stats-overview {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1.2rem;
}


.stat-card {
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 1.5rem 1.25rem;
}

.stat-icon {
  font-size: 1.8rem;
}

.stat-value {
  font-size: 1.6rem;
  font-weight: 700;
}

.stat-label {
  color: var(--color-muted);
  font-size: 0.95rem;
}

.stats-sections {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}


.stats-section {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}


.stats-section__header--with-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}


.stats-section__header--with-actions > div {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}


.hardest-drill-form {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1rem;
}


.stat-item {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.stat-item-label {
  color: var(--color-muted);
  font-size: 0.9rem;
}

.activity-chart {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
}


.activity-date {
  color: var(--color-muted);
  font-weight: 500;
}


.activity-bar {
  position: relative;
  height: 34px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-strong));
  display: flex;
  align-items: center;
  justify-content: flex-end;
  padding-right: 0.75rem;
  color: #fff;
  font-weight: 600;
}


.activity-count {
  font-size: 0.9rem;
}


.stats-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 520px;
}


.stats-table th,
.stats-table td {
  padding: 0.75rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}


.stats-table th {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-muted);
}


.stats-table td {
  font-weight: 500;
}

/* Retention forecast */

.forecast-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 0.75rem;
}

.forecast-card {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 0.9rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface-subtle);
}

.forecast-date {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-muted);
}

.forecast-metric {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem;
}

.metric-label {
  font-size: 0.85rem;
  color: var(--color-muted);
}

.metric-value {
  font-size: 1.05rem;
  font-weight: 700;
}

/* Interval heatmap */

.interval-heatmap {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(110px, 1fr));
  gap: 0.75rem;
}

.interval-heatmap__cell {
  --bucket-intensity: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.35rem;
  padding: 1rem 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: color-mix(
    in srgb,
    var(--color-accent) calc(var(--bucket-intensity) * 0.85%),
    var(--color-surface-subtle)
  );
}

.heatmap-label {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-muted);
}

.heatmap-count {
  font-size: 1.3rem;
  font-weight: 700;
}


/* ========================================
   7-spaced-repetition.css
   ======================================== */

/**
 * Spaced Repetition - Learn Mode, Session Stats, Reviews
 */

.session-page {
  display: flex;
  flex-direction: column;
  gap: clamp(1.5rem, 4vw, 2.5rem);
}


.session-page__header {
  display: flex;
  flex-direction: column;
  gap: var(--space-stack-xs);
  align-items: flex-start;
}


.session-page__badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0;
  border-radius: 0;
  border: none;
  background: transparent;
  color: var(--color-muted);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}


.session-page__badge.is-review {
  color: #0f766e;
}


.session-page__badge.is-learn {
  color: #7c3aed;
}


.session-page__title {
  margin: 0;
  font-size: clamp(1.65rem, 3vw, 2.1rem);
  font-weight: 600;
  color: var(--color-strong);
}


.session-page__meta {
  margin: 0;
  color: var(--color-muted);
  font-size: 0.95rem;
}


.session-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-soft);
  padding: clamp(1.75rem, 4vw, 2.5rem);
  min-height: clamp(18rem, 45vh, 26rem);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: flex-start;
}


.session-card .loading {
  font-size: 1rem;
  color: var(--color-muted);
}


/* The card itself: clean warm card stock — no ruling, just generous space. */
.index-card {
  position: relative;
  border: 1px solid var(--color-border-strong);
  border-radius: 14px;
  background-color: var(--color-surface);
  box-shadow: var(--shadow-mid);
}

.qa-card__prompt {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 4vw, 2.75rem);
  font-weight: 600;
  line-height: 1.25;
  color: var(--color-strong);
}

.qa-card__meta {
  font-size: 0.95rem;
  color: var(--color-muted);
}

.qa-card__answer {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.qa-card__answer[hidden] {
  display: none !important;
}

/* A short vermillion tick instead of a full-width rule */
.qa-card__divider {
  height: 3px;
  width: 56px;
  border-radius: 2px;
  background: var(--color-accent);
  opacity: 0.85;
}

.qa-card__answer-value {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3.4vw, 2.25rem);
  font-weight: 600;
  line-height: 1.3;
  color: var(--color-accent-strong);
}

.session-controls {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  gap: clamp(0.75rem, 2vw, 1.25rem);
  align-items: stretch;
}


.session-controls__button {
  --btn-direction: column;
  --btn-align: flex-start;
  --btn-justify: center;
  --btn-gap: 0.3rem;
  --btn-padding-block: clamp(0.85rem, 2.2vw, 1.1rem);
  --btn-padding-inline: clamp(1rem, 2.5vw, 1.35rem);
  --btn-radius: var(--radius-md);
  --btn-min-height: auto;
  --btn-text-align: left;
  width: 100%;
  display: flex;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-strong);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}


