/* Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* Colors */
  --bg-primary: #0a0a0f;
  --bg-secondary: #13131a;
  --bg-card: #1a1a24;
  --bg-hover: #22222e;

  --text-primary: #ffffff;
  --text-secondary: #a0a0b0;
  --text-muted: #6b6b7b;

  --accent-primary: #00d9ff;
  --accent-secondary: #7c3aed;
  --accent-gradient: linear-gradient(135deg, #00d9ff 0%, #7c3aed 100%);

  --border-color: #2a2a38;
  --success: #10b981;

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;

  /* Border Radius */
  --radius-sm: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 20px rgba(0, 217, 255, 0.3);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(10, 10, 15, 0.8);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
}

.header-content {
  max-width: 1400px;
  margin: 0 auto;
  padding: var(--spacing-sm) var(--spacing-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--accent-primary);
}

.logo svg {
  color: var(--accent-primary);
}

.nav {
  display: flex;
  gap: var(--spacing-md);
  align-items: center;
}

.nav a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.3s;
  font-weight: 500;
}

.nav a:hover {
  color: var(--text-primary);
}

.btn-register {
  background: var(--accent-gradient);
  color: var(--text-primary) !important;
  padding: 0.5rem 1.5rem;
  border-radius: var(--radius-md);
  font-weight: 600;
}

/* Hero Section */
.hero {
  position: relative;
  min-height: 70vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--spacing-xl) var(--spacing-md);
  margin-top: 60px;
  overflow: hidden;
}

.hero-background {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: 
    linear-gradient(rgba(0,0,0,0.4), rgba(0,0,0,0.4)), /* overlay oscuro */
    url('../images/portada-pagina-web.png') center/cover no-repeat;
  z-index: 0;
  /* Mantener gradientes animados opcionales */
  /* radial-gradient(circle at 50% 50%, rgba(124, 58, 237, 0.15) 0%, transparent 50%),
     radial-gradient(circle at 80% 20%, rgba(0, 217, 255, 0.15) 0%, transparent 50%); */
  animation: pulse 8s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 0.5; }
  50% { opacity: 1; }
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 900px;
  color: white; /* Para que el texto se vea sobre la imagen */
}



.hero-title {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 800;
  margin-bottom: var(--spacing-md);
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.2;
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
}

.hero-date {
  font-size: 1.125rem;
  color: var(--accent-primary);
  margin-bottom: var(--spacing-md);
  font-weight: 600;
}

.hero-btn {
  display: inline-block;
  background: var(--accent-gradient);
  color: var(--text-primary);
  padding: 1rem 2.5rem;
  border-radius: var(--radius-md);
  text-decoration: none;
  font-weight: 600;
  font-size: 1.1rem;
  transition: transform 0.3s, box-shadow 0.3s;
  box-shadow: var(--shadow-glow);
}

.hero-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 30px rgba(0, 217, 255, 0.5);
}

/* Courses Section */
.courses-section {
  padding: var(--spacing-xl) var(--spacing-md);
}

.container {
  max-width: 1400px;
  margin: 0 auto;
}

.section-title {
  font-size: clamp(2rem, 4vw, 2.5rem);
  font-weight: 700;
  text-align: center;
  margin-bottom: var(--spacing-xl);
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.category-section {
  margin-bottom: var(--spacing-xl);
}

.category-title {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: var(--spacing-lg);
  color: var(--accent-primary);
  padding-left: var(--spacing-sm);
  border-left: 4px solid var(--accent-primary);
}

.courses-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--spacing-lg);
}

/* Course Card */
.course-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  cursor: pointer;
  transition: transform 0.3s, box-shadow 0.3s;
  border: 1px solid var(--border-color);
}

.course-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: var(--accent-primary);
}

.course-image {
  position: relative;
  width: 100%;
  height: 200px;
  overflow: hidden;
}

.course-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s;
}

.course-card:hover .course-image img {
  transform: scale(1.1);
}

.course-badge {
  position: absolute;
  top: var(--spacing-sm);
  right: var(--spacing-sm);
  background: var(--success);
  color: white;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 600;
  box-shadow: var(--shadow-sm);
}

.course-badge-full {
  position: absolute;
  top: var(--spacing-sm);
  right: var(--spacing-sm);
  background: #ef4444;
  color: white;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 600;
  box-shadow: var(--shadow-sm);
}

.course-info {
  padding: var(--spacing-md);
}

.course-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}

.course-meta {
  display: flex;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

.course-time,
.course-level {
  font-size: 0.875rem;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-sm);
  background: var(--bg-secondary);
  color: var(--text-secondary);
}

/* Modal */
.modal {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 2000;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-md);
}

.modal.active {
  display: flex;
}

.modal-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(5px);
}

.modal-content {
  position: relative;
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  max-width: 700px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-lg);
}

