/* ==========================================================================
   MindChamp -- Main Stylesheet
   A clean, minimal design: grey-scale surfaces, black text, system fonts.
   Mobile-first, responsive.
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. CSS Custom Properties
   -------------------------------------------------------------------------- */
:root {
  /* Grey scale */
  --grey-50: #f7f7f7;
  --grey-100: #ededed;
  --grey-150: #e3e3e3;
  --grey-200: #d6d6d6;
  --grey-300: #bdbdbd;
  --grey-400: #949494;
  --grey-500: #6b6b6b;
  --grey-600: #525252;
  --grey-700: #3a3a3a;
  --grey-800: #2c2c2c;
  --grey-900: #141414;

  /* Surfaces & layout */
  --color-bg: var(--grey-50);
  --color-surface: #ffffff;
  --color-surface-muted: var(--grey-100);
  --color-surface-subtle: var(--grey-150);
  --color-text: var(--grey-900);
  --color-text-muted: var(--grey-500);
  --color-text-secondary: var(--grey-600);
  --color-card-bg: var(--color-surface);
  --color-border: var(--grey-200);
  --color-border-strong: var(--grey-300);
  --color-sidebar-bg: var(--grey-100);
  --color-sidebar-border: var(--grey-200);
  --color-header-bg: var(--color-surface);
  --color-timer-bg: var(--grey-100);
  --color-placeholder: var(--grey-400);

  /* Buttons — three grey tiers + danger */
  --color-btn-primary: var(--grey-800);
  --color-btn-primary-hover: var(--grey-700);
  --color-btn-primary-active: var(--grey-900);
  --color-btn-primary-text: #ffffff;
  --color-btn-secondary-bg: var(--grey-150);
  --color-btn-secondary-hover: var(--grey-200);
  --color-btn-secondary-text: var(--grey-700);
  --color-btn-secondary-border: var(--grey-300);
  --color-btn-ghost-bg: var(--grey-100);
  --color-btn-ghost-hover: var(--grey-150);
  --color-btn-ghost-text: var(--grey-600);
  --color-btn-ghost-border: var(--grey-300);

  /* Legacy aliases (used across components) */
  --color-primary: var(--color-btn-primary);
  --color-primary-hover: var(--color-btn-primary-hover);

  /* Input */
  --color-input-bg: var(--color-surface);
  --color-input-border: var(--grey-300);
  --color-input-focus: var(--grey-600);

  /* Status (unchanged accents) */
  --color-correct: #2e7d32;
  --color-wrong: #c62828;
  --color-timer-normal: var(--grey-700);
  --color-timer-warning: #e65100;
  --color-timer-track: var(--grey-200);
  --color-passed-border: #4caf50;
  --color-overlay: rgba(20, 20, 20, 0.45);

  /* Practice actions */
  --color-btn-submit-bg: #e8f5e9;
  --color-btn-submit-hover: #c8e6c9;
  --color-btn-submit-active: #a5d6a7;
  --color-btn-submit-border: #81c784;
  --color-btn-submit-text: #2e7d32;
  --color-btn-skip-bg: #ffebee;
  --color-btn-skip-hover: #ffcdd2;
  --color-btn-skip-active: #ef9a9a;
  --color-btn-skip-border: #ef9a9a;
  --color-btn-skip-text: #c62828;

  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-size-base: 16px;
  --font-size-sm: 14px;
  --font-size-xs: 12px;
  --font-size-lg: 20px;
  --font-size-xl: 24px;
  --font-size-2xl: 32px;
  --font-size-3xl: 40px;

  /* Spacing */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-2xl: 48px;

  /* Layout */
  --sidebar-width: 260px;
  --mobile-header-height: 56px;
  --mobile-header-offset: 56px;
  --timer-bar-height: 56px;
  --touch-target: 44px;
  --border-radius: 8px;
  --border-radius-sm: 4px;
  --border-radius-lg: 12px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
}


/* --------------------------------------------------------------------------
   2. Reset & Base Styles
   -------------------------------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: var(--font-size-base);
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-family);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.5;
  min-height: 100vh;
  min-height: 100dvh;
  -webkit-tap-highlight-color: transparent;
  overscroll-behavior-y: none;
  overflow-x: hidden;
}

body.sidebar-open {
  overflow: hidden;
  touch-action: none;
}

body.onboarding-open {
  overflow: hidden;
}

body.onboarding-open .main-content {
  padding-top: calc(var(--spacing-md) + env(safe-area-inset-top, 0px));
}

a {
  color: var(--color-text);
  text-decoration: none;
}

button {
  font-family: inherit;
  font-size: inherit;
  cursor: pointer;
  border: none;
  background: none;
  touch-action: manipulation;
}

input {
  font-family: inherit;
  font-size: inherit;
}

ul, ol {
  list-style: none;
}

img {
  max-width: 100%;
  display: block;
}


/* --------------------------------------------------------------------------
   3. Layout -- Mobile header + Sidebar + Main Content
   Mobile-first: full-width content with fixed top bar; sidebar is a drawer.
   Tablet/desktop: persistent sidebar, no mobile header.
   -------------------------------------------------------------------------- */

