/* Modern CSS Variables */
:root {
  --primary-color: #667eea;
  --secondary-color: #764ba2;
  --accent-color: #45b7d1;
  --success-color: #4caf50;
  --warning-color: #ff9800;
  --error-color: #f44336;
  --dark-bg: #0a0a0a;
  --card-bg: #1a1a1a;
  --text-primary: #ffffff;
  --text-secondary: #b0b0b0;
  --border-color: rgba(255, 255, 255, 0.1);
  --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  --gradient-accent: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
  --shadow-light: 0 4px 20px rgba(0, 0, 0, 0.1);
  --shadow-medium: 0 8px 32px rgba(0, 0, 0, 0.3);
  --shadow-heavy: 0 16px 64px rgba(0, 0, 0, 0.5);
  --border-radius: 12px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--dark-bg);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  min-height: 100vh;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: 'Poppins', sans-serif;
  font-weight: 600;
  line-height: 1.2;
  margin-bottom: 1rem;
}

h1 {
  font-size: 2.5rem;
  font-weight: 700;
}

h2 {
  font-size: 2rem;
}

h3 {
  font-size: 1.5rem;
}

p {
  margin-bottom: 1rem;
}

a {
  color: var(--accent-color);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  color: var(--primary-color);
  text-decoration: underline;
}

/* Container Layouts */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

.admin-container {
  max-width: 800px;
  margin: 0 auto;
  padding: 2rem;
}

/* Cards */
.card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 2rem;
  margin-bottom: 2rem;
  box-shadow: var(--shadow-medium);
  transition: var(--transition);
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-heavy);
}

/* Video Components */
.video-box {
  background: var(--card-bg);
  border-radius: var(--border-radius);
  margin: 2rem auto;
  padding: 1rem;
  width: 100%;
  max-width: 600px;
  box-shadow: var(--shadow-medium);
  border: 1px solid var(--border-color);
  transition: var(--transition);
}

.video-box:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-heavy);
  border-color: var(--accent-color);
}

.video-box iframe,
.video-box video {
  width: 100%;
  aspect-ratio: 16/9;
  border-radius: 8px;
  border: none;
}

.video-info {
  padding: 1.5rem;
  text-align: left;
}

.video-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.video-genre {
  color: var(--accent-color);
  font-size: 0.9rem;
  font-weight: 500;
  margin-bottom: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.video-description {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
  margin-bottom: 1rem;
}

.likes {
  color: var(--error-color);
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

.comentarios {
  color: var(--text-secondary);
  font-style: italic;
  font-size: 0.9rem;
}

/* Form Elements */
.form-group {
  margin-bottom: 1.5rem;
}

.form-label {
  display: block;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

input,
textarea,
select {
  width: 100%;
  padding: 1rem;
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius);
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
  font-size: 1rem;
  font-family: inherit;
  transition: var(--transition);
  outline: none;
}

input:focus,
textarea:focus,
select:focus {
  border-color: var(--accent-color);
  background: rgba(255, 255, 255, 0.08);
  box-shadow: 0 0 0 4px rgba(69, 183, 209, 0.1);
}

input::placeholder,
textarea::placeholder {
  color: rgba(176, 176, 176, 0.7);
}

/* Buttons */
button,
.btn {
  padding: 1rem 2rem;
  border: none;
  border-radius: var(--border-radius);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.btn-primary {
  background: var(--gradient-primary);
  color: white;
}

.btn-secondary {
  background: var(--gradient-secondary);
  color: white;
}

.btn-accent {
  background: var(--gradient-accent);
  color: white;
}

.btn-success {
  background: var(--success-color);
  color: white;
}

.btn-warning {
  background: var(--warning-color);
  color: white;
}

.btn-error {
  background: var(--error-color);
  color: white;
}

button:hover,
.btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-medium);
}

button:active,
.btn:active {
  transform: translateY(0);
}

button:disabled,
.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none !important;
}

