/* CSS Variables */
:root {
  --primary-color: #FE2C55;
  --primary-hover: #E62548;
  --secondary-color: #25F4EE;
  --bg-color: #ffffff;
  --card-bg: #f5f5f5;
  --card-bg-light: #ffffff;
  --text-primary: #333333;
  --text-secondary: #666666;
  --border-color: #e0e0e0;
  --success-color: #52c41a;
  --error-color: #ff4d4f;
  --warning-color: #faad14;
  --gradient-start: #FE2C55;
  --gradient-end: #FF6B8A;
  --shadow-color: rgba(254, 44, 85, 0.3);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
}

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

/* Container */
.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 20px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Header */
.header {
  padding: 24px 0;
  display: flex;
  justify-content: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 24px;
  font-weight: 700;
}

.logo-icon {
  font-size: 32px;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.1); }
}

.logo-text {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Main */
.main {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 32px;
  padding-bottom: 40px;
}

/* Hero */
.hero {
  text-align: center;
  padding: 20px 0;
}

.hero-title {
  font-size: 36px;
  font-weight: 700;
  margin-bottom: 12px;
  background: linear-gradient(135deg, var(--text-primary), var(--text-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 16px;
  color: var(--text-secondary);
}

/* Input Section */
.input-section {
  display: flex;
  justify-content: center;
}

.input-card {
  background: var(--card-bg);
  border-radius: 20px;
  padding: 32px;
  width: 100%;
  max-width: 600px;
  border: 1px solid var(--border-color);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.input-wrapper {
  position: relative;
  margin-bottom: 20px;
}

.url-input {
  width: 100%;
  padding: 16px 52px 16px 20px;
  font-size: 16px;
  background: var(--card-bg-light);
  border: 2px solid var(--border-color);
  border-radius: 12px;
  color: var(--text-primary);
  outline: none;
  transition: var(--transition);
}

.url-input::placeholder {
  color: var(--text-secondary);
}

.url-input:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px var(--shadow-color);
}

.paste-btn {
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  background: transparent;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 8px;
  border-radius: 8px;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
}

.paste-btn:hover {
  background: var(--border-color);
  color: var(--text-primary);
}

.parse-btn {
  width: 100%;
  padding: 16px 32px;
  font-size: 16px;
  font-weight: 600;
  color: white;
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  border: none;
  border-radius: 12px;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.parse-btn:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 10px 30px var(--shadow-color);
}

.parse-btn:disabled {
  opacity: 0.7;
  cursor: not-allowed;
}

.btn-loading {
  display: flex;
  align-items: center;
  gap: 8px;
}

.spinner {
  animation: spin 1s linear infinite;
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* Error Message */
.error-message {
  background: rgba(255, 77, 79, 0.1);
  border: 1px solid var(--error-color);
  border-radius: 12px;
  padding: 16px;
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--error-color);
  animation: shake 0.5s ease-in-out;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-5px); }
  75% { transform: translateX(5px); }
}

/* Result Section */
.result-section {
  animation: fadeInUp 0.5s ease-out;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.result-card {
  background: var(--card-bg);
  border-radius: 20px;
  padding: 24px;
  border: 1px solid var(--border-color);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.result-header {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--success-color);
  font-weight: 600;
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-color);
}

.success-icon {
  animation: checkmark 0.5s ease-out;
}

@keyframes checkmark {
  0% { transform: scale(0); }
  50% { transform: scale(1.2); }
  100% { transform: scale(1); }
}

/* Video Info */
.video-info {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 20px;
  margin-bottom: 24px;
}

.video-preview {
  position: relative;
  border-radius: 12px;
  overflow: hidden;
  aspect-ratio: 9/16;
  background: var(--card-bg-light);
}

.video-preview img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.video-duration {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(0, 0, 0, 0.8);
  padding: 4px 8px;
  border-radius: 4px;
  font-size: 12px;
  font-weight: 500;
}

.play-btn {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 60px;
  height: 60px;
  background: rgba(254, 44, 85, 0.9);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  transition: var(--transition);
  backdrop-filter: blur(4px);
}

