/* ============================================================
   UTILITIES AND RESPONSIVE OVERRIDES
   ------------------------------------------------------------
   Split out of the original 3,093-line css/components.css on
   2026-08-29. The seven files are loaded in their original
   source order, so the cascade is byte-for-byte unchanged:
     layout -> components -> views-content -> views-cards
     -> overlays -> views-progress -> utilities
   Section numbers below are the original components.css numbering.

     25. Forms / inputs
     26. Divider
     27. Empty states
     28. Tooltip
     29. XP gain animation
     30. Responsive breakpoints - MUST remain the LAST of the seven
         split files: it re-declares .page-title, .quiz-question,
         .stat-value, #page-container and #modal-container inside
         media queries and relies on source order to win.
   ============================================================ */

/* ──────────────────────────────────────────
   25. FORMS / INPUTS
   ────────────────────────────────────────── */

.form-group {
  margin-bottom: var(--space-5);
}

.form-label {
  display: block;
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--text-secondary);
  margin-bottom: var(--space-2);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  background: var(--surface-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-sm);
  color: var(--text-primary);
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--text-muted);
}

.form-select {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8' fill='none'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%23475569' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
}

.form-select option {
  background: var(--surface-raised);
  color: var(--text-primary);
}

.form-textarea {
  resize: vertical;
  min-height: 100px;
  line-height: var(--leading-relaxed);
}

.form-hint {
  font-size: var(--text-xs);
  color: var(--text-muted);
  margin-top: var(--space-1);
}

.form-error {
  font-size: var(--text-xs);
  color: var(--accent-red);
  margin-top: var(--space-1);
}

.form-input.error,
.form-select.error,
.form-textarea.error {
  border-color: rgba(248, 113, 113, 0.5);
}


/* ──────────────────────────────────────────
   26. DIVIDER
   ────────────────────────────────────────── */

.divider {
  height: 1px;
  background: var(--border);
  margin: var(--space-6) 0;
}

.divider-label {
  position: relative;
  text-align: center;
}

.divider-label::before,
.divider-label::after {
  content: '';
  position: absolute;
  top: 50%;
  width: 40%;
  height: 1px;
  background: var(--border);
}

.divider-label::before { left: 0; }
.divider-label::after  { right: 0; }

.divider-label span {
  position: relative;
  background: var(--bg);
  padding: 0 var(--space-3);
  font-size: var(--text-xs);
  color: var(--text-muted);
  font-weight: var(--font-medium);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
}


/* ──────────────────────────────────────────
   27. EMPTY STATES
   ────────────────────────────────────────── */

.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-12) var(--space-8);
  text-align: center;
}

.empty-state-icon {
  font-size: 56px;
  margin-bottom: var(--space-5);
  opacity: 0.5;
}

.empty-state-title {
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  color: var(--text-primary);
  margin-bottom: var(--space-2);
}

.empty-state-desc {
  font-size: var(--text-base);
  color: var(--text-muted);
  max-width: 360px;
  margin: 0 auto var(--space-6);
  line-height: var(--leading-relaxed);
}


/* ──────────────────────────────────────────
   28. TOOLTIP
   ────────────────────────────────────────── */

[data-tooltip] {
  position: relative;
}

[data-tooltip]::before {
  content: attr(data-tooltip);
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  background: var(--surface-overlay);
  border: 1px solid var(--border);
  color: var(--text-primary);
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--transition);
  z-index: var(--z-overlay);
  box-shadow: var(--shadow);
}

[data-tooltip]:hover::before {
  opacity: 1;
}


/* ──────────────────────────────────────────
   29. XP GAIN ANIMATION
   ────────────────────────────────────────── */

.xp-gain-popup {
  position: fixed;
  z-index: var(--z-toast);
  pointer-events: none;
  font-size: var(--text-lg);
  font-weight: var(--font-bold);
  color: var(--accent-gold);
  text-shadow: 0 2px 8px rgba(251, 191, 36, 0.4);
  animation: xpFloat 1.5s ease-out forwards;
}

@keyframes xpFloat {
  0%   { opacity: 1; transform: translateY(0) scale(1); }
  60%  { opacity: 1; transform: translateY(-40px) scale(1.1); }
  100% { opacity: 0; transform: translateY(-80px) scale(0.9); }
}


/* ──────────────────────────────────────────
   30. RESPONSIVE BREAKPOINTS
   ────────────────────────────────────────── */

/* Tablet: 768 – 1024px */
@media (max-width: 1024px) {
  :root {
    --sidebar-width: 220px;
  }

  #page-container {
    padding: var(--space-6) var(--space-6);
  }

  .topic-grid {
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  }

  .achievements-grid {
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  }
}

/* Mobile: < 768px */
@media (max-width: 767px) {
  #sidebar {
    transform: translateX(calc(-1 * var(--sidebar-width)));
    box-shadow: var(--shadow-xl);
  }

  #sidebar.open {
    transform: translateX(0);
  }

  .sidebar-toggle-btn {
    display: flex;
  }

  #main-content {
    margin-left: 0;
  }

  #page-container {
    padding: var(--space-5) var(--space-4);
    padding-top: 72px; /* offset for hamburger */
  }

  .page-title {
    font-size: var(--text-3xl);
  }

  .page-header-top {
    flex-direction: column;
    align-items: flex-start;
  }

  .topic-grid {
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: var(--space-3);
  }

  .achievements-grid {
    grid-template-columns: 1fr;
  }

  .welcome-banner {
    padding: var(--space-5);
  }

  .quiz-question {
    padding: var(--space-5);
  }

  .quiz-question-text {
    font-size: var(--text-lg);
  }

  .path-card {
    padding: var(--space-5);
  }

  #toast-container {
    left: var(--space-4);
    right: var(--space-4);
    max-width: none;
    top: auto;
    bottom: var(--space-5);
  }

  .modal-overlay {
    padding: var(--space-4);
    align-items: flex-end;
  }

  #modal-container {
    border-bottom-left-radius: 0;
    border-bottom-right-radius: 0;
    max-height: 85vh;
  }

  .search-overlay {
    padding-top: 60px;
  }

  .stat-card {
    padding: var(--space-4);
  }

  .stat-value {
    font-size: var(--text-2xl);
  }
}

/* Large desktop: > 1400px */
@media (min-width: 1400px) {
  #page-container {
    padding: var(--space-10) var(--space-10);
  }
}