.modal-close {
  position: absolute;
  top: var(--spacing-md);
  right: var(--spacing-md);
  background: var(--bg-secondary);
  border: none;
  color: var(--text-primary);
  font-size: 2rem;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1;
  transition: background 0.3s;
}

.modal-close:hover {
  background: var(--bg-hover);
}

.modal-header {
  position: relative;
  width: 100%;
  height: 300px;
}

.modal-header img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.modal-badge {
  position: absolute;
  top: var(--spacing-md);
  left: var(--spacing-md);
  background: var(--success);
  color: white;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  box-shadow: var(--shadow-sm);
}

.modal-badge-full {
  position: absolute;
  top: var(--spacing-md);
  left: var(--spacing-md);
  background: #ef4444;
  color: white;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  box-shadow: var(--shadow-sm);
}

.modal-body {
  padding: var(--spacing-lg);
}

.modal-title {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

.modal-meta {
  display: flex;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
  margin-bottom: var(--spacing-lg);
}

.modal-time,
.modal-level,
.modal-date {
  font-size: 0.875rem;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  background: var(--bg-secondary);
  color: var(--text-secondary);
}

.modal-schedule {
  font-size: 0.875rem;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  background: var(--bg-secondary);
  color: var(--text-secondary);
}

.modal-description {
  margin-bottom: var(--spacing-lg);
}

.modal-description h3 {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-sm);
  color: var(--accent-primary);
}

.modal-description h4 {
  font-size: 1.125rem;
  margin-top: var(--spacing-md);
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}

.modal-description p {
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: var(--spacing-md);
}

.modal-description ul {
  list-style: none;
  padding-left: 0;
}

.modal-description li {
  color: var(--text-secondary);
  padding: 0.5rem 0;
  padding-left: 1.5rem;
  position: relative;
}

.modal-description li:before {
  content: "→";
  position: absolute;
  left: 0;
  color: var(--accent-primary);
  font-weight: bold;
}

.modal-btn {
  display: block;
  width: 100%;
  background: var(--accent-gradient);
  color: var(--text-primary);
  padding: 1rem;
  border-radius: var(--radius-md);
  text-align: center;
  text-decoration: none;
  font-weight: 600;
  font-size: 1.1rem;
  transition: transform 0.3s, box-shadow 0.3s;
  box-shadow: var(--shadow-glow);
}

.modal-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 30px rgba(0, 217, 255, 0.5);
}

.modal-btn-disabled {
  display: block;
  width: 100%;
  background: #6b6b7b;
  color: var(--text-primary);
  padding: 1rem;
  border-radius: var(--radius-md);
  text-align: center;
  font-weight: 600;
  font-size: 1.1rem;
  border: none;
  cursor: not-allowed;
  opacity: 0.6;
}

/* Registration Page */
.registration-section {
  min-height: 100vh;
  padding: calc(60px + var(--spacing-xl)) var(--spacing-md) var(--spacing-xl);
}

.container-small {
  max-width: 1000px;
  margin: 0 auto;
}

.registration-title {
  font-size: clamp(2rem, 4vw, 2.5rem);
  font-weight: 700;
  text-align: center;
  margin-bottom: var(--spacing-sm);
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.registration-subtitle {
  text-align: center;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xl);
  font-size: 1.125rem;
}

.participant-types {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

.participant-card {
  background: var(--bg-card);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  cursor: pointer;
  transition: all 0.3s;
}

.participant-card:hover {
  border-color: var(--accent-primary);
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

.participant-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto var(--spacing-md);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-secondary);
  border-radius: 50%;
  color: var(--accent-primary);
}

.participant-title {
  font-size: 1.5rem;
  font-weight: 600;
  text-align: center;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}

.participant-description {
  text-align: center;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-md);
}

.participant-price {
  text-align: center;
  margin-bottom: var(--spacing-lg);
  padding: var(--spacing-md);
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
}

.price-amount {
  display: block;
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--accent-primary);
}

.price-label {
  display: block;
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.participant-features {
  margin-bottom: var(--spacing-lg);
}

.feature-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) 0;
  color: var(--text-secondary);
}

.feature-item svg {
  color: var(--success);
  flex-shrink: 0;
}

.participant-btn {
  width: 100%;
  background: var(--accent-gradient);
  color: var(--text-primary);
  padding: 1rem;
  border: none;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 1.1rem;
  cursor: pointer;
  transition: transform 0.3s, box-shadow 0.3s;
}

.participant-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

.container-form {
  max-width: 900px;
  margin: 0 auto;
}

.selected-course-info {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
  display: flex;
  gap: var(--spacing-lg);
  align-items: center;
}

.selected-course-image {
  width: 200px;
  height: 150px;
  object-fit: cover;
  border-radius: var(--radius-md);
}

.selected-course-details h3 {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-sm);
  color: var(--accent-primary);
}

.selected-course-details p {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-sm);
}

.btn-change-course {
  background: var(--bg-secondary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.3s;
  margin-top: var(--spacing-sm);
}