.session-controls__button:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}


.session-controls__button:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: var(--shadow-soft);
}


.session-controls__button.is-secondary {
  justify-self: flex-start;
}


.session-controls__button.is-muted {
  justify-self: center;
  --btn-align: center;
  --btn-text-align: center;
}


.session-controls__button.is-primary {
  justify-self: flex-end;
  --btn-align: flex-end;
  --btn-text-align: right;
}


.session-controls__label {
  display: block;
}


.session-controls__hint {
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-muted);
}


.session-controls__button.is-primary .session-controls__hint {
  color: rgba(255, 255, 255, 0.75);
}


.session-controls__button:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}


.session-controls__button:disabled .session-controls__hint {
  color: inherit;
}


.show-answer-section {
  display: flex;
  justify-content: center;
}

.scoreboard {
  display: flex;
  gap: 1.2rem;
  align-items: center;
  justify-content: space-between;
  font-size: 0.95rem;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  background: #f8faff;
  border: 1px solid var(--color-border);
}

.scoreboard .reset {
  border: none;
  background: transparent;
  color: var(--color-accent);
  font-weight: 600;
  cursor: pointer;
}

.finished-screen {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 320px;
}

.finished-content {
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.final-score {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  font-size: 1.25rem;
}

.score-value {
  font-size: 2rem;
  font-weight: 700;
}

.review-summary {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  padding: 1.5rem;
  background: var(--color-surface-subtle);
  border-radius: var(--radius-md);
  margin-bottom: 1rem;
}


.review-summary__original,
.review-summary__current {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  align-items: center;
}


.review-summary__label {
  font-size: 0.9rem;
  text-transform: uppercase;
  color: var(--color-muted);
  font-weight: 600;
  letter-spacing: 0.05em;
}


.review-summary__score {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-strong);
}


.review-summary__current .review-summary__score {
  font-size: 2rem;
}


.review-summary__percentage {
  font-size: 1rem;
  color: var(--color-muted);
}


.finished-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 2rem 1rem;
}

.finished-icon {
  font-family: var(--font-display);
  font-size: 3rem;
  line-height: 1;
  color: var(--color-accent);
  transform: rotate(-12deg);
  margin-bottom: 1rem;
}

.finished-title {
  margin: 0 0 0.75rem 0;
  font-size: 1.75rem;
  font-weight: 600;
}

.finished-message {
  margin: 0 0 2rem 0;
  color: var(--color-muted);
  font-size: 1rem;
  max-width: 32rem;
}


.qa-card--correct {
  border-color: rgba(48, 164, 108, 0.3);
  background: rgba(48, 164, 108, 0.03);
}

.qa-card--incorrect {
  border-color: rgba(229, 72, 77, 0.3);
  background: rgba(229, 72, 77, 0.03);
}

.qa-card--finished {
  border: none;
  background: transparent;
  box-shadow: none;
}

/* Session stats */
.session-stats {
  margin: 0.5rem auto;
  width: 100%;
  max-width: 22rem;
}


.session-stats__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}


.session-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.35rem;
  padding: 1.1rem 1.25rem;
  border-radius: var(--radius-md);
  background: transparent;
  border: 1px solid var(--color-border);
}

.session-stat__value {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 600;
  line-height: 1;
}

.session-stat__label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-muted);
}

.session-stat--success .session-stat__value {
  color: var(--color-success);
}

.session-stat--error .session-stat__value {
  color: var(--color-error);
}


.session-stat__value {
  font-size: 2.5rem;
  font-weight: 700;
  line-height: 1;
  margin-bottom: 0.5rem;
}


.session-stat--success .session-stat__value {
  color: #30a46c;
}


.session-stat--error .session-stat__value {
  color: #e5484d;
}


/* ========================================
   8-responsive.css
   ======================================== */

/**
 * Responsive - All Media Queries
 */

@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --color-bg: #121417;
    --color-surface: #1a1c1e;
    --color-surface-subtle: #202327;
    --color-surface-strong: #2b2f34;
    --color-muted: #c2c7d0;
    --color-strong: #e6e8ea;
    --color-border: #30353b;
    --color-border-strong: #434a52;
    --color-accent-soft: rgba(75, 131, 245, 0.16);
    --shadow-soft: 0 2px 16px rgba(6, 7, 9, 0.6);
    --shadow-mid: 0 12px 28px rgba(6, 7, 9, 0.55);
  }
}

