/* CSS Reset & Design Tokens for Ü45 / ADHD Friendly UX */
:root {
  color-scheme: light;
  
  --bg-main: #fafafa;
  --bg-card: #ffffff;
  --bg-input: #f1f5f9;
  --bg-hover: #e2e8f0;
  
  --text-primary: #0f172a;
  --text-secondary: #334155;
  --text-muted: #475569;
  
  --accent-primary: #2563eb;
  --accent-primary-hover: #1d4ed8;
  --accent-success: #059669;
  --accent-success-hover: #047857;
  --accent-cyan: #0891b2;
  --accent-danger: #dc2626;
  --accent-danger-hover: #b91c1c;
  --accent-warning: #d97706;
  
  --border-color: #e2e8f0;
  --border-focus: #2563eb;
  
  --shadow-main: 0 4px 20px -2px rgba(0, 0, 0, 0.06), 0 2px 6px -1px rgba(0, 0, 0, 0.04);
  --shadow-elevated: 0 10px 30px rgba(0, 0, 0, 0.08);
  
  --radius-lg: 18px;
  --radius-md: 12px;
  --radius-sm: 8px;
  
  --font-family: 'Outfit', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}



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

body {
  font-family: var(--font-family);
  background-color: var(--bg-main);
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 20px;
  font-size: 18px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.app-container {
  width: 100%;
  max-width: 660px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

/* Header */
.app-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 4px;
}

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

.logo-icon {
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-cyan));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.logo-text {
  display: flex;
  flex-direction: column;
}

.brand-name {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.brand-badge {
  font-size: 13px;
  color: var(--accent-cyan);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.security-badge {
  display: flex;
  align-items: center;
  gap: 8px;
  background-color: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.3);
  color: var(--accent-success);
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
}

.dot-pulse {
  width: 10px;
  height: 10px;
  background-color: var(--accent-success);
  border-radius: 50%;
  flex-shrink: 0;
}

/* Stepper */
.stepper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg-card);
  padding: 14px 20px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
}

.step {
  display: flex;
  align-items: center;
  gap: 8px;
  opacity: 0.45;
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.step.active {
  opacity: 1;
}

.step-num {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--bg-input);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 15px;
  border: 2px solid var(--border-color);
  transition: all 0.3s ease;
}

.step.active .step-num {
  background: var(--accent-primary);
  color: #fff;
  border-color: var(--accent-primary);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.35);
}

.step.completed .step-num {
  background: var(--accent-success);
  color: #fff;
  border-color: var(--accent-success);
}

.step-label {
  font-size: 15px;
  font-weight: 600;
}

.step-line {
  flex: 1;
  height: 2px;
  background-color: var(--border-color);
  margin: 0 8px;
  transition: background-color 0.3s ease;
}

.step-line.active {
  background-color: var(--accent-primary);
}

/* Main Card */
.main-card {
  background-color: var(--bg-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-main);
  padding: 32px;
  position: relative;
  overflow: hidden;
}

/* View Transitions API Customization */
::view-transition-old(root),
::view-transition-new(root) {
  animation-duration: 0.35s;
  animation-timing-function: cubic-bezier(0.16, 1, 0.3, 1);
}

.view-panel {
  display: none;
  flex-direction: column;
  gap: 24px;
}

.view-panel.active {
  display: flex;
  view-transition-name: active-panel;
}

/* Drag and Drop Zone */
.drop-zone {
  border: 3px dashed var(--border-color);
  border-radius: var(--radius-lg);
  padding: 48px 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  background-color: var(--bg-input);
  transition: all 0.25s ease;
  cursor: pointer;
}

.drop-zone:hover, .drop-zone.dragover {
  border-color: var(--accent-primary);
  background-color: rgba(37, 99, 235, 0.08);
  transform: translateY(-2px);
}

.file-input-hidden {
  display: none;
}

.upload-icon-wrapper {
  width: 80px;
  height: 80px;
  background: rgba(37, 99, 235, 0.12);
  color: var(--accent-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.headline {
  font-size: 26px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.subtext {
  font-size: 16px;
  color: var(--text-secondary);
  margin-bottom: 24px;
}

/* Buttons */
.btn-primary {
  background: linear-gradient(135deg, var(--accent-primary), #1d4ed8);
  color: #ffffff;
  border: none;
  padding: 16px 32px;
  font-size: 18px;
  font-weight: 700;
  border-radius: var(--radius-md);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  min-height: 56px;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.35);
  transition: all 0.2s ease;
  width: 100%;
}

.btn-primary:hover {
  background: linear-gradient(135deg, #1d4ed8, #1e40af);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.45);
}

.btn-large {
  font-size: 20px;
  padding: 20px 36px;
}

.btn-secondary {
  background-color: var(--bg-input);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  padding: 12px 24px;
  font-size: 16px;
  font-weight: 600;
  border-radius: var(--radius-md);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: all 0.2s ease;
  width: 100%;
}