.main-content {
  width: 100%;
  min-height: 100vh;
  min-height: 100dvh;
  padding:
    calc(var(--mobile-header-offset) + env(safe-area-inset-top, 0px) + var(--spacing-md))
    var(--spacing-md)
    calc(var(--spacing-lg) + env(safe-area-inset-bottom, 0px));
}

/* Practice screen: fill viewport so the question panel gets real height */
.main-content:has(#screen-practice.active) {
  display: flex;
  flex-direction: column;
  box-sizing: border-box;
  overflow: hidden;
}

.main-content.swipe-back--active {
  will-change: transform;
  transition: transform var(--transition-fast);
  transform: translateX(var(--swipe-offset, 0));
}

@media (prefers-reduced-motion: reduce) {
  .main-content.swipe-back--active {
    transition: none;
    transform: none;
  }
}

/* -- Mobile / tablet top bar ------------------------------------------------ */
.mobile-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  box-sizing: border-box;
  min-height: calc(var(--mobile-header-height) + env(safe-area-inset-top, 0px));
  padding:
    calc(env(safe-area-inset-top, 0px) + var(--spacing-xs))
    calc(var(--spacing-md) + env(safe-area-inset-right, 0px))
    var(--spacing-xs)
    calc(var(--spacing-md) + env(safe-area-inset-left, 0px));
  background-color: var(--color-header-bg);
  border-bottom: 1px solid var(--color-border-strong);
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.04);
}

body.onboarding-open .mobile-header {
  display: none;
}

.mobile-header__menu,
.mobile-header__back {
  flex-shrink: 0;
  width: var(--touch-target);
  height: var(--touch-target);
  min-width: var(--touch-target);
  min-height: var(--touch-target);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--border-radius-sm);
  color: var(--color-text);
  background-color: var(--color-btn-ghost-bg);
  border: 1px solid var(--color-border);
  transition: background-color var(--transition-fast), border-color var(--transition-fast);
}

.mobile-header__menu:active,
.mobile-header__back:active {
  background-color: var(--color-btn-ghost-hover);
  border-color: var(--color-border-strong);
}

.mobile-header__back {
  font-size: var(--font-size-xl);
  font-weight: 600;
}

.mobile-header__titles {
  flex: 1;
  min-width: 0;
}

.mobile-header__title {
  font-size: var(--font-size-base);
  font-weight: 700;
  line-height: 1.25;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.mobile-header__subtitle {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  line-height: 1.3;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.mobile-header__badge {
  flex-shrink: 0;
  font-size: var(--font-size-xs);
  font-weight: 600;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: 999px;
  background-color: var(--color-surface-muted);
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  font-variant-numeric: tabular-nums;
}

@media (min-width: 1024px) {
  .mobile-header {
    display: none;
  }

  .main-content {
    box-sizing: border-box;
    margin-left: var(--sidebar-width);
    width: calc(100% - var(--sidebar-width));
    max-width: calc(100vw - var(--sidebar-width));
    padding:
      var(--spacing-xl)
      var(--spacing-2xl)
      var(--spacing-2xl);
  }
}


/* --------------------------------------------------------------------------
   4. Sidebar
   -------------------------------------------------------------------------- */

.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: min(var(--sidebar-width), 85vw);
  max-width: 320px;
  height: 100vh;
  height: 100dvh;
  background-color: var(--color-sidebar-bg);
  border-right: 1px solid var(--color-sidebar-border);
  display: flex;
  flex-direction: column;
  z-index: 300;
  overflow-y: auto;
  overscroll-behavior: contain;
  -webkit-overflow-scrolling: touch;
  transition: transform var(--transition-normal);
  padding-top: env(safe-area-inset-top);
  padding-bottom: env(safe-area-inset-bottom);
  transform: translateX(-100%);
}

.sidebar.sidebar--open {
  transform: translateX(0);
  box-shadow: 4px 0 24px rgba(0, 0, 0, 0.12);
}

@media (min-width: 1024px) {
  .sidebar {
    width: var(--sidebar-width);
    max-width: none;
    transform: none;
    box-shadow: none;
  }
}

/* -- Sidebar header: app name ------------------------------------------- */
.sidebar__header {
  padding: var(--spacing-lg) var(--spacing-md);
  border-bottom: 1px solid var(--color-border);
  background-color: var(--color-surface-subtle);
}

.sidebar__app-name {
  display: block;
  width: 100%;
  padding: 0;
  border: none;
  background: none;
  font-family: inherit;
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-text);
  text-align: left;
  cursor: pointer;
  border-radius: var(--border-radius-sm);
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

@media (min-width: 1024px) {
  .sidebar__app-name:hover {
    color: var(--grey-700);
  }
}

.sidebar__app-name:active {
  background-color: var(--color-surface-muted);
}

/* -- Sidebar navigation context ----------------------------------------- */
.sidebar__nav {
  flex: 1;
  padding: var(--spacing-md);
}

