@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

:root {
  --bg-primary: #0a0a0f;
  --bg-secondary: #12121a;
  --bg-card: rgba(255, 255, 255, 0.04);
  --bg-card-hover: rgba(255, 255, 255, 0.07);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-border-hover: rgba(255, 255, 255, 0.15);
  --text-primary: #f0f0f5;
  --text-secondary: #8a8a9a;
  --text-muted: #5a5a6a;
  --accent-pink: #fe2c55;
  --accent-cyan: #25f4ee;
  --accent-blue: #3b82f6;
  --accent-purple: #8b5cf6;
  --gradient-primary: linear-gradient(135deg, #fe2c55, #8b5cf6, #25f4ee);
  --gradient-button: linear-gradient(135deg, #fe2c55, #d62a4e);
  --gradient-success: linear-gradient(135deg, #10b981, #059669);
  --gradient-error: linear-gradient(135deg, #ef4444, #dc2626);
  --shadow-glow: 0 0 30px rgba(254, 44, 85, 0.15);
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.3);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

/* Animated background */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: 
    radial-gradient(ellipse at 20% 20%, rgba(254, 44, 85, 0.08) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 80%, rgba(37, 244, 238, 0.06) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 50%, rgba(139, 92, 246, 0.04) 0%, transparent 50%);
  pointer-events: none;
  z-index: 0;
}

.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 40px 20px;
  position: relative;
  z-index: 1;
}

/* Header */
.header {
  text-align: center;
  margin-bottom: 40px;
  animation: fadeInDown 0.8s ease;
}

.header .logo {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.header .logo-icon {
  width: 48px;
  height: 48px;
  background: var(--gradient-primary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  box-shadow: var(--shadow-glow);
  animation: pulse-glow 3s ease-in-out infinite;
}

.header h1 {
  font-size: 32px;
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.5px;
}

.header p {
  color: var(--text-secondary);
  font-size: 15px;
  font-weight: 400;
  margin-top: 6px;
}

/* Glass Card */
.card {
  background: var(--bg-card);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  padding: 28px;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: var(--shadow-card);
  transition: var(--transition);
  animation: fadeInUp 0.8s ease;
}

.card:hover {
  border-color: var(--glass-border-hover);
}

/* Input Area */
.input-section {
  margin-bottom: 24px;
}

.input-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 10px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.input-label .icon {
  font-size: 16px;
}

.url-textarea {
  width: 100%;
  min-height: 180px;
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: 16px;
  color: var(--text-primary);
  font-family: 'Inter', monospace;
  font-size: 13px;
  line-height: 1.8;
  resize: vertical;
  transition: var(--transition);
  outline: none;
}

.url-textarea::placeholder {
  color: var(--text-muted);
}

.url-textarea:focus {
  border-color: var(--accent-pink);
  box-shadow: 0 0 0 3px rgba(254, 44, 85, 0.1);
}

/* URL Counter */
.url-counter {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 10px;
  font-size: 13px;
  color: var(--text-muted);
}

.url-counter .count {
  color: var(--accent-cyan);
  font-weight: 600;
}

/* Buttons */
.actions {
  display: flex;
  gap: 12px;
  margin-top: 20px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  border: none;
  border-radius: var(--radius-md);
  font-family: 'Inter', sans-serif;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.1), transparent);
  opacity: 0;
  transition: var(--transition);
}

.btn:hover::after {
  opacity: 1;
}

.btn-primary {
  background: var(--gradient-button);
  color: white;
  flex: 1;
  box-shadow: 0 4px 15px rgba(254, 44, 85, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 25px rgba(254, 44, 85, 0.4);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

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

.btn-secondary:hover {
  border-color: var(--glass-border-hover);
  background: var(--bg-card-hover);
}

.btn-success {
  background: var(--gradient-success);
  color: white;
  flex: 1;
  box-shadow: 0 4px 15px rgba(16, 185, 129, 0.3);
}

.btn-success:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 25px rgba(16, 185, 129, 0.4);
}

.btn-icon {
  padding: 14px;
  min-width: 48px;
}

/* Download Queue */
.queue-section {
  margin-top: 28px;
  animation: fadeInUp 0.8s ease 0.2s both;
}

.queue-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.queue-header h2 {
  font-size: 18px;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 8px;
}

.queue-stats {
  display: flex;
  gap: 16px;
  font-size: 13px;
}

.queue-stats .stat {
  display: flex;
  align-items: center;
  gap: 4px;
  color: var(--text-secondary);
}

.queue-stats .stat .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.dot-success { background: #10b981; }
.dot-downloading { background: var(--accent-cyan); animation: pulse 1.5s infinite; }
.dot-waiting { background: var(--text-muted); }
.dot-error { background: #ef4444; }

/* Queue Items */
.queue-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.queue-item {
  background: rgba(0, 0, 0, 0.2);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  display: flex;
  align-items: center;
  gap: 14px;
  transition: var(--transition);
  animation: slideIn 0.4s ease;
}

