/* MODAL POPUP SYSTEM - PURE CSS */

/* ============================================
 * TABLE OF CONTENTS
 * ============================================
 * 
 * 1. MODAL TOGGLE & OVERLAY
 * 2. MODAL CONTAINER
 * 3. MODAL HEADER
 * 4. MODAL BODY & CONTENT
 * 5. MODAL FORM ELEMENTS
 * 6. MODAL BUTTONS & ACTIONS
 * 7. ANIMATIONS & EFFECTS
 * 8. RESPONSIVE DESIGN
 * 
 * ============================================ */

/* ============================================
 * 1. MODAL TOGGLE & OVERLAY
 * ============================================ */

/* Modal Toggle - Hidden Checkbox */
.modal-toggle {
  display: none;
}

/* Modal Overlay - Backdrop */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.85);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  z-index: 20000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55),
              visibility 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
  padding: 20px;
  overflow-y: auto;
}

/* Show Modal when checkbox is checked */
.modal-toggle:checked + .modal-overlay {
  opacity: 1;
  visibility: visible;
}

.modal-toggle:checked + .modal-overlay .modal-container {
  transform: scale(1) translateY(0);
  opacity: 1;
}

/* Modal Container */
.modal-container {
  background: linear-gradient(135deg, #0a0a0a 0%, #1a1a1a 100%);
  border: 2px solid #00ffc2;
  border-radius: 12px;
  box-shadow: 0 0 50px rgba(0, 255, 194, 0.3),
              0 0 100px rgba(0, 255, 194, 0.1),
              inset 0 0 60px rgba(0, 255, 194, 0.05);
  max-width: 600px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  position: relative;
  transform: scale(0.7) translateY(-50px);
  opacity: 0;
  transition: transform 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55),
              opacity 0.4s ease;
  animation: modalGlow 2s ease-in-out infinite alternate;
}

/* Small Modal Variant */
.modal-small {
  max-width: 450px;
}

/* Modal Glow Animation */
@keyframes modalGlow {
  0% {
    box-shadow: 0 0 50px rgba(0, 255, 194, 0.3),
                0 0 100px rgba(0, 255, 194, 0.1),
                inset 0 0 60px rgba(0, 255, 194, 0.05);
  }
  100% {
    box-shadow: 0 0 60px rgba(0, 255, 194, 0.4),
                0 0 120px rgba(0, 255, 194, 0.15),
                inset 0 0 80px rgba(0, 255, 194, 0.08);
  }
}

/* Modal Close Button */
.modal-close {
  position: absolute;
  top: 15px;
  right: 15px;
  width: 40px;
  height: 40px;
  background: rgba(255, 0, 0, 0.1);
  border: 2px solid #ff0040;
  border-radius: 50%;
  color: #ff0040;
  font-size: 28px;
  line-height: 36px;
  text-align: center;
  cursor: pointer;
  transition: all 0.3s ease;
  font-weight: bold;
  z-index: 10;
}

.modal-close:hover {
  background: rgba(255, 0, 0, 0.2);
  transform: rotate(90deg) scale(1.1);
  box-shadow: 0 0 20px rgba(255, 0, 64, 0.5);
}

/* Modal Header */
.modal-header {
  padding: 40px 40px 20px;
  border-bottom: 2px solid rgba(0, 255, 194, 0.2);
  text-align: center;
}

.modal-title {
  font-family: 'Orbitron', monospace;
  font-size: 2rem;
  font-weight: 900;
  color: #ffd700;
  text-transform: uppercase;
  letter-spacing: 4px;
  margin: 0 0 10px 0;
  text-shadow: 0 0 20px rgba(255, 215, 0, 0.5),
               0 0 40px rgba(255, 215, 0, 0.3);
  animation: titlePulse 2s ease-in-out infinite;
}

@keyframes titlePulse {
  0%, 100% { text-shadow: 0 0 20px rgba(255, 215, 0, 0.5), 0 0 40px rgba(255, 215, 0, 0.3); }
  50% { text-shadow: 0 0 30px rgba(255, 215, 0, 0.7), 0 0 60px rgba(255, 215, 0, 0.4); }
}

.modal-subtitle {
  font-family: 'Roboto Mono', monospace;
  font-size: 0.95rem;
  color: #00ffc2;
  text-transform: uppercase;
  letter-spacing: 2px;
  margin: 0;
  opacity: 0.8;
}

/* Modal Body */
.modal-body {
  padding: 30px 40px 40px;
}

.modal-text {
  font-family: 'Roboto Mono', monospace;
  font-size: 1.1rem;
  color: #e0e0e0;
  line-height: 1.8;
  text-align: center;
  margin-bottom: 30px;
}

/* Modal Form */
.modal-form {
  width: 100%;
}

.form-group {
  margin-bottom: 25px;
}

.form-label {
  display: block;
  font-family: 'Orbitron', monospace;
  font-size: 0.85rem;
  color: #00ffc2;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 8px;
  font-weight: 700;
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 14px 18px;
  background: rgba(0, 0, 0, 0.5);
  border: 2px solid rgba(0, 255, 194, 0.3);
  border-radius: 6px;
  color: #ffffff;
  font-family: 'Roboto Mono', monospace;
  font-size: 1rem;
  transition: all 0.3s ease;
  outline: none;
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: rgba(255, 255, 255, 0.4);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  border-color: #00ffc2;
  background: rgba(0, 255, 194, 0.05);
  box-shadow: 0 0 20px rgba(0, 255, 194, 0.2),
              inset 0 0 10px rgba(0, 255, 194, 0.1);
  transform: translateY(-2px);
}