@media (max-width: 640px) {
  .session-card {
    min-height: auto;
    padding: clamp(1.25rem, 4vw, 1.75rem);
  }

  .session-controls {
    grid-template-columns: 1fr;
  }

  .session-controls__button {
    --btn-align: center;
    --btn-text-align: center;
  }

  .session-controls__button.is-secondary,
  .session-controls__button.is-primary {
    justify-self: center;
  }
}

@media (max-width: 768px) {
  .settings-row {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .settings-row__control {
    align-items: flex-start;
  }

  .settings-input {
    max-width: 200px;
  }
}

.sr-main {
  display: flex;
  flex-direction: column;
  gap: clamp(1.25rem, 3vw, 1.75rem);
}

.sr-review-card {
  width: 100%;
}

.sr-aside {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.sr-aside__panel {
  min-height: 100%;
}

.sr-sidebar-placeholder {
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-sm);
  padding: 1.25rem;
  background: rgba(37, 99, 235, 0.06);
  color: var(--color-muted);
}

.sr-summary {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: stretch;
}

.sr-summary__pill {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  padding: 0.65rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  min-width: 140px;
  box-shadow: var(--shadow-soft);
  color: var(--color-strong);
}

.sr-summary__pill.is-due {
  background: rgba(250, 204, 21, 0.18);
  border-color: rgba(250, 204, 21, 0.45);
  color: #92400e;
}

.sr-summary__pill.is-new {
  background: var(--color-accent-soft);
  border-color: rgba(37, 99, 235, 0.35);
  color: var(--color-accent-strong);
}

.sr-summary__label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: currentColor;
  opacity: 0.75;
}

.sr-summary__value {
  font-size: 1.35rem;
  font-weight: 700;
  line-height: 1.1;
}

.sr-summary__meta {
  flex-basis: 100%;
  margin: 0.25rem 0 0;
  font-size: 0.95rem;
  color: var(--color-muted);
}

.sr-summary--inline {
  gap: 0.5rem;
  margin-top: 0.85rem;
}

.sr-summary--inline .sr-summary__pill {
  padding: 0.5rem 0.75rem;
  min-width: 0;
  flex: 1 1 140px;
  box-shadow: none;
}

.sr-summary--inline .sr-summary__label {
  font-size: 0.7rem;
}

.sr-summary--inline .sr-summary__value {
  font-size: 1.15rem;
}

.sr-summary--inline .sr-summary__meta {
  margin-top: 0.15rem;
}

.sr-summary--finished {
  justify-content: center;
  margin-top: 1.25rem;
}

.sr-limit-indicator {
  color: var(--color-accent);
  font-size: 1.1rem;
  margin-left: 0.15rem;
  cursor: help;
}

.sr-limit-explanation-toggle {
  background: none;
  border: none;
  color: var(--color-accent);
  text-decoration: underline;
  cursor: pointer;
  font-size: 0.9rem;
  padding: 0;
  margin-top: 0.25rem;
}

.sr-limit-explanation-toggle:hover {
  color: var(--color-accent-strong);
}

.sr-limit-modal {
  border: none;
  border-radius: var(--radius-md);
  padding: 0;
  max-width: 540px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.15);
}

.sr-limit-modal::backdrop {
  background: rgba(0, 0, 0, 0.5);
}

.sr-limit-modal__content {
  padding: 1.75rem;
}

.sr-limit-modal__content h3 {
  margin: 0 0 1rem;
  color: var(--color-strong);
}

.sr-limit-modal__content p {
  margin: 0.75rem 0;
  line-height: 1.6;
  color: var(--color-strong);
}

.sr-limit-modal__note {
  margin-top: 1.25rem;
  padding: 1rem;
  background: var(--color-accent-soft);
  border-left: 3px solid var(--color-accent);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
}

.sr-limit-modal__content form {
  margin-top: 1.5rem;
  text-align: right;
}

.sr-limit-modal__controls {
  margin-top: 1.5rem;
  padding: 1.25rem;
  background: #f8faff;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
}

.sr-limit-modal__controls h4 {
  margin: 0 0 1rem;
  font-size: 1rem;
  color: var(--color-strong);
}

.sr-limit-adjustment {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.sr-limit-adjustment label {
  font-size: 0.9rem;
  color: var(--color-muted);
  font-weight: 500;
}

.sr-limit-adjustment__inputs {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  align-items: center;
}

.sr-limit-input {
  width: 100px;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-family: inherit;
}


.sr-limit-modal__actions {
  margin-top: 1.5rem;
  display: flex;
  gap: 0.75rem;
  justify-content: flex-end;
}

