/* ==========================================================================
   AI Image Mixer & Sanitizer - Design System & Modern UI Styles
   ========================================================================== */

:root {
  --bg-primary: #080b11;
  --bg-secondary: #0f1523;
  --bg-card: rgba(18, 24, 38, 0.75);
  --bg-card-hover: rgba(26, 34, 53, 0.85);
  --bg-glass: rgba(15, 23, 42, 0.65);
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(99, 102, 241, 0.3);
  --border-focus: #6366f1;

  --accent-primary: #6366f1;
  --accent-secondary: #8b5cf6;
  --accent-gradient: linear-gradient(135deg, #6366f1 0%, #a855f7 50%, #ec4899 100%);
  --accent-gradient-hover: linear-gradient(135deg, #4f46e5 0%, #9333ea 50%, #db2777 100%);
  
  --emerald-glow: rgba(16, 185, 129, 0.2);
  --emerald: #10b981;
  --emerald-light: #34d399;
  
  --amber: #f59e0b;
  --rose: #f43f5e;
  
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  --shadow-card: 0 20px 40px -15px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(255, 255, 255, 0.05);
  --shadow-glow: 0 0 30px rgba(99, 102, 241, 0.25);
  --shadow-emerald: 0 0 25px rgba(16, 185, 129, 0.25);
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-main);
  min-height: 100vh;
  line-height: 1.5;
  overflow-x: hidden;
  position: relative;
  -webkit-font-smoothing: antialiased;
}

/* Background Atmosphere */
.ambient-glow-1 {
  position: fixed;
  top: -15%;
  left: 20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.15) 0%, rgba(99, 102, 241, 0) 70%);
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
  z-index: 0;
}

.ambient-glow-2 {
  position: fixed;
  bottom: -10%;
  right: 10%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(168, 85, 247, 0.12) 0%, rgba(168, 85, 247, 0) 70%);
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
  z-index: 0;
}

.app-wrapper {
  position: relative;
  z-index: 1;
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px 20px 60px;
  display: flex;
  flex-direction: column;
  gap: 32px;
}

/* Header */
.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 24px;
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  text-decoration: none;
  color: inherit;
}

.brand-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: var(--accent-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 20px rgba(99, 102, 241, 0.4);
  color: #fff;
}

.brand-title {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  background: linear-gradient(to right, #ffffff, #cbd5e1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  background: rgba(99, 102, 241, 0.15);
  color: #a5b4fc;
  border: 1px solid rgba(99, 102, 241, 0.3);
  margin-left: 8px;
  letter-spacing: 0.05em;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.status-pill {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid var(--border-subtle);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-muted);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--emerald);
  box-shadow: 0 0 8px var(--emerald);
  animation: pulse-dot 2s infinite ease-in-out;
}

.status-dot.offline {
  background: var(--rose);
  box-shadow: 0 0 8px var(--rose);
  animation: none;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.85); }
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-1px);
}

.btn-secondary.active {
  background: rgba(99, 102, 241, 0.2);
  border-color: var(--accent-primary);
  color: #a5b4fc;
}

/* Hero Section */
.hero {
  text-align: center;
  max-width: 720px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.hero h1 {
  font-size: 2.5rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
}

.gradient-text {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero p {
  color: var(--text-muted);
  font-size: 1.05rem;
}

/* Feature Badges Bar */
.pipeline-features {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-top: 4px;
}

.feature-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-subtle);
  font-size: 0.75rem;
  color: var(--text-muted);
}

.feature-tag svg {
  color: var(--emerald-light);
}

/* Main Container Grid */
.main-card {
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Tabs Navigation */
.tabs-header {
  display: flex;
  border-bottom: 1px solid var(--border-subtle);
  background: rgba(10, 15, 26, 0.5);
}

.tab-btn {
  flex: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 16px 20px;
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--text-muted);
  font-size: 0.92rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.tab-btn:hover {
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.02);
}

.tab-btn.active {
  color: #fff;
  border-bottom-color: var(--accent-primary);
  background: rgba(99, 102, 241, 0.08);
}

/* Tab Panels */
.tab-content {
  padding: 32px;
}

.tab-pane {
  display: none;
}

.tab-pane.active {
  display: block;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Dropzone */
.dropzone {
  border: 2px dashed rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-md);
  padding: 48px 24px;
  text-align: center;
  background: rgba(255, 255, 255, 0.015);
  cursor: pointer;
  transition: all 0.25s ease;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  position: relative;
}

.dropzone:hover, .dropzone.dragover {
  border-color: var(--accent-primary);
  background: rgba(99, 102, 241, 0.06);
  box-shadow: 0 0 35px rgba(99, 102, 241, 0.15);
  transform: scale(1.005);
}

.dropzone-icon-box {
  width: 68px;
  height: 68px;
  border-radius: 50%;
  background: rgba(99, 102, 241, 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #a5b4fc;
  border: 1px solid rgba(99, 102, 241, 0.25);
  box-shadow: 0 0 20px rgba(99, 102, 241, 0.2);
  transition: all 0.25s ease;
}

