:root {
  --bg: #050508;
  --bg-sidebar: #0a0a0f;
  --surface: #0f0f1a;
  --surface-hover: #151525;
  --border: #1a1a2e;
  --border-focus: #303050;
  --text: #f5f5fa;
  --text-dim: #9494b8;
  --text-muted: #5c5c7d;
  --primary: #0066ff;
  --primary-hover: #1a75ff;
  --primary-glow: rgba(0, 102, 255, 0.4);
  --secondary: #6366f1;
  --danger: #ef4444;
  --success: #22c55e;
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
  --font: 'Inter', system-ui, -apple-system, sans-serif;
  --sidebar-width: 260px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
}

/* Layout */
.dashboard-layout {
  display: grid;
  grid-template-columns: var(--sidebar-width) 1fr;
  height: 100vh;
}

/* Sidebar */
.sidebar {
  background: var(--bg-sidebar);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  padding: 24px 16px;
}
.sidebar-header { margin-bottom: 40px; }
.logo { display: flex; align-items: center; gap: 12px; }
.logo-box {
  width: 32px;
  height: 32px;
  background: var(--primary);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  box-shadow: 0 0 15px var(--primary-glow);
}
.logo-text { font-size: 18px; font-weight: 800; letter-spacing: -0.02em; }
.logo-text span { color: var(--primary); }

.sidebar-nav { flex: 1; display: flex; flex-direction: column; gap: 4px; }
.nav-btn {
  display: flex; align-items: center; gap: 12px;
  padding: 10px 14px;
  background: transparent;
  border: none;
  border-radius: var(--radius-sm);
  color: var(--text-dim);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  text-align: left;
}
.nav-btn:hover { background: var(--surface); color: var(--text); }
.nav-btn.active { background: var(--primary); color: #fff; }
.nav-btn i { width: 18px; height: 18px; }

.sidebar-footer { padding-top: 20px; border-top: 1px solid var(--border); }
.user-pill {
  display: flex; align-items: center; gap: 12px;
  padding: 8px;
  border-radius: var(--radius-md);
  background: var(--surface);
}
.user-avatar {
  width: 32px; height: 32px;
  background: var(--border);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 12px;
}
.user-info { display: flex; flex-direction: column; }
.user-name { font-size: 13px; font-weight: 700; }
.user-status { font-size: 11px; color: var(--success); font-weight: 500; }

/* Main Content */
.main-content {
  overflow-y: auto;
  padding: 40px 60px;
  position: relative;
}

.view { display: none; max-width: 1100px; margin: 0 auto; animation: fadeIn 0.4s ease; }
.view.active { display: block; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

.view-header { margin-bottom: 32px; }
.view-header h1 { font-size: 28px; font-weight: 800; letter-spacing: -0.03em; margin-bottom: 4px; }
.view-header p { color: var(--text-dim); font-size: 15px; }
.header-flex { display: flex; align-items: flex-end; justify-content: space-between; }

/* Generator Grid */
.generator-grid {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 40px;
  align-items: start;
}

/* Config Sections */
.config-section {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 24px;
  transition: border-color 0.2s;
}
.config-section:hover { border-color: var(--border-focus); }
.section-head { display: flex; align-items: center; gap: 10px; margin-bottom: 20px; }
.section-head i { color: var(--primary); width: 20px; height: 20px; }
.section-head h3 { font-size: 16px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.05em; color: var(--text-dim); }

/* Tabs Minimal */
.tabs-minimal {
  display: flex; flex-wrap: wrap; gap: 8px;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}
.tab-min {
  padding: 6px 12px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-dim);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}
.tab-min:hover { border-color: var(--text-muted); color: var(--text); }
.tab-min.active { background: var(--primary); border-color: var(--primary); color: #fff; }

.tab-pane { display: none; }
.tab-pane.active { display: block; animation: fadeIn 0.3s ease; }

/* Inputs Pro */
.input-pro {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  color: var(--text);
  font-family: inherit;
  font-size: 14px;
  transition: all 0.2s;
}
.input-pro:focus { border-color: var(--primary); outline: none; box-shadow: 0 0 0 3px rgba(0, 102, 255, 0.15); }
.field-group { display: flex; gap: 8px; }
.field-group select { width: 140px; flex-shrink: 0; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-bottom: 12px; }

/* Dropzone */
.dropzone {
  border: 2px dashed var(--border);
  border-radius: var(--radius-md);
  padding: 30px;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s;
}
.dropzone:hover { border-color: var(--primary); background: rgba(0, 102, 255, 0.05); }
.dropzone i { width: 32px; height: 32px; color: var(--primary); margin-bottom: 12px; }
.dropzone p { font-weight: 600; font-size: 14px; }
.dropzone span { font-size: 12px; color: var(--text-muted); }