.queue-item:hover {
  background: rgba(0, 0, 0, 0.3);
  border-color: var(--glass-border-hover);
}

.queue-item-number {
  min-width: 28px;
  height: 28px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
}

.queue-item-info {
  flex: 1;
  min-width: 0;
}

.queue-item-url {
  font-size: 13px;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  font-weight: 500;
}

.queue-item-status {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 4px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.queue-item-title {
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Progress Bar */
.progress-container {
  width: 100%;
  height: 4px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 2px;
  margin-top: 8px;
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  border-radius: 2px;
  transition: width 0.3s ease;
  position: relative;
}

.progress-bar.downloading {
  background: linear-gradient(90deg, var(--accent-cyan), var(--accent-blue));
  box-shadow: 0 0 10px rgba(37, 244, 238, 0.3);
}

.progress-bar.complete {
  background: var(--gradient-success);
}

.progress-bar.error {
  background: var(--gradient-error);
}

.progress-bar.downloading::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
  animation: shimmer 1.5s infinite;
}

/* Status badges */
.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.3px;
  white-space: nowrap;
}

.status-waiting {
  background: rgba(90, 90, 106, 0.2);
  color: var(--text-muted);
}

.status-downloading {
  background: rgba(37, 244, 238, 0.1);
  color: var(--accent-cyan);
  animation: pulse 2s infinite;
}

.status-complete {
  background: rgba(16, 185, 129, 0.1);
  color: #10b981;
}

.status-error {
  background: rgba(239, 68, 68, 0.1);
  color: #ef4444;
}

/* Queue item actions */
.queue-item-actions {
  display: flex;
  gap: 6px;
}

.btn-download-single {
  padding: 6px 12px;
  background: rgba(16, 185, 129, 0.15);
  border: 1px solid rgba(16, 185, 129, 0.2);
  color: #10b981;
  border-radius: var(--radius-sm);
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  font-family: 'Inter', sans-serif;
}

.btn-download-single:hover {
  background: rgba(16, 185, 129, 0.25);
  border-color: rgba(16, 185, 129, 0.4);
}

/* Summary stats */
.summary-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-bottom: 20px;
  animation: fadeInUp 0.6s ease;
}

.summary-stat {
  background: rgba(0, 0, 0, 0.2);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: 16px;
  text-align: center;
}

.summary-stat .value {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 4px;
}

.summary-stat .label {
  font-size: 11px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.summary-stat.total .value { color: var(--text-primary); }
.summary-stat.complete .value { color: #10b981; }
.summary-stat.downloading .value { color: var(--accent-cyan); }
.summary-stat.failed .value { color: #ef4444; }

/* Spinner */
.spinner {
  width: 16px;
  height: 16px;
  border: 2px solid rgba(37, 244, 238, 0.2);
  border-top-color: var(--accent-cyan);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

/* Toast notifications */
.toast-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.toast {
  padding: 14px 20px;
  border-radius: var(--radius-md);
  font-size: 13px;
  font-weight: 500;
  backdrop-filter: blur(20px);
  animation: slideInRight 0.4s ease;
  display: flex;
  align-items: center;
  gap: 8px;
  max-width: 350px;
}

.toast-success {
  background: rgba(16, 185, 129, 0.15);
  border: 1px solid rgba(16, 185, 129, 0.3);
  color: #10b981;
}

.toast-error {
  background: rgba(239, 68, 68, 0.15);
  border: 1px solid rgba(239, 68, 68, 0.3);
  color: #ef4444;
}

.toast-info {
  background: rgba(37, 244, 238, 0.1);
  border: 1px solid rgba(37, 244, 238, 0.2);
  color: var(--accent-cyan);
}

/* Empty state */
.empty-state {
  text-align: center;
  padding: 48px 20px;
  color: var(--text-muted);
}

.empty-state .icon {
  font-size: 48px;
  margin-bottom: 16px;
  opacity: 0.5;
}

.empty-state p {
  font-size: 14px;
}

/* Hidden */
.hidden {
  display: none !important;
}

/* Animations */
@keyframes fadeInDown {
  from { opacity: 0; transform: translateY(-20px); }
  to { opacity: 1; transform: translateY(0); }
}

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

@keyframes slideIn {
  from { opacity: 0; transform: translateX(-10px); }
  to { opacity: 1; transform: translateX(0); }
}

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

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

@keyframes shimmer {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

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

@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 20px rgba(254, 44, 85, 0.2); }
  50% { box-shadow: 0 0 40px rgba(254, 44, 85, 0.4), 0 0 60px rgba(37, 244, 238, 0.1); }
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.2);
}

/* Responsive */
@media (max-width: 640px) {
  .container {
    padding: 20px 16px;
  }
  
  .header h1 {
    font-size: 24px;
  }
  
  .card {
    padding: 20px;
  }
  
  .summary-bar {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .actions {
    flex-direction: column;
  }
  
  .queue-item {
    flex-wrap: wrap;
  }
}