.sidebar__nav-item {
  padding: var(--spacing-sm) var(--spacing-md);
  margin-bottom: var(--spacing-xs);
  border-radius: var(--border-radius-sm);
  transition: background-color var(--transition-fast);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--spacing-xs);
}

.sidebar__nav-item:hover {
  background-color: var(--color-surface-subtle);
}

.sidebar__nav-item--active {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
}

.sidebar__nav-label {
  font-size: var(--font-size-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
  line-height: 1.2;
}

.sidebar__nav-value {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text);
  line-height: 1.35;
  word-wrap: break-word;
  overflow-wrap: break-word;
}

/* -- Sidebar progress list ----------------------------------------------- */
.sidebar__progress {
  padding: var(--spacing-md);
  border-top: 1px solid var(--color-border);
  background-color: var(--color-surface-muted);
}

.sidebar__progress-title {
  font-size: var(--font-size-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-sm);
}

.sidebar__ps-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.sidebar__ps-item {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-xs);
  font-size: var(--font-size-sm);
  line-height: 1.35;
  border-radius: var(--border-radius-sm);
}

.sidebar__ps-item.current {
  font-weight: 600;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
}

.sidebar__ps-icon {
  flex-shrink: 0;
  width: 1.2em;
  text-align: center;
  line-height: 1.35;
  margin-top: 1px;
}

.sidebar__ps-item.ps-passed .sidebar__ps-icon { color: var(--color-correct); }
.sidebar__ps-item.ps-active .sidebar__ps-icon { color: var(--color-text); }
.sidebar__ps-item.ps-attempted .sidebar__ps-icon { color: var(--color-text-muted); }
.sidebar__ps-item.ps-not-started .sidebar__ps-icon { color: var(--color-text-muted); }

.sidebar__ps-name {
  flex: 1;
  min-width: 0;
  line-height: 1.35;
}

.sidebar__ps-score {
  color: var(--color-text-muted);
  font-size: var(--font-size-xs);
}

/* -- Sidebar actions (bottom) ------------------------------------------- */
.sidebar__actions {
  padding: var(--spacing-md);
  border-top: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background-color: var(--color-surface);
}

.sidebar__reset-btn {
  background-color: var(--color-btn-ghost-bg);
  border: 1px solid var(--color-border);
  cursor: pointer;
  font-size: var(--font-size-xl);
  color: var(--color-text-secondary);
  padding: var(--spacing-sm);
  min-width: 44px;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--border-radius-sm);
  transition: background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
}

.sidebar__reset-btn:active {
  background-color: var(--color-btn-ghost-hover);
}

@media (min-width: 1024px) {
  .sidebar__reset-btn:hover {
    color: var(--color-wrong);
    background-color: #ffebee;
    border-color: #ef9a9a;
  }
}

/* -- Sidebar footer: back button ---------------------------------------- */
.sidebar__footer {
  padding: var(--spacing-md);
  border-top: 1px solid var(--color-border);
}

.sidebar__back-btn {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  width: 100%;
  padding: var(--spacing-md);
  border-radius: var(--border-radius-sm);
  font-size: var(--font-size-base);
  color: var(--color-text-muted);
  min-height: var(--touch-target);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

@media (min-width: 1024px) {
  .sidebar__back-btn:hover {
    background-color: var(--color-surface-subtle);
    color: var(--color-text);
  }
}

/* Hide duplicate back in drawer — mobile header back is primary */
@media (max-width: 1023px) {
  .sidebar__back-btn {
    display: none;
  }
}


/* --------------------------------------------------------------------------
   5. Hamburger Menu (inside mobile header)
   -------------------------------------------------------------------------- */

.hamburger {
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  padding: 0;
  border: none;
  background: none;
}

.hamburger__bar {
  display: block;
  width: 20px;
  height: 2px;
  background-color: var(--color-text);
  border-radius: 1px;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.hamburger--open .hamburger__bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.hamburger--open .hamburger__bar:nth-child(2) {
  opacity: 0;
}

.hamburger--open .hamburger__bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Sidebar backdrop overlay */
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background-color: var(--color-overlay);
  z-index: 250;
  -webkit-tap-highlight-color: transparent;
}

.sidebar-overlay--visible {
  display: block;
}

@media (min-width: 1024px) {
  .sidebar-overlay {
    display: none !important;
  }
}


/* --------------------------------------------------------------------------
   6. Screen Containers
   -------------------------------------------------------------------------- */

/* Each screen section is hidden by default, shown when .active */
.screen {
  display: none;
  opacity: 0;
  transition: opacity var(--transition-normal);
  width: 100%;
  min-height: calc(100dvh - var(--mobile-header-height) - var(--spacing-2xl));
  position: relative;
}

.screen.active {
  display: block;
  opacity: 1;
}

.screen__title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
  line-height: 1.2;
}

/* Title lives in mobile header on small screens */
@media (max-width: 1023px) {
  .screen__title {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
  }
}

@media (min-width: 1024px) {
  .screen__title {
    font-size: var(--font-size-3xl);
    margin-bottom: var(--spacing-md);
    position: static;
    width: auto;
    height: auto;
    padding: 0;
    overflow: visible;
    clip: auto;
    white-space: normal;
    border: none;
  }
}

