/* ═══ MOBILE RESPONSIVE STYLES ═══ */

/* ─── Breakpoints ───
   mobile: < 768px
   tablet: 768px - 1024px
   desktop: > 1024px
*/

/* ─── Global Mobile Rules ─── */
@media (max-width: 768px) {
  /* Container padding and max-width */
  .section,
  .container,
  .hero-content,
  .compare-grid,
  .qs-grid,
  .quiz-area,
  .quiz-topics,
  .achievement-grid,
  footer {
    max-width: 100%;
    padding-left: 1rem;
    padding-right: 1rem;
  }
  
  /* Font size scaling */
  body {
    font-size: 14px;
  }
  
  h1 { font-size: 1.4rem; }
  h2 { font-size: 1.2rem; }
  h3 { font-size: 1rem; }
  p, .text { font-size: 0.9rem; }
  
  /* Cursor pointer for all interactive elements */
  a, button, .btn, .topic-card, .quiz-option, .round-btn,
  .tag, .qs-card, .month-card, .compare-card,
  .nav-links a, .nav-hamburger, .scroll-top, 
  .achievement-card, .eval-btn {
    cursor: pointer;
  }
}

/* ─── Navigation Mobile ─── */
@media (max-width: 768px) {
  .nav-hamburger {
    display: block;
  }
  
  .nav-links {
    position: fixed;
    top: 52px;
    left: 0;
    right: 0;
    background: var(--bg2);
    flex-direction: column;
    padding: 0.75rem;
    gap: 0.15rem;
    transform: translateY(-120%);
    transition: transform 0.3s;
    z-index: 99;
    border-bottom: 1px solid var(--border);
  }
  
  .nav-links.open {
    transform: translateY(0);
  }
  
  .nav-links a {
    padding: 0.5rem 0.75rem;
    width: 100%;
    text-align: left;
    border-radius: var(--radius-sm);
  }
  
  .nav-links .nav-quiz {
    margin-top: 0.15rem;
    width: 100%;
    text-align: center;
  }
  
  .nav-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.3);
    z-index: 98;
    opacity: 0;
    transition: opacity 0.3s;
    pointer-events: none;
  }
  
  .nav-overlay.open {
    display: block;
    opacity: 1;
    pointer-events: auto;
  }
}

/* ─── Timeline Mobile ─── */
@media (max-width: 768px) {
  .timeline {
    padding-left: 1.5rem;
  }
  
  .timeline-dot {
    left: -1.5rem;
    width: 20px;
    height: 20px;
    font-size: 0.55rem;
  }
  
  .timeline-item {
    padding: 0.75rem 0 1rem;
  }
}

/* ─── Month Cards Mobile ─── */
@media (max-width: 768px) {
  .month-card {
    padding: 1rem;
    width: 100%;
  }
  
  .month-num {
    font-size: 0.6rem;
  }
  
  .month-card h3 {
    font-size: 1rem;
  }
  
  .month-card > p {
    font-size: 0.82rem;
  }
}

/* ─── Quiz Options Mobile ─── */
@media (max-width: 768px) {
  .quiz-option {
    min-height: 48px;
    padding: 0.8rem 1rem;
    display: flex;
    align-items: center;
  }
  
  .quiz-option .opt-letter {
    width: 28px;
    height: 28px;
    font-size: 0.75rem;
  }
  
  .quiz-option:hover:not(.disabled) {
    border-color: var(--accent);
    background: var(--bg3);
  }
}

/* ─── Topic Cards Mobile ─── */
@media (max-width: 768px) {
  .quiz-topics {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.5rem;
  }
  
  .topic-card {
    padding: 0.75rem;
    min-height: 80px;
  }
  
  .topic-icon {
    font-size: 1.4rem;
    margin-bottom: 0.25rem;
  }
  
  .topic-card h4 {
    font-size: 0.72rem;
  }
  
  .q-count {
    font-size: 0.6rem;
  }
}

/* ─── Round Buttons Mobile ─── */
@media (max-width: 768px) {
  .round-btn {
    width: 100%;
    padding: 0.5rem 1rem;
    font-size: 0.75rem;
  }
  
  .round-selector {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
  }
}

/* ─── Hero Mobile ─── */
@media (max-width: 768px) {
  .hero {
    min-height: auto;
    padding: 4.5rem 1rem 2.5rem;
  }
  