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

/* Abbrechen Button */
.btn-stop-global {
  background-color: rgba(239, 68, 68, 0.1);
  color: #f87171;
  border: 1px solid rgba(239, 68, 68, 0.25);
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.btn-stop-global:hover {
  background-color: #ef4444;
  color: #ffffff;
  border-color: #ef4444;
}

/* Peer Action Buttons & Status Tags */
.btn-peer-control, .btn-peer-promote, .btn-peer-kick {
  border: none;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: all 0.2s ease;
}

.btn-peer-control {
  background-color: rgba(255, 255, 255, 0.08);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-peer-control:hover {
  background-color: rgba(255, 255, 255, 0.15);
  border-color: var(--accent-primary);
}

.btn-peer-promote {
  background-color: rgba(16, 185, 129, 0.12);
  color: #34d399;
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.btn-peer-promote:hover {
  background-color: #10b981;
  color: #fff;
}

.btn-peer-kick {
  background-color: rgba(239, 68, 68, 0.12);
  color: #f87171;
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.btn-peer-kick:hover {
  background-color: #ef4444;
  color: #fff;
}

.peer-status-tag {
  font-size: 12px;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 999px;
  letter-spacing: 0.02em;
}

.peer-status-tag.waiting {
  background-color: rgba(245, 158, 11, 0.12);
  color: #fbbf24;
  border: 1px solid rgba(245, 158, 11, 0.25);
}

.peer-status-tag.transferring {
  background-color: rgba(14, 165, 233, 0.12);
  color: #38bdf8;
  border: 1px solid rgba(14, 165, 233, 0.25);
}

.peer-status-tag.paused {
  background-color: rgba(245, 158, 11, 0.18);
  color: #fde047;
  border: 1px solid rgba(245, 158, 11, 0.3);
}

.peer-status-tag.complete {
  background-color: rgba(16, 185, 129, 0.12);
  color: #34d399;
  border: 1px solid rgba(16, 185, 129, 0.25);
}

.peer-status-tag.disconnected {
  background-color: rgba(239, 68, 68, 0.12);
  color: #f87171;
  border: 1px solid rgba(239, 68, 68, 0.25);
}

/* File Card */
.file-card {
  display: flex;
  align-items: center;
  gap: 16px;
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  padding: 20px;
  border-radius: var(--radius-md);
}

.file-icon {
  font-size: 32px;
  width: 56px;
  height: 56px;
  flex-shrink: 0;
  background-color: rgba(37, 99, 235, 0.15);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
}

.file-details {
  flex: 1;
  min-width: 0;
  overflow: hidden;
}

.file-name {
  font-size: 17px;
  font-weight: 700;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  overflow-wrap: break-word;
  word-break: break-all;
}

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

/* Share Box & Copy Link */
.share-box {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.share-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-secondary);
}

.link-input-group {
  display: flex;
  gap: 10px;
}

.share-url-field {
  flex: 1;
  background-color: var(--bg-input);
  border: 2px solid var(--border-color);
  color: var(--accent-cyan);
  padding: 14px 18px;
  font-size: 16px;
  font-family: monospace;
  border-radius: var(--radius-md);
  outline: none;
}

.btn-copy {
  background-color: var(--accent-primary);
  color: #fff;
  border: none;
  padding: 0 24px;
  border-radius: var(--radius-md);
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  white-space: nowrap;
}

.btn-copy:active {
  transform: scale(0.94);
}

.btn-copy.copied {
  background-color: var(--accent-success);
  transform: scale(1.04);
}

/* Inactivity Auto-Stop Notice */
.auto-timeout-notice {
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  padding: 10px 16px;
  border-radius: var(--radius-md);
  font-size: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Multi-Peer Receivers List Section */
.peers-section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 10px;
}

.peers-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
}

.queue-config {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-secondary);
}

.queue-select {
  background-color: var(--bg-input);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  outline: none;
}

.queue-section-box {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.queue-section-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.queue-empty-text {
  font-size: 14px;
  color: var(--text-muted);
  font-style: italic;
  padding: 10px 0;
}

.peers-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.peer-card {
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: border-color 0.2s ease, transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.3s ease;
}

@starting-style {
  .peer-card {
    opacity: 0;
    transform: translateY(12px) scale(0.96);
  }
}

.peer-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.peer-info {
  display: flex;
  align-items: center;
  gap: 10px;
}

.peer-title {
  font-weight: 700;
  font-size: 15px;
  color: var(--text-primary);
}

.peer-actions-group {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Peer Action Buttons */
.btn-peer-control, .btn-peer-promote, .btn-peer-kick {
  border: none;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: all 0.2s ease;
}

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

.btn-peer-control:hover {
  background-color: var(--bg-hover);
  border-color: var(--accent-primary);
}