.screen__subtitle {
  font-size: var(--font-size-base);
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-lg);
}


/* --------------------------------------------------------------------------
   7. Card Grid -- Grades, Levels, Practice Sets
   -------------------------------------------------------------------------- */

.card-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-md);
}

@media (min-width: 600px) {
  .card-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
  }
}

@media (min-width: 1024px) {
  .card-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* -- Individual card ---------------------------------------------------- */
.card {
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-lg);
  cursor: pointer;
  transition: box-shadow var(--transition-fast), transform var(--transition-fast),
              border-color var(--transition-fast), background-color var(--transition-fast);
  min-height: 88px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  -webkit-user-select: none;
  user-select: none;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.04);
}

@media (min-width: 1024px) {
  .card {
    padding: var(--spacing-xl) var(--spacing-lg);
    min-height: 120px;
  }

  .card:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    transform: translateY(-1px);
    border-color: var(--grey-300);
    background-color: var(--color-surface);
  }
}

.card:active {
  transform: scale(0.98);
  background-color: var(--color-surface-muted);
  border-color: var(--grey-300);
}

.card__title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
}

@media (min-width: 1024px) {
  .card__title {
    font-size: var(--font-size-lg);
  }
}

.card__description {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-sm);
}

.card__meta {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

/* -- Locked card -------------------------------------------------------- */
.card--locked {
  opacity: 0.5;
  filter: grayscale(100%);
  pointer-events: none;
  cursor: default;
}

.card--locked:hover {
  box-shadow: none;
  transform: none;
  border-color: var(--color-border);
}

/* -- Passed card: subtle green left border ------------------------------ */
.card--passed {
  border-left: 4px solid var(--color-passed-border);
  background-color: var(--color-surface);
}

/* -- Card badge (score, status, etc.) ----------------------------------- */
.card__badge {
  display: inline-block;
  font-size: var(--font-size-xs);
  font-weight: 600;
  padding: 2px var(--spacing-sm);
  border-radius: 12px;
  margin-top: var(--spacing-sm);
}

.card__badge--passed {
  background-color: #e8f5e9;
  color: var(--color-correct);
}

.card__badge--attempted {
  background-color: #fff3e0;
  color: #e65100;
}

.card__badge--locked {
  background-color: var(--color-surface-muted);
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
}


/* --------------------------------------------------------------------------
   8. Practice Session
   -------------------------------------------------------------------------- */

/* -- Timer bar: sticky below mobile header on small screens -------------- */
#screen-practice.active {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: 0;
}

.timer-bar {
  position: sticky;
  top: calc(var(--mobile-header-offset) + env(safe-area-inset-top, 0px));
  z-index: 50;
  background-color: var(--color-timer-bg);
  padding: var(--spacing-sm) var(--spacing-md) var(--spacing-md);
  margin-bottom: var(--spacing-md);
  border-bottom: 1px solid var(--color-border-strong);
  flex-shrink: 0;
  border-radius: var(--border-radius-lg);
}

@media (min-width: 1024px) {
  .timer-bar {
    top: 0;
    margin: 0 0 var(--spacing-lg);
    padding-left: 0;
    padding-right: 0;
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--color-border);
  }
}

.timer-bar__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-sm);
}

.timer-bar__countdown {
  font-size: var(--font-size-lg);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  min-width: 3ch;
  text-align: right;
}

.timer-bar__countdown--warning {
  color: var(--color-timer-warning);
}

.timer-bar__question-count {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

/* Progress bar track */
.timer-bar__track {
  width: 100%;
  height: 8px;
  background-color: var(--color-timer-track);
  border-radius: 4px;
  overflow: hidden;
}

/* Progress bar fill -- width set via inline style */
.timer-bar__fill {
  height: 100%;
  background-color: var(--color-timer-normal);
  border-radius: 3px;
  transition: width 1s linear;
}

.timer-bar__fill--warning {
  background-color: var(--color-timer-warning);
}

/* -- Question area ------------------------------------------------------ */
.question-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 0;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

.question {
  max-width: 800px;
  width: 100%;
  margin: 0 auto;
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  gap: var(--spacing-md);
  min-height: 0;
}

/* Question prompt panel — grows to fill space above the answer box */
.question__prompt {
  flex: 1 1 auto;
  min-height: 12rem;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
  padding: var(--spacing-lg) var(--spacing-md);
  text-align: center;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

.question__text {
  width: 100%;
  font-size: clamp(1.125rem, 4vw, 2rem);
  font-weight: 600;
  line-height: 1.4;
  overflow-wrap: break-word;
  word-wrap: break-word;
  hyphens: auto;
  margin-top: auto;
  margin-bottom: auto;
}

/* Answer panel — compact, fixed to natural height */
.question__answer {
  flex: 0 0 auto;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
  padding: var(--spacing-md) var(--spacing-md);
  text-align: center;
}