  .hero h1 {
    font-size: clamp(1.6rem, 7vw, 2.2rem);
  }
  
  .hero p {
    font-size: 0.9rem;
  }
  
  .hero-buttons {
    flex-direction: column;
    gap: 0.5rem;
  }
  
  .hero-buttons .btn {
    width: 100%;
    justify-content: center;
  }
}

/* ─── Compare Grid Mobile ─── */
@media (max-width: 768px) {
  .compare-grid {
    grid-template-columns: 1fr;
  }
}

/* ─── Quick Start Grid Mobile ─── */
@media (max-width: 768px) {
  .qs-grid {
    grid-template-columns: 1fr;
  }
}

/* ─── Achievements Mobile ─── */
@media (max-width: 768px) {
  .achievement-grid {
    grid-template-columns: 1fr 1fr;
  }
  
  .achievement-card {
    padding: 0.85rem;
  }
}

/* ─── Quiz Area Mobile ─── */
@media (max-width: 768px) {
  .quiz-area {
    padding: 1.1rem;
  }
  
  .quiz-question {
    font-size: 0.9rem;
  }
}

/* ─── Eval Stats Mobile ─── */
@media (max-width: 768px) {
  .eval-stats {
    grid-template-columns: 1fr;
  }
}

/* ─── Section Mobile ─── */
@media (max-width: 768px) {
  .section {
    padding: 2.5rem 1rem;
  }
  
  .section-header h2 {
    font-size: 1.3rem;
  }
  
  .section-header p {
    font-size: 0.85rem;
  }
}

/* ─── Footer Mobile ─── */
@media (max-width: 768px) {
  footer {
    padding: 1.5rem 1rem;
    font-size: 0.75rem;
  }
}

/* ─── Scroll Top Button Mobile ─── */
@media (max-width: 768px) {
  .scroll-top {
    width: 40px;
    height: 40px;
    bottom: 1rem;
    right: 1rem;
  }
}

/* ─── Extra Small Screens (< 480px) ─── */
@media (max-width: 480px) {
  .hero {
    padding: 3.5rem 0.75rem 2rem;
  }
  
  .hero h1 {
    font-size: 1.4rem;
  }
  
  .hero p {
    font-size: 0.85rem;
  }
  
  .section {
    padding: 2rem 0.75rem;
  }
  
  .section-header h2 {
    font-size: 1.15rem;
  }
  
  .timeline {
    padding-left: 1.25rem;
  }
  
  .timeline-dot {
    left: -1.25rem;
    width: 18px;
    height: 18px;
    font-size: 0.5rem;
  }
  
  .month-card {
    padding: 0.85rem;
  }
  
  .quiz-topics {
    grid-template-columns: 1fr;
  }
  
  .quiz-question {
    font-size: 0.9rem;
  }
  
  .quiz-option {
    padding: 0.65rem 0.8rem;
    font-size: 0.8rem;
  }
  
  .quiz-area {
    padding: 0.85rem;
  }
  
  .achievement-grid {
    grid-template-columns: 1fr;
  }
  
  .compare-grid {
    grid-template-columns: 1fr;
  }
  
  .qs-grid {
    grid-template-columns: 1fr;
  }
  
  .tag {
    font-size: 0.62rem;
    padding: 0.15rem 0.45rem;
  }
}

/* ─── Tablet Specific (768px - 1024px) ─── */
@media (min-width: 768px) and (max-width: 1024px) {
  .quiz-topics {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .achievement-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .qs-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .month-card {
    padding: 1.1rem;
  }
}

/* ─── Touch Device Enhancements ─── */
/* Ensure clickable elements have adequate touch targets */
@media (hover: none) and (pointer: coarse) {
  .topic-card,
  .quiz-option,
  .round-btn,
  .btn {
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
  }
  
  .topic-card:active,
  .quiz-option:active,
  .round-btn:active,
  .btn:active {
    background: var(--bg3);
  }
}

/* ─── Z-Index Fixes for Mobile ─── */
@media (max-width: 768px) {
  .nav-hamburger {
    z-index: 101;
  }
  
  .nav-links {
    z-index: 99;
  }
  
  .nav-overlay {
    z-index: 98;
  }
  
  .scroll-top {
    z-index: 150;
  }
  
  /* Ensure nothing blocks touch targets */
  * {
    -webkit-tap-highlight-color: rgba(0, 0, 0, 0.1);
  }
}