.dropzone:hover .dropzone-icon-box {
  transform: translateY(-4px) scale(1.05);
  background: rgba(99, 102, 241, 0.25);
}

.dropzone-title {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-main);
}

.dropzone-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  max-width: 360px;
}

.dropzone-hint {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.75rem;
  color: var(--text-dim);
  background: rgba(255, 255, 255, 0.03);
  padding: 4px 10px;
  border-radius: var(--radius-full);
}

.file-input-hidden {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: pointer;
}

/* URL Tab Panel */
.url-form-group {
  display: flex;
  gap: 12px;
}

.input-box {
  flex: 1;
  background: rgba(10, 15, 26, 0.6);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 14px 18px;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  color: #fff;
  transition: all 0.2s ease;
  outline: none;
}

.input-box:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.25);
  background: rgba(10, 15, 26, 0.9);
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 28px;
  border-radius: var(--radius-md);
  background: var(--accent-gradient);
  border: none;
  color: #fff;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: 0 4px 15px rgba(99, 102, 241, 0.35);
  white-space: nowrap;
}

.btn-primary:hover {
  background: var(--accent-gradient-hover);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(99, 102, 241, 0.5);
}

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

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

/* Presets Tab Panel */
.presets-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
}

.preset-card {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-subtle);
  background: rgba(10, 15, 26, 0.6);
  cursor: pointer;
  transition: all 0.25s ease;
  display: flex;
  flex-direction: column;
}

.preset-card:hover {
  border-color: var(--accent-primary);
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(99, 102, 241, 0.25);
}

.preset-img-wrapper {
  width: 100%;
  height: 120px;
  overflow: hidden;
  background: #111;
}

.preset-img-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.preset-card:hover .preset-img-wrapper img {
  transform: scale(1.08);
}

.preset-label {
  padding: 10px 12px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-main);
  text-align: center;
  border-top: 1px solid var(--border-subtle);
}

/* Processing Overlay / Loading State */
.processing-overlay {
  display: none;
  padding: 48px 24px;
  text-align: center;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 24px;
}

.processing-overlay.active {
  display: flex;
  animation: fadeIn 0.3s ease;
}

.spinner-ring {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  border: 4px solid rgba(99, 102, 241, 0.15);
  border-top-color: var(--accent-primary);
  border-right-color: var(--accent-secondary);
  animation: spin 0.9s cubic-bezier(0.68, -0.55, 0.265, 1.55) infinite;
  box-shadow: 0 0 25px rgba(99, 102, 241, 0.3);
}

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

.progress-steps-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-width: 320px;
  width: 100%;
  text-align: left;
}

.progress-step-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.82rem;
  color: var(--text-dim);
  transition: all 0.2s ease;
}

.progress-step-item.active {
  color: #fff;
  font-weight: 500;
}

.progress-step-item.done {
  color: var(--emerald-light);
}

/* Results Section */
.results-section {
  display: none;
  flex-direction: column;
  gap: 24px;
  animation: fadeIn 0.4s ease;
}

.results-section.active {
  display: flex;
}

/* Compare View Container */
.comparison-container {
  position: relative;
  width: 100%;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: #000;
  border: 1px solid var(--border-subtle);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.6);
  user-select: none;
  -webkit-user-select: none;
  aspect-ratio: 16 / 9;
  max-height: 520px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.comparison-wrapper {
  position: relative;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

.img-compare-item {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
  pointer-events: none;
}

.img-before-wrapper {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  clip-path: polygon(0 0, 50% 0, 50% 100%, 0 100%);
  transition: clip-path 0.05s ease;
}

.comparison-slider-bar {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 2px;
  background: #fff;
  box-shadow: 0 0 12px rgba(255, 255, 255, 0.8);
  cursor: ew-resize;
  z-index: 10;
  transform: translateX(-50%);
}

.comparison-slider-handle {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: #ffffff;
  color: #0f172a;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 15px rgba(0, 0, 0, 0.5), 0 0 0 3px rgba(99, 102, 241, 0.5);
  cursor: ew-resize;
  font-size: 0.9rem;
}

.compare-badge {
  position: absolute;
  top: 14px;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(8px);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  z-index: 5;
  border: 1px solid rgba(255, 255, 255, 0.15);
  pointer-events: none;
}

.badge-before {
  left: 14px;
  color: #fca5a5;
  border-color: rgba(244, 63, 94, 0.3);
}

.badge-after {
  right: 14px;
  color: #6ee7b7;
  border-color: rgba(16, 185, 129, 0.3);
}

/* View Mode Switcher */
.view-modes-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.view-mode-pills {
  display: flex;
  background: rgba(15, 23, 42, 0.8);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 4px;
}

.mode-pill {
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-size: 0.8rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
}

.mode-pill.active {
  background: rgba(99, 102, 241, 0.2);
  color: #fff;
}

/* Side by Side Alternative View */
.side-by-side-container {
  display: none;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.side-by-side-container.active {
  display: grid;
}

.side-box {
  position: relative;
  background: #000;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-subtle);
  height: 360px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.side-box img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