.btn-peer-promote {
  background-color: rgba(16, 185, 129, 0.2);
  color: var(--accent-success);
  border: 1px solid rgba(16, 185, 129, 0.4);
}

.btn-peer-promote:hover {
  background-color: var(--accent-success);
  color: #fff;
}

.btn-peer-kick {
  background-color: rgba(239, 68, 68, 0.15);
  color: #fca5a5;
  border: 1px solid rgba(239, 68, 68, 0.4);
}

.btn-peer-kick:hover {
  background-color: var(--accent-danger);
  color: #fff;
}

.peer-status-tag {
  font-size: 13px;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
}

.peer-status-tag.waiting {
  background-color: rgba(245, 158, 11, 0.15);
  color: var(--accent-warning);
}

.peer-status-tag.transferring {
  background-color: rgba(37, 99, 235, 0.2);
  color: var(--accent-cyan);
}

.peer-status-tag.paused {
  background-color: rgba(245, 158, 11, 0.25);
  color: #fbbf24;
}

.peer-status-tag.complete {
  background-color: rgba(16, 185, 129, 0.2);
  color: var(--accent-success);
}

.peer-status-tag.disconnected {
  background-color: rgba(239, 68, 68, 0.2);
  color: var(--accent-danger);
}

.peer-progress-track {
  width: 100%;
  height: 10px;
  background-color: var(--bg-main);
  border-radius: 999px;
  overflow: hidden;
}

.peer-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent-primary), var(--accent-cyan));
  width: 0%;
  transition: width 0.2s ease;
}

.peer-metrics {
  display: flex;
  justify-content: space-between;
  font-size: 14px;
  color: var(--text-secondary);
}

/* Alert Boxes */
.alert-box {
  background-color: rgba(239, 68, 68, 0.15);
  border: 1px solid rgba(239, 68, 68, 0.4);
  color: #fca5a5;
  padding: 16px 20px;
  border-radius: var(--radius-md);
  font-weight: 600;
  text-align: center;
}

.alert-box.hidden {
  display: none;
}

/* Waiting Indicator */
.status-waiting {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  background-color: rgba(234, 179, 8, 0.1);
  border: 1px solid rgba(234, 179, 8, 0.3);
  color: #facc15;
  padding: 16px 20px;
  border-radius: var(--radius-md);
  font-size: 16px;
  font-weight: 600;
}

.status-waiting.hidden {
  display: none;
}

.spinner-ring {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  display: inline-block;
  border: 3px solid rgba(250, 204, 21, 0.3);
  border-top-color: #facc15;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

/* Progress & Metrics */
.transfer-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.transfer-status-text {
  font-size: 20px;
  font-weight: 700;
}

.transfer-percentage {
  font-size: 28px;
  font-weight: 800;
  color: var(--accent-cyan);
}

.progress-bar-track {
  width: 100%;
  height: 20px;
  background-color: var(--bg-input);
  border-radius: 999px;
  overflow: hidden;
  border: 1px solid var(--border-color);
}

.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent-primary), var(--accent-cyan));
  border-radius: 999px;
  width: 0%;
  transition: width 0.2s ease-out;
}

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.metric-card {
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  padding: 14px;
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  gap: 4px;
  text-align: center;
}

.metric-label {
  font-size: 13px;
  color: var(--text-secondary);
  font-weight: 600;
  text-transform: uppercase;
}

.metric-value {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
}

/* Success Complete */
.success-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 20px 0;
}

.success-icon {
  width: 90px;
  height: 90px;
  background-color: rgba(16, 185, 129, 0.15);
  color: var(--accent-success);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

.security-note {
  font-size: 14px;
  color: var(--text-secondary);
  text-align: center;
}

/* Tor .onion Switch Banner */
.onion-banner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  background: linear-gradient(135deg, #115e59, #134e4a);
  border: 1px solid rgba(20, 184, 166, 0.35);
  color: #ccfbf1;
  padding: 14px 20px;
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.3);
}

.onion-banner:hover {
  background: linear-gradient(135deg, #134e4a, #0f3d3b);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.45);
}

.onion-icon {
  font-size: 22px;
}

.onion-text {
  flex: 1;
}

.onion-arrow {
  font-size: 20px;
  font-weight: 800;
}

/* Footer */
.app-footer {
  text-align: center;
  font-size: 14px;
  color: var(--text-muted);
}

/* Mobile Responsive */
@media (max-width: 580px) {
  .app-container {
    gap: 16px;
  }
  .main-card {
    padding: 20px;
  }
  .file-card {
    flex-direction: column;
    align-items: flex-start;
  }
  .btn-stop-global {
    width: 100%;
  }
  .link-input-group {
    flex-direction: column;
  }
  .btn-copy {
    padding: 16px;
    justify-content: center;
  }
  .metrics-grid {
    grid-template-columns: 1fr;
  }
}