@media (min-width: 1024px) {
  .question {
    gap: var(--spacing-lg);
  }

  .question__prompt {
    padding: var(--spacing-xl) var(--spacing-lg);
  }

  .question__answer {
    padding: var(--spacing-lg) var(--spacing-lg);
  }
}

/* -- Answer input ------------------------------------------------------- */
.question__input-wrapper {
  margin-bottom: var(--spacing-md);
}

.question__input {
  width: 100%;
  max-width: 400px;
  padding: var(--spacing-md) var(--spacing-lg);
  font-size: var(--font-size-xl);
  text-align: center;
  border: 2px solid var(--color-input-border);
  border-radius: var(--border-radius-lg);
  background-color: var(--color-input-bg);
  color: var(--color-text);
  outline: none;
  transition: border-color var(--transition-fast), background-color var(--transition-fast);
  min-height: var(--touch-target);
  /* Prevent iOS zoom on focus */
  font-size: max(16px, var(--font-size-xl));
}

.question__input:focus {
  border-color: var(--color-input-focus);
  background-color: var(--color-surface);
}

.question__input::placeholder {
  color: var(--color-placeholder);
}

.question__input-hint {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  margin-top: var(--spacing-xs);
}

/* -- Submit & Skip actions ---------------------------------------------- */
.question__actions {
  display: flex;
  flex-direction: column-reverse;
  gap: var(--spacing-sm);
  max-width: 400px;
  width: 100%;
  margin: 0 auto;
  padding-top: var(--spacing-sm);
}

@media (min-width: 480px) {
  .question__actions {
    flex-direction: row;
    justify-content: space-between;
    align-items: stretch;
    max-width: 500px;
  }
}

.btn-submit {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--color-btn-submit-text);
  background-color: var(--color-btn-submit-bg);
  border: 1px solid var(--color-btn-submit-border);
  border-radius: var(--border-radius-lg);
  transition: background-color var(--transition-fast), transform var(--transition-fast),
              border-color var(--transition-fast);
  min-width: 120px;
  min-height: 52px;
  width: 100%;
}

@media (min-width: 480px) {
  .btn-submit {
    width: auto;
    min-height: 48px;
  }
}

.btn-submit:active:not(:disabled) {
  transform: scale(0.98);
  background-color: var(--color-btn-submit-active);
  border-color: var(--color-btn-submit-border);
}

@media (min-width: 1024px) {
  .btn-submit:hover:not(:disabled) {
    background-color: var(--color-btn-submit-hover);
    border-color: var(--color-btn-submit-border);
  }
}

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

.btn-skip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--color-btn-skip-text);
  padding: var(--spacing-md) var(--spacing-xl);
  background-color: var(--color-btn-skip-bg);
  border: 1px solid var(--color-btn-skip-border);
  border-radius: var(--border-radius-lg);
  min-width: 120px;
  min-height: 48px;
  width: 100%;
  transition: color var(--transition-fast), border-color var(--transition-fast),
              background-color var(--transition-fast);
}

@media (min-width: 480px) {
  .btn-skip {
    width: auto;
  }
}

@media (min-width: 1024px) {
  .btn-skip:hover {
    color: var(--color-btn-skip-text);
    border-color: var(--color-btn-skip-active);
    background-color: var(--color-btn-skip-hover);
  }
}

.btn-skip:active {
  background-color: var(--color-btn-skip-active);
  border-color: var(--color-btn-skip-active);
}


/* -- Compact landscape layout (practice screen, mobile / tablet only) ---- */
@media (orientation: landscape) and (max-height: 520px) and (max-width: 1023px) {
  .main-content:has(#screen-practice.active) {
    padding-top: calc(var(--mobile-header-height) + env(safe-area-inset-top, 0px) + var(--spacing-xs));
    padding-bottom: calc(var(--spacing-xs) + env(safe-area-inset-bottom, 0px));
  }

  #screen-practice.active {
    flex-direction: row;
    align-items: stretch;
    gap: var(--spacing-sm);
    min-height: 0;
  }

  #screen-practice.active .timer-bar {
    position: static;
    top: auto;
    width: min(132px, 28vw);
    flex-shrink: 0;
    margin: 0;
    padding: var(--spacing-md) var(--spacing-sm);
    border-bottom: none;
    border-right: 1px solid var(--color-border-strong);
    border-radius: var(--border-radius-lg);
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: var(--spacing-sm);
  }

  #screen-practice.active .timer-bar__header {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-xs);
    margin-bottom: 0;
    width: 100%;
  }

  #screen-practice.active .timer-bar__countdown {
    font-size: var(--font-size-xl);
    font-weight: 700;
    line-height: 1;
    letter-spacing: -0.02em;
  }

  #screen-practice.active .timer-bar__question-count {
    font-size: var(--font-size-xs);
    font-weight: 600;
    color: var(--color-text-secondary);
    line-height: 1.35;
  }

  #screen-practice.active .timer-bar__track {
    height: 6px;
    width: 100%;
  }

  #screen-practice.active .question-area {
    min-width: 0;
    flex: 1;
    min-height: 0;
  }

