/* ===== RESPONSIVE DESIGN ===== */

/* Large Desktop (1200px and up) */
@media (min-width: 1200px) {
  .container {
    max-width: 1400px;
  }

  .welcome-card {
    padding: 4rem;
  }

  .logo {
    font-size: 3.5rem;
  }

  .welcome-title {
    font-size: 1rem;
  }
}

/* Desktop (992px to 1199px) */
@media (max-width: 1199px) {
  .container {
    padding: 0 30px;
  }
}

/* Tablet (768px to 991px) */
@media (max-width: 991px) {
  .header {
    padding: 0;
  }

  .logo {
    font-size: 2.5rem;
  }

  .logo i {
    font-size: 2rem;
  }

  .welcome-card {
    padding: 2.5rem;
    margin: 0 1rem;
  }

  .welcome-title {
    font-size: 1rem;
  }

  .welcome-description {
    font-size: 0.8rem;
  }

  .phase-header {
    flex-direction: column;
    text-align: center;
    gap: 0.75rem;
  }

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

/* Mobile Large (576px to 767px) */
@media (max-width: 767px) {
  .container {
    padding: 0 15px;
  }

  .header {
    padding: 0;
    margin: 0;
    height: 0;
    border: 0;
    background: transparent;
  }

  .logo {
    font-size: 2rem;
    flex-direction: column;
    gap: 0.5rem;
  }

  .logo i {
    font-size: 1.5rem;
  }

  .subtitle {
    font-size: 1rem;
  }

  .main-content {
    padding: 1rem 0;
  }

  .welcome-card {
    padding: 2rem 1.5rem;
    border-radius: 15px;
  }

  .welcome-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
  }

  .welcome-title {
    font-size: 1rem;
    margin-bottom: 0.75rem;
  }

  .welcome-description {
    font-size: 0.8rem;
    margin-bottom: 2rem;
  }

  .quiz-phases {
    gap: 1rem;
    margin-bottom: 2rem;
  }

  .phase-card {
    padding: 1.25rem;
  }

  .phase-header {
    margin-bottom: 0.75rem;
  }

  .phase-icon {
    width: 50px;
    height: 50px;
    font-size: 1.5rem;
  }

  .phase-info h3 {
    font-size: 1.1rem;
  }

  .phase-info p {
    font-size: 0.8rem;
  }

  .phase-details li {
    font-size: 0.8rem;
    margin-bottom: 0.4rem;
  }

  .start-btn {
    padding: 0.875rem 2rem;
    font-size: 1.1rem;
  }

  .instructions {
    padding: 1.25rem;
  }

  .instructions h3 {
    font-size: 1rem;
  }

  .instructions li {
    font-size: 0.8rem;
  }
}

/* Mobile Small (up to 575px) */
@media (max-width: 575px) {
  .container {
    padding: 0 10px;
  }

  .header {
    padding: 0;
    margin: 0;
    height: 0;
    border: 0;
    background: transparent;
  }

  .logo {
    font-size: 1.8rem;
  }

  .logo i {
    font-size: 1.3rem;
  }

  .subtitle {
    font-size: 0.9rem;
  }

  .welcome-card {
    padding: 1.5rem 1rem;
    border-radius: 12px;
  }

  .welcome-icon {
    font-size: 2.5rem;
  }

  .welcome-title {
    font-size: 1rem;
  }

  .welcome-description {
    font-size: 0.8rem;
  }

  .phase-card {
    padding: 1rem;
  }

  .phase-icon {
    width: 45px;
    height: 45px;
    font-size: 1.3rem;
  }

  .phase-info h3 {
    font-size: 1rem;
  }

  .phase-info p {
    font-size: 0.75rem;
  }

  .status-badge {
    padding: 0.4rem 0.8rem;
    font-size: 0.7rem;
  }

  .phase-details li {
    font-size: 0.75rem;
    gap: 0.5rem;
  }

  .phase-details li i {
    width: 14px;
  }

  .start-btn {
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    width: 100%;
    justify-content: center;
  }

  .instructions {
    padding: 1rem;
  }

  .instructions h3 {
    font-size: 0.9rem;
  }

  .instructions li {
    font-size: 0.75rem;
    padding-left: 1.25rem;
  }

  .footer {
    padding: 1.5rem 0;
    font-size: 0.8rem;
  }
}

/* Extra Small Mobile (up to 375px) */
@media (max-width: 375px) {
  .welcome-card {
    padding: 1.25rem 0.75rem;
  }

  .welcome-title {
    font-size: 1rem;
  }

  .welcome-description {
    font-size: 0.85rem;
  }

  .phase-card {
    padding: 0.875rem;
  }

  .phase-icon {
    width: 40px;
    height: 40px;
    font-size: 1.2rem;
  }

  .start-btn {
    padding: 0.7rem 1.25rem;
    font-size: 0.95rem;
  }
}

/* Landscape Mobile */
@media (max-height: 600px) and (orientation: landscape) {
  .header {
    padding: 0.5rem 0;
    margin-bottom: 0.5rem;
  }

  .main-content {
    padding: 0.5rem 0;
  }

  .welcome-card {
    padding: 1.5rem;
  }

  .welcome-icon {
    font-size: 2rem;
    margin-bottom: 0.75rem;
  }

  .welcome-title {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
  }

  .welcome-description {
    margin-bottom: 1.5rem;
  }

  .quiz-phases {
    margin-bottom: 1.5rem;
  }

  .start-section {
    margin-bottom: 1.5rem;
  }
}

/* High DPI Displays */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
  .welcome-card {
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
  }

  .phase-card.active {
    box-shadow: 0 10px 25px rgba(52, 152, 219, 0.12);
  }
}

/* Print Styles */
@media print {
  .header,
  .footer,
  .start-section,
  .instructions {
    display: none;
  }

  .welcome-card {
    box-shadow: none;
    border: 1px solid #ccc;
  }

  body {
    background: white;
  }
}