/* Metrics & Stats Card */
.metrics-card {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  background: rgba(10, 15, 26, 0.5);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 20px;
}

.metric-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.metric-label {
  font-size: 0.75rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
}

.metric-value {
  font-size: 1.15rem;
  font-weight: 700;
  color: #fff;
  font-family: var(--font-mono);
}

.metric-value.highlight {
  color: var(--emerald-light);
}

/* Clean URL Bar */
.url-output-group {
  display: flex;
  gap: 10px;
}

.url-output-box {
  flex: 1;
  background: rgba(10, 15, 26, 0.7);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: #93c5fd;
  outline: none;
}

/* Result Actions */
.result-actions-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: flex-end;
}

/* History Drawer / Session Tray */
.history-section {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-card);
}

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

.history-title {
  font-size: 1rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
}

.history-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
  gap: 12px;
}

.history-item {
  position: relative;
  aspect-ratio: 1;
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid var(--border-subtle);
  cursor: pointer;
  transition: all 0.2s ease;
  background: #000;
}

.history-item:hover {
  border-color: var(--accent-primary);
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
}

.history-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.history-empty {
  color: var(--text-dim);
  font-size: 0.85rem;
  grid-column: 1 / -1;
  text-align: center;
  padding: 24px;
}

/* Modal for API Key Settings */
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 20px;
}

.modal-backdrop.active {
  display: flex;
  animation: fadeIn 0.2s ease;
}

.modal-card {
  background: #111827;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  max-width: 480px;
  width: 100%;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.7);
  overflow: hidden;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 24px;
  border-bottom: 1px solid var(--border-subtle);
}

.modal-title {
  font-size: 1.15rem;
  font-weight: 700;
}

.btn-close {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 1.2rem;
}

.btn-close:hover {
  color: #fff;
}

.modal-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.modal-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  background: rgba(0, 0, 0, 0.2);
}

/* Toast Notifications */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  z-index: 2000;
}

.toast {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 18px;
  border-radius: var(--radius-md);
  background: rgba(15, 23, 42, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-subtle);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
  font-size: 0.88rem;
  color: #fff;
  animation: slideIn 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes slideIn {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

.toast.success {
  border-left: 4px solid var(--emerald);
}

.toast.error {
  border-left: 4px solid var(--rose);
}

.toast.info {
  border-left: 4px solid var(--accent-primary);
}

/* Login Screen Styles */
.login-wrapper {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: calc(100vh - 160px);
  padding: 20px;
  animation: fadeIn 0.4s ease;
}

.login-card {
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: 0 25px 60px -15px rgba(0, 0, 0, 0.7), 0 0 40px rgba(99, 102, 241, 0.15);
  max-width: 440px;
  width: 100%;
  padding: 40px 36px;
  display: flex;
  flex-direction: column;
  gap: 28px;
  position: relative;
  overflow: hidden;
}

.login-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--accent-gradient);
}

.login-header {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.login-icon-box {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  background: var(--accent-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  box-shadow: 0 0 25px rgba(99, 102, 241, 0.4);
}

.login-title {
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.login-subtitle {
  font-size: 0.88rem;
  color: var(--text-muted);
}

.login-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

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

.form-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-main);
  display: flex;
  justify-content: space-between;
}

.input-with-icon {
  position: relative;
  display: flex;
  align-items: center;
}

.input-icon {
  position: absolute;
  left: 14px;
  color: var(--text-dim);
  pointer-events: none;
}

.input-with-icon .input-box {
  padding-left: 44px;
  width: 100%;
}

.login-error-msg {
  display: none;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  background: rgba(244, 63, 94, 0.12);
  border: 1px solid rgba(244, 63, 94, 0.3);
  color: #fda4af;
  font-size: 0.82rem;
  align-items: center;
  gap: 8px;
}

.login-error-msg.active {
  display: flex;
  animation: shake 0.4s ease;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20%, 60% { transform: translateX(-6px); }
  40%, 80% { transform: translateX(6px); }
}

.user-profile-badge {
  display: none;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border-radius: var(--radius-full);
  background: rgba(99, 102, 241, 0.12);
  border: 1px solid rgba(99, 102, 241, 0.25);
  font-size: 0.82rem;
  font-weight: 600;
  color: #c7d2fe;
}

.user-profile-badge.active {
  display: flex;
}

.btn-logout {
  display: none;
}

.btn-logout.active {
  display: inline-flex;
}

/* Responsive adjustments */
@media (max-width: 768px) {
  .app-wrapper {
    padding: 16px 12px 40px;
    gap: 20px;
  }

  .header {
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
  }

  .header-actions {
    width: 100%;
    justify-content: space-between;
  }

  .hero h1 {
    font-size: 1.85rem;
  }

  .tab-content {
    padding: 20px 14px;
  }

  .url-form-group {
    flex-direction: column;
  }

  .comparison-container {
    height: 280px;
  }

  .side-by-side-container {
    grid-template-columns: 1fr;
  }

  .side-box {
    height: 240px;
  }

  .result-actions-bar {
    flex-direction: column;
  }

  .result-actions-bar button, .result-actions-bar a {
    width: 100%;
  }
}