  #screen-practice.active .question {
    flex: 1;
    flex-direction: column;
    align-items: stretch;
    gap: var(--spacing-sm);
    min-height: 0;
  }

  #screen-practice.active .question__prompt {
    flex: 1 1 auto;
    min-width: 0;
    min-height: 0;
    padding: var(--spacing-md);
    justify-content: center;
    text-align: center;
    box-shadow: none;
  }

  #screen-practice.active .question__answer {
    flex: 0 0 auto;
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    box-shadow: none;
  }

  #screen-practice.active .question__text {
    margin-bottom: 0;
  }

  #screen-practice.active .question__input-wrapper {
    margin-bottom: 0;
    flex: 1 1 160px;
    min-width: 120px;
    max-width: 280px;
  }

  #screen-practice.active .question__input {
    max-width: none;
    padding: var(--spacing-sm) var(--spacing-md);
    min-height: 40px;
    font-size: max(16px, var(--font-size-base));
  }

  #screen-practice.active .question__actions {
    flex-direction: row;
    width: auto;
    max-width: none;
    padding-top: 0;
    gap: var(--spacing-xs);
    margin: 0;
    flex: 0 0 auto;
  }

  #screen-practice.active .btn-submit,
  #screen-practice.active .btn-skip {
    min-height: 40px;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-sm);
    width: 100%;
  }

  .mobile-header__subtitle {
    display: none;
  }
}

@media (orientation: landscape) and (max-height: 520px) and (min-width: 1024px) {
  #screen-practice.active .timer-bar {
    width: 180px;
  }
}


/* --------------------------------------------------------------------------
   9. Results Screen
   -------------------------------------------------------------------------- */

.results {
  max-width: 900px;
  margin: 0 auto;
}

.results__summary {
  text-align: center;
  margin-bottom: var(--spacing-lg);
  padding: var(--spacing-lg);
  background-color: var(--color-surface);
  border-radius: var(--border-radius-lg);
  border: 1px solid var(--color-border-strong);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

@media (min-width: 1024px) {
  .results__summary {
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-xl);
  }
}

.results__score {
  font-size: clamp(2rem, 10vw, var(--font-size-3xl));
  font-weight: 700;
  margin-bottom: var(--spacing-xs);
}

.results__score--passed {
  color: var(--color-correct);
}

.results__score--failed {
  color: var(--color-wrong);
}

.results__label {
  font-size: var(--font-size-base);
  color: var(--color-text-muted);
}

/* -- Question result list ----------------------------------------------- */
.results__list {
  margin-bottom: var(--spacing-xl);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
}

.results__item {
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-rows: auto auto;
  gap: var(--spacing-xs) var(--spacing-sm);
  padding: var(--spacing-md);
  border-bottom: 1px solid var(--color-border);
  align-items: start;
  background-color: var(--color-surface);
}

.results__item:nth-child(even) {
  background-color: var(--color-surface-muted);
}

@media (min-width: 600px) {
  .results__item {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--spacing-md);
  }
}

.results__item:last-child {
  border-bottom: none;
}

.results__icon {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-lg);
  line-height: 1;
}

/* Correct */
.results__icon--correct {
  color: var(--color-correct);
}

/* Wrong */
.results__icon--wrong {
  color: var(--color-wrong);
}

/* Skipped */
.results__icon--skipped {
  color: var(--color-text-muted);
}

/* Timed out */
.results__icon--timeout {
  color: var(--color-timer-warning);
}

.results__question-text {
  flex: 1;
  min-width: 0;
  font-size: var(--font-size-base);
  word-wrap: break-word;
  overflow-wrap: break-word;
}

.results__solution {
  flex-basis: 100%;
  margin-top: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  background-color: var(--color-surface-subtle);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-sm);
}

.results__solution-explanation {
  margin-top: var(--spacing-xs);
  line-height: 1.5;
}

.results__user-answer {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  grid-column: 2;
}

@media (min-width: 600px) {
  .results__user-answer {
    grid-column: auto;
  }
}

/* -- Results action buttons --------------------------------------------- */
.results__actions {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

@media (min-width: 600px) {
  .results__actions {
    flex-direction: row;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    justify-content: center;
  }
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--color-btn-primary-text);
  background-color: var(--color-btn-primary);
  border: 1px solid var(--color-btn-primary);
  border-radius: var(--border-radius-lg);
  transition: background-color var(--transition-fast), transform var(--transition-fast),
              border-color var(--transition-fast);
  min-height: 52px;
  width: 100%;
}

@media (min-width: 600px) {
  .btn-primary {
    min-height: 48px;
    min-width: 140px;
    width: auto;
  }
}

@media (min-width: 1024px) {
  .btn-primary:hover {
    background-color: var(--color-btn-primary-hover);
    border-color: var(--color-btn-primary-hover);
  }
}