.form-select {
  cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2300ffc2' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 15px center;
  background-size: 12px;
  padding-right: 45px;
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
}

.form-select option {
  background: #0a0a0a;
  color: #ffffff;
  padding: 10px;
}

.form-textarea {
  resize: vertical;
  min-height: 120px;
  line-height: 1.6;
}

/* Checkbox Styling */
.form-checkbox-label {
  display: flex;
  align-items: center;
  gap: 12px;
  cursor: pointer;
  font-family: 'Roboto Mono', monospace;
  font-size: 0.9rem;
  color: #e0e0e0;
  -webkit-user-select: none;
  user-select: none;
}

.form-checkbox {
  width: 20px;
  height: 20px;
  accent-color: #00ffc2;
  cursor: pointer;
}

.form-checkbox-label:hover {
  color: #00ffc2;
}

/* Modal Actions */
.modal-actions {
  display: flex;
  gap: 15px;
  margin-top: 30px;
  justify-content: center;
  flex-wrap: wrap;
}

.modal-btn-primary,
.modal-btn-secondary {
  padding: 14px 32px;
  font-family: 'Orbitron', monospace;
  font-size: 1rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.3s ease;
  border: none;
  flex: 1;
  min-width: 150px;
  text-align: center;
  display: inline-block;
}

.modal-btn-primary {
  background: linear-gradient(135deg, #00ffc2 0%, #00d4a0 100%);
  color: #0a0a0a;
  box-shadow: 0 4px 15px rgba(0, 255, 194, 0.3);
}

.modal-btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 25px rgba(0, 255, 194, 0.5);
  background: linear-gradient(135deg, #00d4a0 0%, #00ffc2 100%);
}

.modal-btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  color: #00ffc2;
  border: 2px solid #00ffc2;
  box-shadow: none;
}

.modal-btn-secondary:hover {
  background: rgba(0, 255, 194, 0.1);
  transform: translateY(-3px);
  box-shadow: 0 4px 15px rgba(0, 255, 194, 0.2);
}

/* Scrollbar for Modal */
.modal-container::-webkit-scrollbar {
  width: 8px;
}

.modal-container::-webkit-scrollbar-track {
  background: rgba(0, 0, 0, 0.3);
  border-radius: 10px;
}

.modal-container::-webkit-scrollbar-thumb {
  background: #00ffc2;
  border-radius: 10px;
  transition: background 0.3s ease;
}

.modal-container::-webkit-scrollbar-thumb:hover {
  background: #ffd700;
}

/* Responsive Design */
@media screen and (max-width: 768px) {
  .modal-overlay {
    padding: 15px;
  }

  .modal-container {
    max-height: 95vh;
  }

  .modal-header {
    padding: 30px 25px 15px;
  }

  .modal-title {
    font-size: 1.5rem;
    letter-spacing: 2px;
  }

  .modal-subtitle {
    font-size: 0.85rem;
  }

  .modal-body {
    padding: 20px 25px 30px;
  }

  .form-input,
  .form-select,
  .form-textarea {
    padding: 12px 15px;
    font-size: 0.95rem;
  }

  .modal-actions {
    flex-direction: column;
  }

  .modal-btn-primary,
  .modal-btn-secondary {
    width: 100%;
    min-width: 100%;
  }

  .modal-close {
    width: 35px;
    height: 35px;
    font-size: 24px;
    line-height: 31px;
    top: 10px;
    right: 10px;
  }
}

@media screen and (max-width: 480px) {
  .modal-title {
    font-size: 1.3rem;
    letter-spacing: 1.5px;
  }

  .modal-subtitle {
    font-size: 0.75rem;
  }

  .form-label {
    font-size: 0.75rem;
  }

  .form-input,
  .form-select,
  .form-textarea {
    font-size: 0.9rem;
  }
}

/* Loading State Animation (Optional) */
@keyframes formLoading {
  0% { opacity: 0.6; }
  50% { opacity: 1; }
  100% { opacity: 0.6; }
}

.form-loading .modal-btn-primary {
  pointer-events: none;
  animation: formLoading 1.5s ease-in-out infinite;
}

.form-loading .modal-btn-primary::after {
  content: '...';
  animation: dots 1.5s steps(4, end) infinite;
}

@keyframes dots {
  0%, 20% { content: '.'; }
  40% { content: '..'; }
  60%, 100% { content: '...'; }
}

/* Card Enroll Button (for course cards) */
.card-enroll-btn {
  margin-top: 15px;
  width: 100%;
  padding: 12px 20px;
  font-size: 0.9rem;
  background: linear-gradient(135deg, #00ffc2 0%, #00d4a0 100%);
  color: #0a0a0a;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-family: 'Orbitron', monospace;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
  transition: all 0.3s ease;
  text-align: center;
  display: block;
  box-shadow: 0 4px 15px rgba(0, 255, 194, 0.3);
}

.card-enroll-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 25px rgba(0, 255, 194, 0.5);
  background: linear-gradient(135deg, #00d4a0 0%, #00ffc2 100%);
}