/* ==========================================================================
   Responsive — Mobile-first layout + breakpoint overrides
   Breakpoint: 769px (desktop)
   ========================================================================== */

/* --- Container --- */
.container {
  width: 100%;
  padding-inline: var(--space-md);
  margin-inline: auto;
}

/* --- Visibility helpers --- */
.desktop-only {
  display: none !important;
}

.mobile-only {
  display: block !important;
}

/* --- Mobile (default) --- */

/* Single-column stack */
.dashboard-grid {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

/* Hero card: vertical on mobile */
.area-hero {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hero-partner {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  text-align: center;
}

.hero-stats {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
}

/* Large touch targets in the bottom 60% (thumb zone) */
.choices-area {
  position: sticky;
  bottom: 0;
  z-index: var(--z-sticky);
  padding: var(--space-md);
  padding-bottom: env(safe-area-inset-bottom, var(--space-md));
  background-color: var(--color-bg-main);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  margin-top: auto;
}

.choices-area .btn {
  width: 100%;
  min-height: 52px;
  font-size: var(--font-size-md);
}

/* Question content scrolls above the sticky choices */
.question-content {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-md);
  padding-bottom: var(--space-xl);
}

/* Session screen is a flex column to push choices down */
.session-screen {
  display: flex;
  flex-direction: column;
  min-height: 100dvh;
}

/* --- Landscape mobile: 2x2 grid for choices --- */
@media (orientation: landscape) and (max-width: 768px) {
  .choices-area {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-sm);
    position: sticky;
    bottom: 0;
  }

  .choices-area .btn {
    min-height: 48px;
  }
}

/* ==========================================================================
   Desktop (>= 769px)
   6-column grid with named areas:
     Row 1: hero(3) | today(3)
     Row 2: badges(2) | mastery(2) | heatmap(2)
   ========================================================================== */
@media (min-width: 769px) {
  .container {
    max-width: 1200px;
    padding-inline: var(--space-xl);
  }

  .desktop-only {
    display: block !important;
  }

  .mobile-only {
    display: none !important;
  }

  /* --- Dashboard grid layout --- */
  .dashboard {
    padding: var(--space-sm) var(--space-md);
  }

  .dashboard-header {
    padding-bottom: var(--space-sm);
  }

  .dashboard-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    grid-template-rows: auto auto;
    gap: var(--space-sm);
    grid-template-areas:
      "hero    hero    hero    today   today   today"
      "badges  badges  mastery mastery heatmap heatmap"
      "history history history history history history";
  }

  .area-hero    { grid-area: hero; }
  .area-today   { grid-area: today; }
  .area-badges  { grid-area: badges; }
  .area-mastery { grid-area: mastery; }
  .area-heatmap { grid-area: heatmap; }
  .area-history { grid-area: history; }

  /* --- Hero card: partner left, stats right --- */
  .area-hero {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: var(--space-md);
  }

  .hero-partner {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 120px;
  }

  .hero-partner partner-display {
    transform: scale(1.8);
    transform-origin: center center;
  }

  .hero-stats {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-xs);
  }

  .goal-ring-container {
    width: 56px;
    height: 56px;
    margin-bottom: 0;
  }

  /* --- Cards: compact --- */
  .card {
    padding: var(--space-sm) var(--space-md);
  }

  .card h3 {
    font-size: var(--font-size-base);
    margin-bottom: var(--space-xs);
  }

  /* --- Today + Actions area --- */
  .today-stats-grid {
    gap: var(--space-sm);
  }

  .stat-value {
    font-size: var(--font-size-lg);
  }

  .dashboard-actions {
    gap: var(--space-xs);
    margin-top: var(--space-sm);
  }

  .dashboard-actions .btn-cta {
    min-height: 40px;
    padding: var(--space-xs) var(--space-md);
    font-size: var(--font-size-sm);
  }

  .dashboard-secondary-actions .btn {
    min-height: 36px;
    padding: var(--space-xs) var(--space-sm);
    font-size: var(--font-size-xs);
  }

  /* --- Mastery area --- */
  .mastery-row {
    padding: 2px 0;
  }

  .mock-exam-btn {
    margin-top: var(--space-sm);
    width: 100%;
    min-height: 36px;
    font-size: var(--font-size-sm);
  }

  /* --- Misc --- */
  .exam-countdown {
    margin-bottom: var(--space-xs);
  }

  /* Choices are not sticky on desktop; normal flow */
  .choices-area {
    position: static;
    padding: 0;
    background-color: transparent;
    max-width: 640px;
    margin-inline: auto;
  }

  /* Session screen centres content */
  .session-screen {
    max-width: 720px;
    margin-inline: auto;
    min-height: auto;
  }

  .question-content {
    padding: var(--space-lg);
  }

  /* Keyboard shortcut indicators (desktop only) */
  .kbd-hint {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 24px;
    height: 24px;
    padding: 0 var(--space-xs);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-sub);
    background-color: rgba(139, 148, 158, 0.12);
    border: 1px solid rgba(139, 148, 158, 0.25);
    border-radius: var(--radius-sm);
    font-family: var(--font-family);
    user-select: none;
  }

  /* Wider modals on desktop */
  .modal-content {
    max-width: 560px;
  }

  /* Mock exam: mode cards side by side on desktop */
  .mock-mode-cards {
    flex-direction: row;
    gap: var(--space-md);
  }

  .mock-mode-card {
    flex: 1;
  }

  /* Timer font size on desktop */
  .mock-timer-wrap exam-timer {
    font-size: var(--font-size-lg);
  }

  /* Card hover effects only on pointer devices */
  @media (hover: hover) {
    .card:hover {
      transform: translateY(-2px);
    }
  }
}