@media (min-width: 960px) {
  .sr-layout {
    grid-template-columns: minmax(0, 1fr) minmax(260px, 320px);
    align-items: flex-start;
  }
}


.sr-sidebar {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.sr-sidebar__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.sr-sidebar__list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  list-style: none;
  padding: 0;
  margin: 0;
}

.sr-sidebar__item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 1rem 1.25rem;
  background: #fff;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.sr-sidebar__item-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.sr-sidebar__badge {
  border-radius: 999px;
  padding: 0.25rem 0.75rem;
  background: var(--color-accent-soft);
  color: var(--color-accent);
  font-weight: 600;
  font-size: 0.8rem;
}

.sr-sidebar__badge.is-due {
  background: rgba(250, 204, 21, 0.18);
  color: #b45309;
}

.sr-sidebar__metrics {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  color: var(--color-muted);
  font-size: 0.9rem;
}

.sr-sidebar__metric strong {
  color: var(--color-strong);
}

.sr-sidebar__empty {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  align-items: center;
  text-align: center;
  color: var(--color-muted);
}

.error-card {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  text-align: center;
}

.error-card h2 {
  margin: 0;
}

.error-card .reset {
  align-self: center;
  padding: 0.55rem 1.35rem;
  border-radius: 999px;
  border: none;
  background: var(--color-accent);
  color: #fff;
  font-weight: 600;
  cursor: pointer;
}

.site-footer {
  border-top: 1px solid var(--color-border);
  background: var(--color-surface);
  padding-block: clamp(var(--space-stack-lg), 4vw, var(--space-stack-xl));
}

.site-footer__inner {
  display: flex;
  flex-direction: column;
  gap: var(--space-stack-md);
  color: var(--color-muted);
  font-size: 0.95rem;
}

.site-footer__title {
  display: block;
  font-weight: 600;
  color: var(--color-strong);
}

.site-footer__tagline {
  margin: 0.25rem 0 0;
  color: var(--color-muted);
  max-width: 48ch;
}

.site-footer__meta {
  display: grid;
  gap: 0.35rem;
  font-size: 0.9rem;
}

@media (min-width: 768px) {
  .site-footer__inner {
    flex-direction: row;
    justify-content: space-between;
    align-items: flex-start;
  }

  .site-footer__meta {
    text-align: right;
  }
}


@media (max-width: 960px) {
  .quiz-maker-controls {
    flex-direction: column;
    align-items: stretch;
  }

  .quiz-maker-controls__left {
    width: 100%;
  }

  .btn-large {
    width: 100%;
  }
}


@media (max-width: 640px) {
  .topbar {
    grid-template-columns: 1fr;
    justify-items: center;
    gap: 1rem;
  }

  .topbar__brand {
    justify-self: center;
  }

  .topbar__nav {
    width: 100%;
    justify-content: center;
  }

  .page-header {
    justify-content: center;
    text-align: center;
  }

  .page-header__actions {
    justify-content: center;
  }

  .card {
    padding: 1.25rem;
  }

  .mode-indicator {
    flex-direction: column;
    gap: 0.5rem;
    align-items: flex-start;
  }

  .activity-bar-container {
    grid-template-columns: 1fr;
    gap: 0.5rem;
  }

  .stats-sections {
    grid-template-columns: 1fr;
  }

  /* Quiz Select Mobile Styles */
  .quiz-select-container {
    padding: 0 0.75rem;
  }

  .quiz-select-card {
    padding: 1.5rem;
  }

  .quiz-select-form {
    gap: 1.5rem;
  }

  .quiz-controls {
    gap: 1.25rem;
  }

  .control-group {
    gap: 0.625rem;
  }

  .segmented-control {
    width: 100%;
  }

  .segment span {
    padding: 0.5rem 0.75rem;
    font-size: 0.875rem;
  }

  .btn-start {
    padding: 0.75rem 1.25rem;
    font-size: 0.9375rem;
  }

  /* Deck selection mobile styles */
  .deck-selection-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
  }

  .deck-selection-controls {
    flex-wrap: wrap;
  }

  .deck-item {
    padding: 0.875rem;
    gap: 0.75rem;
  }

  .deck-item-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.375rem;
  }

  .deck-item-meta {
    gap: 0.75rem;
  }

  .deck-meta-item {
    font-size: 0.75rem;
  }

  .deck-progress {
    flex-direction: column;
    align-items: stretch;
    gap: 0.5rem;
  }

  .deck-progress-bar {
    order: 2;
  }

  .deck-progress-label {
    order: 1;
    text-align: left;
  }
}