.btn-primary:active {
  transform: scale(0.98);
  background-color: var(--color-btn-primary-active);
  border-color: var(--color-btn-primary-active);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--color-btn-secondary-text);
  background-color: var(--color-btn-secondary-bg);
  border: 1px solid var(--color-btn-secondary-border);
  border-radius: var(--border-radius-lg);
  transition: background-color var(--transition-fast), border-color var(--transition-fast),
              transform var(--transition-fast);
  min-height: 52px;
  width: 100%;
}

@media (min-width: 600px) {
  .btn-secondary {
    min-height: 48px;
    min-width: 140px;
    width: auto;
  }
}

@media (min-width: 1024px) {
  .btn-secondary:hover {
    background-color: var(--color-btn-secondary-hover);
    border-color: var(--grey-400);
  }
}

.btn-secondary:active {
  transform: scale(0.98);
  background-color: var(--color-btn-secondary-hover);
  border-color: var(--color-border-strong);
}

.btn-link {
  display: inline-flex;
  align-items: center;
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

.btn-link:hover {
  color: var(--color-text);
}


/* --------------------------------------------------------------------------
   10. Solutions Screen
   -------------------------------------------------------------------------- */

.solutions {
  max-width: 900px;
  margin: 0 auto;
}

.solutions__item {
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--border-radius-lg);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.04);
}

.solutions__item:nth-child(even) {
  background-color: var(--color-surface-muted);
}

.solutions__question-label {
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-xs);
}

.solutions__question-text {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: var(--spacing-md);
}

.solutions__answer {
  font-size: var(--font-size-base);
  margin-bottom: var(--spacing-sm);
}

.solutions__answer-value {
  font-weight: 600;
}

.solutions__your-answer {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-sm);
}

.solutions__your-answer--correct {
  color: var(--color-correct);
}

.solutions__your-answer--wrong {
  color: var(--color-wrong);
}

.solutions__explanation {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: 1.6;
  padding: var(--spacing-sm) var(--spacing-md);
  margin-top: var(--spacing-sm);
  background-color: var(--color-surface-subtle);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-sm);
}


/* --------------------------------------------------------------------------
   11. Onboarding Overlay
   -------------------------------------------------------------------------- */

.onboarding-overlay {
  position: fixed;
  inset: 0;
  z-index: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-overlay);
  padding: var(--spacing-md);
  padding-top: calc(var(--spacing-md) + env(safe-area-inset-top, 0px));
  padding-bottom: calc(var(--spacing-md) + env(safe-area-inset-bottom, 0px));
}

.onboarding-overlay.hidden {
  display: none;
}

.onboarding-card {
  background-color: var(--color-surface);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-xl) var(--spacing-lg);
  max-width: 480px;
  width: 100%;
  text-align: center;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.12);
  max-height: min(90dvh, 100%);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--color-border-strong);
}

@media (min-width: 600px) {
  .onboarding-card {
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-2xl);
    padding-bottom: var(--spacing-2xl);
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.12);
    border-top: none;
    border: 1px solid var(--color-border-strong);
  }
}

.onboarding-card__title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  margin-bottom: var(--spacing-md);
}

.onboarding-card__text {
  font-size: var(--font-size-base);
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: var(--spacing-lg);
}

.onboarding-card__features {
  text-align: left;
  margin-bottom: var(--spacing-xl);
}

.onboarding-card__feature {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-sm);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.onboarding-card__feature-icon {
  flex-shrink: 0;
  margin-top: 2px;
}

.onboarding-card__btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-md) var(--spacing-2xl);
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--color-btn-primary-text);
  background-color: var(--color-btn-primary);
  border: 1px solid var(--color-btn-primary);
  border-radius: var(--border-radius-lg);
  transition: background-color var(--transition-fast), transform var(--transition-fast);
  width: 100%;
  min-height: 52px;
}

@media (min-width: 600px) {
  .onboarding-card__btn {
    width: auto;
  }
}

@media (min-width: 1024px) {
  .onboarding-card__btn:hover {
    background-color: var(--color-btn-primary-hover);
    border-color: var(--color-btn-primary-hover);
  }
}

.onboarding-card__btn:active {
  transform: scale(0.98);
}


/* --------------------------------------------------------------------------
   12. Modal Overlays (Skip, Abandon, Reset)
   -------------------------------------------------------------------------- */

.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 400;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  background-color: var(--color-overlay);
  padding: 0;
}

@media (min-width: 600px) {
  .modal-overlay {
    align-items: center;
    padding: var(--spacing-md);
  }
}

.modal-overlay.hidden {
  display: none;
}

.modal {
  background-color: var(--color-surface);
  border-radius: var(--border-radius-lg) var(--border-radius-lg) 0 0;
  padding: var(--spacing-xl) var(--spacing-lg);
  padding-bottom: calc(var(--spacing-xl) + env(safe-area-inset-bottom, 0px));
  max-width: 400px;
  width: 100%;
  box-shadow: 0 -4px 24px rgba(0, 0, 0, 0.12);
  border-top: 3px solid var(--grey-400);
}

@media (min-width: 600px) {
  .modal {
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.12);
    border-top: none;
    border: 1px solid var(--color-border-strong);
  }
}

.modal__title {
  font-size: var(--font-size-lg);
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
}

