/* ==========================================================================
   Design Tokens & Root Variables
   ========================================================================== */
:root {
  --bg-main: #0a0b12;
  --bg-gradient: radial-gradient(circle at center, #121424 0%, #06070c 100%);
  
  --primary: #4f46e5;
  --primary-glow: rgba(79, 70, 229, 0.4);
  --primary-hover: #6366f1;
  
  --secondary: #9333ea;
  --secondary-glow: rgba(147, 51, 234, 0.4);
  
  --success: #10b981;
  --success-glow: rgba(16, 185, 129, 0.2);
  
  --error: #ef4444;
  --error-glow: rgba(239, 68, 68, 0.15);
  
  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #64748b;
  
  --glass-bg: rgba(18, 20, 38, 0.5);
  --glass-border: rgba(255, 255, 255, 0.06);
  --glass-border-focus: rgba(99, 102, 241, 0.35);
  --glass-shadow: 0 16px 40px 0 rgba(0, 0, 0, 0.5);
  --glass-blur: 16px;
  
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background-color: var(--bg-main);
  background-image: var(--bg-gradient);
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  overflow-x: hidden;
  position: relative;
  line-height: 1.5;
}

/* ==========================================================================
   Glowing Ambient Background
   ========================================================================== */
.bg-glow {
  position: absolute;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  filter: blur(120px);
  z-index: 0;
  opacity: 0.45;
  pointer-events: none;
  animation: floatGlow 15s ease-in-out infinite alternate;
}

.bg-glow-1 {
  background: radial-gradient(circle, var(--primary-glow) 0%, transparent 70%);
  top: -10%;
  left: -10%;
}

.bg-glow-2 {
  background: radial-gradient(circle, var(--secondary-glow) 0%, transparent 70%);
  bottom: -10%;
  right: -10%;
  animation-delay: -7s;
}

.bg-grid {
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 40px 40px;
  background-position: center;
  mask-image: radial-gradient(ellipse at center, black 40%, transparent 90%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 40%, transparent 90%);
  z-index: 0;
  pointer-events: none;
}

@keyframes floatGlow {
  0% {
    transform: translate(0, 0) scale(1);
  }
  100% {
    transform: translate(80px, 50px) scale(1.2);
  }
}

/* ==========================================================================
   Layout Container
   ========================================================================== */
.container {
  width: 100%;
  max-width: 680px;
  padding: 40px 20px;
  display: flex;
  flex-direction: column;
  gap: 30px;
  z-index: 1;
}

/* ==========================================================================
   Header Styles
   ========================================================================== */
.app-header {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.logo-area {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-icon {
  width: 38px;
  height: 38px;
  color: var(--primary-hover);
  filter: drop-shadow(0 0 10px var(--primary-glow));
}

.app-header h1 {
  font-family: 'Outfit', sans-serif;
  font-size: 2.2rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: var(--text-primary);
}

.app-header h1 span {
  background: linear-gradient(135deg, #a5b4fc 0%, #c084fc 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  font-weight: 500;
}

.subtitle {
  color: var(--text-secondary);
  font-size: 0.95rem;
  max-width: 500px;
  line-height: 1.6;
}

/* Status Badge */
.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-top: 5px;
  backdrop-filter: blur(5px);
}

.pulse-dot {
  width: 8px;
  height: 8px;
  background-color: var(--text-muted);
  border-radius: 50%;
  position: relative;
}

.pulse-dot.active {
  background-color: var(--success);
}

.pulse-dot.active::after {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  border: 4px solid var(--success);
  opacity: 0.4;
  animation: pulse 1.8s infinite;
}

.pulse-dot.error {
  background-color: var(--error);
}

@keyframes pulse {
  0% {
    transform: scale(0.6);
    opacity: 0.8;
  }
  100% {
    transform: scale(2);
    opacity: 0;
  }
}

/* ==========================================================================
   Glassmorphic Card Design
   ========================================================================== */
.glass-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 24px;
  padding: 40px;
  box-shadow: var(--glass-shadow);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  transition: border-color var(--transition-normal), transform var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.glass-card:hover {
  border-color: rgba(255, 255, 255, 0.1);
}

.card-title {
  font-family: 'Outfit', sans-serif;
  font-size: 1.4rem;
  font-weight: 600;
  margin-bottom: 6px;
}

.card-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 28px;
  line-height: 1.6;
}

.hidden {
  display: none !important;
}

/* ==========================================================================
   Form Controls & Styling
   ========================================================================== */
#extractor-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.input-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.input-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  letter-spacing: 0.5px;
}