.play-btn:hover {
  transform: translate(-50%, -50%) scale(1.1);
  background: var(--primary-color);
}

.video-details {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.video-title {
  font-size: 18px;
  font-weight: 600;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.video-author {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-secondary);
}

.video-author img {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  object-fit: cover;
}

.video-stats {
  display: flex;
  gap: 16px;
  margin-top: auto;
  padding-top: 12px;
}

.stat-item {
  color: var(--text-secondary);
  font-size: 14px;
}

/* Action Buttons */
.action-buttons {
  display: flex;
  gap: 12px;
  margin-bottom: 16px;
}

.action-btn {
  flex: 1;
  padding: 14px 24px;
  font-size: 15px;
  font-weight: 600;
  border-radius: 10px;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  text-decoration: none;
  border: none;
}

.action-btn.primary {
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  color: white;
}

.action-btn.primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px var(--shadow-color);
}

.action-btn.secondary {
  background: var(--card-bg-light);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.action-btn.secondary:hover {
  background: var(--border-color);
}

.reset-btn {
  width: 100%;
  padding: 12px;
  font-size: 14px;
  color: var(--text-secondary);
  background: transparent;
  border: 1px dashed var(--border-color);
  border-radius: 10px;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.reset-btn:hover {
  color: var(--text-primary);
  border-color: var(--text-secondary);
}

/* Video Modal */
.video-modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.modal-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.9);
  backdrop-filter: blur(10px);
}

.modal-content {
  position: relative;
  max-width: 500px;
  width: 100%;
  z-index: 1001;
  animation: modalIn 0.3s ease-out;
}

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

.modal-close {
  position: absolute;
  top: -50px;
  right: 0;
  background: rgba(255, 255, 255, 0.1);
  border: none;
  color: white;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.modal-close:hover {
  background: rgba(255, 255, 255, 0.2);
}

.modal-content video {
  width: 100%;
  border-radius: 12px;
  display: block;
}

/* Instructions */
.instructions {
  margin-top: 20px;
}

.section-title {
  font-size: 20px;
  font-weight: 600;
  text-align: center;
  margin-bottom: 24px;
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.step {
  background: var(--card-bg);
  border-radius: 16px;
  padding: 24px;
  text-align: center;
  border: 1px solid var(--border-color);
  transition: var(--transition);
  position: relative;
}

.step:hover {
  transform: translateY(-4px);
  border-color: var(--primary-color);
}

.step-number {
  position: absolute;
  top: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 24px;
  height: 24px;
  background: var(--primary-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 700;
}

.step-icon {
  font-size: 32px;
  margin-bottom: 12px;
}

.step h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
}

.step p {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* Features */
.features {
  margin-top: 20px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.feature-item {
  background: var(--card-bg);
  border-radius: 12px;
  padding: 20px;
  text-align: center;
  border: 1px solid var(--border-color);
  transition: var(--transition);
}

.feature-item:hover {
  background: var(--card-bg-light);
}

.feature-icon {
  font-size: 28px;
  margin-bottom: 8px;
}

.feature-item h3 {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 4px;
}

.feature-item p {
  font-size: 12px;
  color: var(--text-secondary);
}

/* Footer */
.footer {
  padding: 24px 0;
  text-align: center;
  border-top: 1px solid var(--border-color);
  margin-top: auto;
}

.footer p {
  color: var(--text-secondary);
  font-size: 14px;
  margin-bottom: 4px;
}

.footer .disclaimer {
  font-size: 12px;
  opacity: 0.7;
}

/* Responsive Design */
@media (max-width: 768px) {
  .hero-title {
    font-size: 28px;
  }

  .input-card {
    padding: 24px;
  }

  .video-info {
    grid-template-columns: 1fr;
  }

  .video-preview {
    max-width: 200px;
    margin: 0 auto;
  }

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

  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  .hero-title {
    font-size: 24px;
  }

  .input-card {
    padding: 20px;
  }

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

  .modal-content {
    padding: 10px;
  }
}

/* Scrollbar Styling */
::-webkit-scrollbar {
  width: 8px;
}

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

::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 4px;
}

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

/* Selection */
::selection {
  background: var(--primary-color);
  color: white;
}