/* Responsive Email Preview — style.css */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  --bg: #0B0E18;
  --bg-card: rgba(16, 22, 40, 0.85);
  --surface: rgba(30, 42, 70, 0.6);
  --border: rgba(100, 120, 160, 0.15);
  --text: #E8ECF4;
  --text-dim: #8892A8;
  --text-muted: #5A6480;
  --primary: #6366F1;
  --primary-dim: rgba(99, 102, 241, 0.15);
  --accent: #F59E0B;
  --success: #4ADE80;
  --warning: #FBBF24;
  --danger: #EF4444;
  --radius: 12px;
  --radius-sm: 8px;
  --glass: rgba(15, 22, 40, 0.7);
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  /* Client colors */
  --gmail: #EA4335;
  --outlook: #0078D4;
  --apple: #A2AAAD;
  --yahoo: #6001D2;
}

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

body {
  font-family: 'Inter', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

/* Header */
.header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 24px;
  background: var(--glass);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 100;
}
.header-left { display: flex; align-items: center; gap: 12px; }
.logo {
  width: 36px; height: 36px;
  background: linear-gradient(135deg, var(--primary), #818CF8);
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  font-size: 18px;
}
.header h1 {
  font-size: 16px; font-weight: 600;
  background: linear-gradient(135deg, var(--primary), #A5B4FC);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.header-actions { display: flex; gap: 8px; }

/* Buttons */
.btn {
  padding: 7px 14px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  font-family: 'Inter', sans-serif;
  font-size: 12px; font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  display: inline-flex; align-items: center; gap: 6px;
  white-space: nowrap;
}
.btn:hover { background: rgba(50, 65, 100, 0.6); border-color: var(--primary); }
.btn-primary { background: linear-gradient(135deg, var(--primary), #4F46E5); border-color: transparent; color: #fff; }
.btn-primary:hover { filter: brightness(1.15); }
.btn.active { background: var(--primary-dim); border-color: var(--primary); color: var(--primary); }
.btn-sm { padding: 5px 10px; font-size: 11px; }

/* Layout */
.app-container { display: flex; height: calc(100vh - 61px); }

/* Editor Panel */
.editor-panel {
  width: 400px; min-width: 300px;
  background: var(--glass);
  backdrop-filter: blur(20px);
  border-right: 1px solid var(--border);
  display: flex; flex-direction: column;
  overflow: hidden;
}
.editor-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
}
.editor-header h3 {
  font-size: 12px; font-weight: 600;
  text-transform: uppercase; letter-spacing: 1px;
  color: var(--text-dim);
}
.editor-tabs { display: flex; gap: 2px; }
.editor-tab {
  padding: 5px 10px; font-size: 11px; font-weight: 500;
  border: 1px solid transparent; border-radius: 6px;
  background: transparent; color: var(--text-dim);
  cursor: pointer; transition: var(--transition);
  font-family: 'Inter', sans-serif;
}
.editor-tab:hover { color: var(--text); }
.editor-tab.active { background: var(--primary-dim); border-color: var(--primary); color: var(--primary); }

.editor-body { flex: 1; display: flex; flex-direction: column; overflow: hidden; }
#htmlEditor {
  flex: 1; width: 100%;
  padding: 16px;
  background: transparent;
  border: none; outline: none;
  color: var(--text);
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px; line-height: 1.6;
  resize: none;
}
#htmlEditor::placeholder { color: var(--text-muted); }

.editor-footer {
  padding: 10px 16px;
  border-top: 1px solid var(--border);
  display: flex; gap: 6px; align-items: center; flex-wrap: wrap;
}

/* Upload area */
.upload-zone {
  padding: 20px;
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
  color: var(--text-dim);
  font-size: 13px;
  margin: 16px;
  display: none;
}
.upload-zone:hover { border-color: var(--primary); color: var(--primary); }
.upload-zone.active { display: block; }