.upload-status { margin-top: 12px; }
.file-card {
  display: flex; align-items: center; gap: 12px;
  padding: 12px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
}
.file-card i { color: var(--primary); }
.file-details { flex: 1; display: flex; flex-direction: column; overflow: hidden; }
.file-details span { font-size: 13px; font-weight: 700; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.file-details span:last-child { font-size: 11px; color: var(--text-muted); font-weight: 500; }

/* Config Grid */
.config-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.field label { display: block; font-size: 12px; font-weight: 700; color: var(--text-muted); text-transform: uppercase; margin-bottom: 8px; }
.color-control {
  display: flex; align-items: center; gap: 10px;
  background: var(--bg);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}
.color-control input[type="color"] {
  border: none; background: none; width: 24px; height: 24px; cursor: pointer;
}
.color-control span { font-family: monospace; font-size: 13px; font-weight: 600; }

.logo-uploader { display: flex; align-items: center; gap: 16px; }
#logo-preview-wrap { display: flex; align-items: center; gap: 12px; }
#logo-preview-circle {
  width: 40px; height: 40px; border-radius: 50%; border: 2px solid var(--primary);
  background-size: cover; background-position: center;
}

.bg-selection { display: flex; gap: 8px; }
.bg-item {
  width: 36px; height: 36px; border-radius: 8px; cursor: pointer; border: 2px solid transparent; transition: all 0.2s;
}
.bg-item.active { border-color: var(--primary); transform: scale(1.1); }

/* Preview Card */
.generator-preview { position: sticky; top: 0; }
.preview-card {
  background: var(--bg-sidebar);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  text-align: center;
  box-shadow: var(--shadow);
  margin-bottom: 24px;
}
.preview-canvas-wrap {
  background: #fff;
  padding: 20px;
  border-radius: var(--radius-md);
  margin-bottom: 20px;
  position: relative;
  display: inline-block;
  line-height: 0;
}
#qr-canvas { max-width: 100%; height: auto; display: block; }
.preview-info { text-align: left; border-top: 1px solid var(--border); padding-top: 16px; }
.preview-info span { font-size: 11px; font-weight: 800; color: var(--primary); text-transform: uppercase; }
.preview-info p { font-size: 13px; color: var(--text-dim); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* Buttons */
.btn-primary {
  background: var(--primary); color: #fff; border: none; font-weight: 700;
  box-shadow: 0 4px 15px var(--primary-glow);
}
.btn-primary:hover { background: var(--primary-hover); transform: translateY(-1px); }
.btn-outline {
  background: transparent; color: var(--text); border: 1px solid var(--border); font-weight: 600;
}
.btn-outline:hover { background: var(--surface); border-color: var(--border-focus); }
.btn-secondary {
  background: var(--surface); color: var(--text-dim); border: 1px solid var(--border); font-weight: 600;
}
.btn-secondary:hover { color: var(--text); border-color: var(--border-focus); }
.btn-primary, .btn-outline, .btn-secondary {
  padding: 12px 20px; border-radius: var(--radius-sm); cursor: pointer; font-family: inherit; font-size: 14px;
  display: flex; align-items: center; justify-content: center; gap: 8px; transition: all 0.2s;
}
.btn-full { width: 100%; }
.action-stack { display: flex; flex-direction: column; gap: 10px; }
.btn-icon { background: none; border: none; color: var(--text-muted); cursor: pointer; padding: 4px; transition: color 0.2s; }
.btn-icon:hover { color: var(--danger); }
.btn-text-danger { background: none; border: none; color: var(--text-muted); font-size: 13px; font-weight: 600; cursor: pointer; }
.btn-text-danger:hover { color: var(--danger); }

/* Items Grid (History/Files) */
.items-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 20px;
}
.empty-state {
  grid-column: 1 / -1; text-align: center; padding: 60px; color: var(--text-muted);
}
.empty-state i { width: 48px; height: 48px; margin-bottom: 16px; opacity: 0.5; }

/* Utils */
.hidden { display: none !important; }
.mt-16 { margin-top: 16px; }

/* Toast */
.toast {
  position: fixed; bottom: 30px; right: 30px;
  background: var(--surface); border: 1px solid var(--primary);
  color: var(--text); padding: 12px 24px; border-radius: var(--radius-sm);
  font-size: 14px; font-weight: 600; box-shadow: var(--shadow);
  z-index: 1000; transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.toast.hidden { transform: translateY(100px); opacity: 0; }

/* Responsive */
@media (max-width: 1024px) {
  .dashboard-layout { grid-template-columns: 80px 1fr; }
  .sidebar { padding: 20px 8px; align-items: center; }
  .logo-text, .nav-btn span, .user-info { display: none; }
  .nav-btn { padding: 12px; justify-content: center; }
  .main-content { padding: 30px; }
  .generator-grid { grid-template-columns: 1fr; }
  .generator-preview { position: static; }
}