.modal__text {
  font-size: var(--font-size-base);
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-lg);
  line-height: 1.5;
}

.modal__actions {
  display: flex;
  flex-direction: column-reverse;
  gap: var(--spacing-sm);
}

@media (min-width: 480px) {
  .modal__actions {
    flex-direction: row;
    gap: var(--spacing-md);
    justify-content: flex-end;
  }
}

.modal__btn-confirm,
.modal__btn-cancel {
  min-height: 48px;
  min-width: var(--touch-target);
  width: 100%;
  border-radius: var(--border-radius-lg);
}

@media (min-width: 480px) {
  .modal__btn-confirm,
  .modal__btn-cancel {
    width: auto;
    border-radius: var(--border-radius-sm);
  }
}

.modal__btn-confirm {
  padding: var(--spacing-sm) var(--spacing-lg);
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-btn-primary-text);
  background-color: var(--color-btn-primary);
  border: 1px solid var(--color-btn-primary);
  border-radius: var(--border-radius-sm);
  transition: background-color var(--transition-fast), border-color var(--transition-fast);
}

@media (min-width: 1024px) {
  .modal__btn-confirm:hover {
    background-color: var(--color-btn-primary-hover);
    border-color: var(--color-btn-primary-hover);
  }
}

.modal__btn-confirm--danger {
  background-color: var(--color-wrong);
  border-color: var(--color-wrong);
}

.modal__btn-confirm--danger:hover {
  background-color: #b71c1c;
}

.modal__btn-cancel {
  padding: var(--spacing-sm) var(--spacing-lg);
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-btn-secondary-text);
  background-color: var(--color-btn-secondary-bg);
  border: 1px solid var(--color-btn-secondary-border);
  border-radius: var(--border-radius-sm);
  transition: color var(--transition-fast), background-color var(--transition-fast),
              border-color var(--transition-fast);
}

@media (min-width: 1024px) {
  .modal__btn-cancel:hover {
    color: var(--color-text);
    background-color: var(--color-btn-secondary-hover);
    border-color: var(--grey-400);
  }
}

.modal__input {
  width: 100%;
  margin-bottom: var(--spacing-lg);
  font-size: max(16px, var(--font-size-base));
}

/* Reset button inside practice set cards */
.reset-ps-btn {
  width: 100%;
  min-height: var(--touch-target);
}


/* --------------------------------------------------------------------------
   13. Progress Indicators & Badges
   -------------------------------------------------------------------------- */

.progress-bar {
  width: 100%;
  height: 4px;
  background-color: var(--color-timer-track);
  border-radius: 2px;
  overflow: hidden;
  margin-top: var(--spacing-sm);
}

.progress-bar__fill {
  height: 100%;
  background-color: var(--color-passed-border);
  border-radius: 2px;
  transition: width var(--transition-normal);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: var(--font-size-xs);
  font-weight: 600;
  padding: 2px var(--spacing-sm);
  border-radius: 12px;
}

.badge--locked {
  background-color: var(--color-surface-muted);
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
}

.badge--passed {
  background-color: #e8f5e9;
  color: var(--color-correct);
}

.badge--attempted {
  background-color: #fff3e0;
  color: #e65100;
}

/* Lock icon on locked cards */
.lock-icon {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}


/* --------------------------------------------------------------------------
   14. Utility Classes
   -------------------------------------------------------------------------- */

.hidden {
  display: none !important;
}

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

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

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

.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }

.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }


/* --------------------------------------------------------------------------
   15. Empty States & Messages
   -------------------------------------------------------------------------- */

.empty-state {
  text-align: center;
  padding: var(--spacing-2xl) var(--spacing-lg);
  color: var(--color-text-muted);
  background-color: var(--color-surface);
  border: 1px dashed var(--color-border-strong);
  border-radius: var(--border-radius-lg);
}

.empty-state__icon {
  font-size: var(--font-size-3xl);
  margin-bottom: var(--spacing-md);
}

.empty-state__text {
  font-size: var(--font-size-base);
  line-height: 1.5;
}


/* --------------------------------------------------------------------------
   16. Attempt Info (shown on results screen)
   -------------------------------------------------------------------------- */

.attempt-info {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  text-align: center;
  margin-bottom: var(--spacing-md);
}

.attempt-info__count {
  font-weight: 600;
}


/* --------------------------------------------------------------------------
   17. Reset Button (in sidebar or settings)
   -------------------------------------------------------------------------- */

.btn-reset {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: var(--font-size-xs);
  color: var(--color-wrong);
  border-radius: var(--border-radius-sm);
  transition: background-color var(--transition-fast);
}

.btn-reset:hover {
  background-color: #ffebee;
}


/* --------------------------------------------------------------------------
   18. Focus & Accessibility
   -------------------------------------------------------------------------- */

/* Visible focus ring for keyboard navigation */
:focus-visible {
  outline: 2px solid var(--color-text);
  outline-offset: 2px;
}

/* Remove default outline for mouse users */
:focus:not(:focus-visible) {
  outline: none;
}

/* Reduced motion preference */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}