/* Preview Panel */
.preview-panel { flex: 1; overflow-y: auto; padding: 20px; }

/* Controls bar */
.preview-controls {
  display: flex; align-items: center; gap: 12px;
  margin-bottom: 16px; flex-wrap: wrap;
}
.width-slider {
  display: flex; align-items: center; gap: 8px;
}
.width-slider input[type="range"] {
  -webkit-appearance: none;
  width: 160px; height: 4px;
  background: var(--surface);
  border-radius: 2px;
  outline: none;
}
.width-slider input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px; height: 16px;
  background: var(--primary);
  border-radius: 50%;
  cursor: pointer;
}
.width-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px; color: var(--text-dim);
  min-width: 50px;
}

/* Client tiles */
.preview-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 16px;
}

.client-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: var(--transition);
  cursor: pointer;
}
.client-card:hover { border-color: var(--primary); transform: translateY(-2px); }
.client-card.expanded {
  grid-column: 1 / -1;
  position: relative;
}

.client-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
}
.client-info { display: flex; align-items: center; gap: 8px; }
.client-dot {
  width: 8px; height: 8px; border-radius: 50%;
}
.client-name { font-size: 13px; font-weight: 600; }
.client-type { font-size: 10px; color: var(--text-muted); }

.client-badges { display: flex; gap: 4px; }
.badge {
  font-size: 9px; padding: 2px 6px;
  border-radius: 10px;
  font-weight: 600;
}
.badge-warn { background: rgba(245, 158, 11, 0.15); color: var(--warning); }
.badge-ok { background: rgba(74, 222, 128, 0.15); color: var(--success); }
.badge-err { background: rgba(239, 68, 68, 0.15); color: var(--danger); }

.client-preview {
  height: 280px;
  overflow: hidden;
  background: #fff;
  position: relative;
}
.client-card.expanded .client-preview { height: 600px; }

.client-preview iframe {
  width: 100%; height: 100%;
  border: none;
  transform-origin: top left;
}

/* Warnings panel */
.warnings-panel {
  padding: 10px 14px;
  border-top: 1px solid var(--border);
  max-height: 120px;
  overflow-y: auto;
}
.warning-item {
  font-size: 11px;
  padding: 4px 0;
  color: var(--text-dim);
  display: flex; align-items: flex-start; gap: 6px;
}
.warning-icon { flex-shrink: 0; }

/* CSS Support Matrix */
.matrix-panel {
  display: none;
  padding: 20px;
}
.matrix-panel.active { display: block; }
.matrix-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 12px;
}
.matrix-table th, .matrix-table td {
  padding: 8px 12px;
  border: 1px solid var(--border);
  text-align: center;
}
.matrix-table th {
  background: var(--surface);
  font-weight: 600; font-size: 11px;
  text-transform: uppercase;
  color: var(--text-dim);
}
.matrix-table td.supported { color: var(--success); }
.matrix-table td.partial { color: var(--warning); }
.matrix-table td.unsupported { color: var(--danger); }

/* Tools Panel */
.tools-section {
  padding: 12px 16px;
  border-top: 1px solid var(--border);
}
.tools-section h4 {
  font-size: 11px; font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-dim);
  margin-bottom: 8px;
}

/* Link list */
.link-list { font-size: 12px; }
.link-item {
  display: flex; align-items: center; gap: 6px;
  padding: 4px 0;
  color: var(--text-dim);
}
.link-item.valid { color: var(--success); }
.link-item.invalid { color: var(--danger); }

/* Toast */
.toast {
  position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%) translateY(20px);
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-sm);
  padding: 10px 20px; font-size: 13px; color: var(--text);
  opacity: 0; transition: all 0.3s ease; z-index: 200; pointer-events: none;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* Scrollbar */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--surface); border-radius: 3px; }

/* Responsive */
@media (max-width: 900px) {
  .app-container { flex-direction: column; }
  .editor-panel { width: 100%; min-width: unset; max-height: 40vh; border-right: none; border-bottom: 1px solid var(--border); }
  .preview-grid { grid-template-columns: 1fr; }
}