.input-wrapper {
  position: relative;
  width: 100%;
}

.input-icon {
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  width: 20px;
  height: 20px;
  color: var(--text-muted);
  pointer-events: none;
  transition: color var(--transition-fast);
}

.form-input {
  width: 100%;
  padding: 14px 16px 14px 48px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.95rem;
  outline: none;
  transition: all var(--transition-normal);
}

.form-input::placeholder {
  color: var(--text-muted);
  opacity: 0.7;
}

.form-input:focus {
  background: rgba(255, 255, 255, 0.06);
  border-color: var(--glass-border-focus);
  box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.15);
}

.form-input:focus + .input-icon,
.input-wrapper:focus-within .input-icon {
  color: var(--primary-hover);
}

/* Password Toggle */
.password-toggle {
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color var(--transition-fast);
}

.password-toggle:hover {
  color: var(--text-primary);
}

.eye-icon {
  width: 20px;
  height: 20px;
}

/* Custom Validation States */
.form-input.invalid {
  border-color: rgba(239, 68, 68, 0.5);
  box-shadow: 0 0 0 4px rgba(239, 68, 68, 0.1);
}

.validation-message {
  font-size: 0.8rem;
  color: var(--error);
  margin-top: 2px;
  height: 18px;
  opacity: 0;
  transform: translateY(-4px);
  transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.validation-message.show {
  opacity: 1;
  transform: translateY(0);
}

/* =style-checkbox */
.form-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 5px;
}

.remember-checkbox-wrapper {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  user-select: none;
}

.styled-checkbox {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.checkbox-box {
  width: 20px;
  height: 20px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--glass-border);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-normal);
  position: relative;
}

.styled-checkbox:checked + .checkbox-box {
  background: var(--primary);
  border-color: var(--primary-hover);
  box-shadow: 0 0 8px var(--primary-glow);
}

.checkbox-box::after {
  content: '';
  position: absolute;
  width: 5px;
  height: 9px;
  border: solid white;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg) scale(0);
  margin-top: -2px;
  transition: transform var(--transition-fast) cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.styled-checkbox:checked + .checkbox-box::after {
  transform: rotate(45deg) scale(1);
}

.checkbox-label {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* Glowing Submit Button */
.submit-btn {
  position: relative;
  width: 100%;
  padding: 16px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  border: none;
  border-radius: 12px;
  color: white;
  font-family: inherit;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  overflow: hidden;
  margin-top: 10px;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  box-shadow: 0 4px 20px rgba(79, 70, 229, 0.3);
}

.submit-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 26px rgba(79, 70, 229, 0.5), 0 0 12px var(--secondary-glow);
}

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

.btn-glow {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transform: translateX(-100%);
  transition: transform 0.6s ease;
}

.submit-btn:hover .btn-glow {
  transform: translateX(100%);
}

/* ==========================================================================
   Loading & Progress Screen
   ========================================================================== */
#loading-card {
  align-items: center;
  text-align: center;
  padding: 50px 40px;
}

.spinner-container {
  margin-bottom: 24px;
  position: relative;
}

.double-spinner {
  width: 70px;
  height: 70px;
  border: 4px solid rgba(255, 255, 255, 0.03);
  border-top-color: var(--primary-hover);
  border-bottom-color: var(--secondary);
  border-radius: 50%;
  animation: spin 1.5s cubic-bezier(0.53, 0.21, 0.29, 0.87) infinite;
}

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

.loading-title {
  font-family: 'Outfit', sans-serif;
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: 30px;
}

/* Progress Steps UI */
.progress-steps {
  display: flex;
  flex-direction: column;
  gap: 16px;
  width: 100%;
  max-width: 360px;
  text-align: left;
  margin: 0 auto 30px;
}

.step {
  display: flex;
  align-items: center;
  gap: 12px;
  opacity: 0.4;
  transition: opacity var(--transition-normal);
}

.step-icon {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: 2px solid var(--text-muted);
  display: inline-block;
  position: relative;
  flex-shrink: 0;
  transition: all var(--transition-normal);
}

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

/* Active Step */
.step.active {
  opacity: 1;
}

.step.active .step-icon {
  border-color: var(--primary-hover);
  background-color: transparent;
}

.step.active .step-icon::after {
  content: '';
  position: absolute;
  inset: 3px;
  border-radius: 50%;
  background-color: var(--primary-hover);
  animation: pulseStep 1.2s infinite;
}