/* Utility Classes */
.text-center {
  text-align: center;
}

.text-left {
  text-align: left;
}

.text-right {
  text-align: right;
}

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

.p-1 { padding: 0.5rem; }
.p-2 { padding: 1rem; }
.p-3 { padding: 1.5rem; }
.p-4 { padding: 2rem; }

.hidden {
  display: none !important;
}

.visible {
  display: block !important;
}

/* Loading States */
.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  color: var(--text-secondary);
}

.spinner {
  width: 24px;
  height: 24px;
  border: 3px solid rgba(69, 183, 209, 0.3);
  border-top: 3px solid var(--accent-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* Alerts and Messages */
.alert {
  padding: 1rem 1.5rem;
  border-radius: var(--border-radius);
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 500;
}

.alert-success {
  background: rgba(76, 175, 80, 0.1);
  border: 1px solid rgba(76, 175, 80, 0.3);
  color: var(--success-color);
}

.alert-warning {
  background: rgba(255, 152, 0, 0.1);
  border: 1px solid rgba(255, 152, 0, 0.3);
  color: var(--warning-color);
}

.alert-error {
  background: rgba(244, 67, 54, 0.1);
  border: 1px solid rgba(244, 67, 54, 0.3);
  color: var(--error-color);
}

.alert-info {
  background: rgba(69, 183, 209, 0.1);
  border: 1px solid rgba(69, 183, 209, 0.3);
  color: var(--accent-color);
}

/* Grid System */
.grid {
  display: grid;
  gap: 2rem;
}

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.grid-4 {
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

/* Flexbox Utilities */
.flex {
  display: flex;
}

.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

.flex-between {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

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

.flex-wrap {
  flex-wrap: wrap;
}

.gap-1 { gap: 0.5rem; }
.gap-2 { gap: 1rem; }
.gap-3 { gap: 1.5rem; }
.gap-4 { gap: 2rem; }

/* Responsive Design */
@media (max-width: 1200px) {
  .container {
    padding: 0 1.5rem;
  }
}

@media (max-width: 768px) {
  html {
    font-size: 14px;
  }

  .container {
    padding: 0 1rem;
  }

  .admin-container {
    padding: 1rem;
  }

  .video-box {
    margin: 1rem auto;
    padding: 0.75rem;
  }

  .video-info {
    padding: 1rem;
  }

  h1 {
    font-size: 2rem;
  }

  h2 {
    font-size: 1.75rem;
  }

  h3 {
    font-size: 1.25rem;
  }

  button,
  .btn {
    padding: 0.75rem 1.5rem;
    font-size: 0.9rem;
  }

  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  html {
    font-size: 13px;
  }

  .container {
    padding: 0 0.5rem;
  }

  .card {
    padding: 1rem;
  }

  .video-box {
    padding: 0.5rem;
  }

  .video-info {
    padding: 0.75rem;
  }

  button,
  .btn {
    padding: 0.5rem 1rem;
    font-size: 0.8rem;
  }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Focus styles for better accessibility */
button:focus-visible,
.btn:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible,
a:focus-visible {
  outline: 2px solid var(--accent-color);
  outline-offset: 2px;
}

/* Dark mode enhancements */
@media (prefers-color-scheme: dark) {
  :root {
    --dark-bg: #000000;
    --card-bg: #111111;
    --text-primary: #ffffff;
    --text-secondary: #cccccc;
    --border-color: rgba(255, 255, 255, 0.15);
  }
}

/* Print styles */
@media print {
  body {
    background: white;
    color: black;
  }

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

  button,
  .btn {
    display: none;
  }
}

/* High contrast mode */
@media (prefers-contrast: high) {
  :root {
    --border-color: rgba(255, 255, 255, 0.3);
    --text-secondary: #ffffff;
  }

  button,
  .btn {
    border: 2px solid currentColor;
  }
}

/* Animation classes */
.fade-in {
  animation: fadeIn 0.5s ease-in-out;
}

.slide-up {
  animation: slideUp 0.5s ease-out;
}

.scale-in {
  animation: scaleIn 0.3s ease-out;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.9);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}