.btn-change-course:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
}

.registration-form {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
}

.form-section {
  margin-bottom: var(--spacing-xl);
  padding-bottom: var(--spacing-xl);
  border-bottom: 1px solid var(--border-color);
}

.form-section:last-of-type {
  border-bottom: none;
}

.form-section h3 {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-lg);
  color: var(--accent-primary);
}

.radio-group {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-md);
}

.radio-card {
  position: relative;
  cursor: pointer;
}

.radio-card input[type="radio"] {
  position: absolute;
  opacity: 0;
}

.radio-content {
  background: var(--bg-secondary);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  text-align: center;
  transition: all 0.3s;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.radio-card input[type="radio"]:checked + .radio-content {
  border-color: var(--accent-primary);
  background: rgba(0, 217, 255, 0.1);
}

.radio-title {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
}

.radio-price {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent-primary);
}

.form-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-group label {
  font-weight: 600;
  color: var(--text-primary);
}

.form-group input,
.form-group select {
  background: var(--bg-secondary);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0.75rem;
  color: var(--text-primary);
  font-size: 1rem;
  transition: all 0.3s;
}

.form-group input:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--accent-primary);
}

.form-group input.valid {
  border-color: var(--success);
  background: rgba(16, 185, 129, 0.1);
}

.form-group input.invalid {
  border-color: #ef4444;
  background: rgba(239, 68, 68, 0.1);
}

.validation-message {
  font-size: 0.875rem;
  margin-top: 0.25rem;
}

.validation-message.success {
  color: var(--success);
}

.validation-message.error {
  color: #ef4444;
}

.validation-message.warning {
  color: #f59e0b;
}

.payment-methods {
  margin-bottom: var(--spacing-lg);
}

.payment-methods h4 {
  font-size: 1.125rem;
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

.payment-options {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-md);
}

.payment-option {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
}

.payment-option strong {
  display: block;
  color: var(--accent-primary);
  margin-bottom: 0.5rem;
}

.payment-option p {
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin: 0.25rem 0;
}

.image-preview {
  margin-top: var(--spacing-md);
}

.preview-container {
  text-align: center;
}

.preview-container img {
  max-width: 100%;
  max-height: 300px;
  border-radius: var(--radius-md);
  border: 2px solid var(--border-color);
}

.preview-filename {
  margin-top: var(--spacing-sm);
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.price-summary {
  background: var(--bg-secondary);
  border: 2px solid var(--accent-primary);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  text-align: center;
  margin-bottom: var(--spacing-xl);
}

.price-summary h3 {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

.price-display {
  font-size: 3rem;
  font-weight: 700;
  color: var(--accent-primary);
}

.submit-btn {
  width: 100%;
  background: var(--accent-gradient);
  color: var(--text-primary);
  padding: 1.25rem;
  border: none;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 1.25rem;
  cursor: pointer;
  transition: all 0.3s;
  box-shadow: var(--shadow-glow);
}

.submit-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 30px rgba(0, 217, 255, 0.5);
}

/* Validation Info */
.validation-info {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
}

.validation-info h3 {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-md);
  color: var(--accent-primary);
  text-align: center;
}

.validation-methods {
  display: grid;
  gap: var(--spacing-md);
}

.validation-method {
  display: flex;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
}

.validation-method svg {
  color: var(--accent-primary);
  flex-shrink: 0;
}

.validation-method strong {
  display: block;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.validation-method p {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

/* Footer */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: var(--spacing-lg) var(--spacing-md);
  text-align: center;
  color: var(--text-secondary);
}

/* Estilos para página de éxito */
.success-message {
  text-align: center;
  background: var(--bg-card);
  border: 2px solid var(--success);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  margin-top: var(--spacing-xl);
}

.success-icon {
  margin: 0 auto var(--spacing-lg);
  width: 80px;
  height: 80px;
  color: var(--success);
}

.success-message h1 {
  font-size: 2.5rem;
  color: var(--success);
  margin-bottom: var(--spacing-md);
}

.success-message p {
  color: var(--text-secondary);
  font-size: 1.125rem;
  margin-bottom: var(--spacing-md);
}

.success-message strong {
  color: var(--accent-primary);
}

.info-text {
  background: var(--bg-secondary);
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  border-left: 4px solid var(--accent-primary);
  margin: var(--spacing-lg) 0;
}

/* Responsive */
@media (max-width: 768px) {
  .nav a:not(.btn-register) {
    display: none;
  }

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

  .modal-content {
    margin: var(--spacing-sm);
  }

  .participant-types {
    grid-template-columns: 1fr;
  }

  .selected-course-info {
    flex-direction: column;
    text-align: center;
  }

  .selected-course-image {
    width: 100%;
    height: 200px;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .payment-options {
    grid-template-columns: 1fr;
  }
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 10px;
}

::-webkit-scrollbar-track {
  background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
  background: var(--accent-primary);
  border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--accent-secondary);
}