@keyframes pulseStep {
  0%, 100% { transform: scale(0.8); opacity: 0.6; }
  50% { transform: scale(1.1); opacity: 1; }
}

/* Completed Step */
.step.completed {
  opacity: 1;
}

.step.completed .step-icon {
  border-color: var(--success);
  background-color: var(--success);
}

.step.completed .step-icon::after {
  content: '';
  position: absolute;
  left: 5px;
  top: 2px;
  width: 4px;
  height: 7px;
  border: solid white;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

.step.completed .step-text {
  color: var(--text-primary);
  font-weight: 500;
}

/* Failed Step */
.step.failed {
  opacity: 1;
}

.step.failed .step-icon {
  border-color: var(--error);
  background-color: var(--error);
}

.step.failed .step-icon::after {
  content: '\00d7';
  color: white;
  font-size: 14px;
  font-weight: 700;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  line-height: 1;
}

.step.failed .step-text {
  color: var(--error);
}

/* Live Terminal Log */
.live-log {
  width: 100%;
  padding: 12px 18px;
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 10px;
  font-family: monospace;
  font-size: 0.8rem;
  color: var(--text-secondary);
  text-align: left;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ==========================================================================
   Success/Result Card Styling
   ========================================================================== */
.success-card {
  border-color: var(--success-glow);
  box-shadow: 0 16px 40px 0 rgba(0, 0, 0, 0.5), 0 0 12px var(--success-glow);
}

.success-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 28px;
}

.success-icon-wrapper {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--success-glow);
  border: 1.5px solid var(--success);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--success);
  flex-shrink: 0;
  box-shadow: 0 0 15px rgba(16, 185, 129, 0.3);
}

.success-icon {
  width: 24px;
  height: 24px;
}

.success-meta h3 {
  font-family: 'Outfit', sans-serif;
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--success);
}

.success-meta p {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* URL Result Box */
.result-box {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 24px;
}

.result-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  letter-spacing: 0.5px;
}

.url-container {
  display: flex;
  gap: 10px;
  width: 100%;
}

#subscribe-url-input {
  flex-grow: 1;
  padding: 14px 16px;
  background: rgba(0, 0, 0, 0.2);
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  color: var(--text-secondary);
  font-family: monospace;
  font-size: 0.9rem;
  outline: none;
  user-select: all;
  text-overflow: ellipsis;
}

.copy-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 20px;
  background: var(--primary);
  border: none;
  border-radius: 12px;
  color: white;
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-normal);
}

.copy-btn:hover {
  background: var(--primary-hover);
  box-shadow: 0 0 12px var(--primary-glow);
}

.copy-btn svg {
  width: 18px;
  height: 18px;
}

/* Copy Button Success State */
.copy-btn.copied {
  background: var(--success);
  box-shadow: 0 0 12px var(--success-glow);
}

/* Actions back button */
.result-actions {
  display: flex;
  justify-content: flex-start;
}

.back-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  border: 1px solid var(--glass-border);
  padding: 10px 18px;
  border-radius: 10px;
  color: var(--text-secondary);
  font-family: inherit;
  font-size: 0.85rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.back-btn:hover {
  border-color: rgba(255,255,255,0.15);
  color: var(--text-primary);
  background: rgba(255,255,255,0.02);
}

.back-btn svg {
  width: 16px;
  height: 16px;
}

/* ==========================================================================
   Footer Styles
   ========================================================================== */
.app-footer {
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-top: 10px;
}

.security-disclaimer {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  background: rgba(239, 68, 68, 0.03);
  border: 1px solid rgba(239, 68, 68, 0.1);
  padding: 16px 20px;
  border-radius: 16px;
  font-size: 0.8rem;
  color: var(--text-secondary);
  text-align: left;
  line-height: 1.6;
}

.security-disclaimer svg {
  width: 18px;
  height: 18px;
  color: var(--primary-hover);
  flex-shrink: 0;
  margin-top: 2px;
}

.security-disclaimer strong {
  color: var(--text-primary);
  font-weight: 600;
}

.copyright {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* ==========================================================================
   Responsive Adjustments
   ========================================================================== */
@media (max-width: 600px) {
  .container {
    padding: 20px 12px;
  }
  
  .glass-card {
    padding: 24px 16px;
  }
  
  .app-header h1 {
    font-size: 1.8rem;
  }
  
  .url-container {
    flex-direction: column;
  }
  
  .copy-btn {
    padding: 14px;
    justify-content: center;
  }
}