:root {
  --background: 240 10% 3.9%;
  --foreground: 0 0% 98%;
  --card: 240 10% 3.9%;
  --card-foreground: 0 0% 98%;
  --popover: 240 10% 3.9%;
  --popover-foreground: 0 0% 98%;
  --primary: 0 0% 98%;
  --primary-foreground: 240 5.9% 10%;
  --secondary: 240 3.7% 15.9%;
  --secondary-foreground: 0 0% 98%;
  --muted: 240 3.7% 15.9%;
  --muted-foreground: 240 5% 64.9%;
  --accent: 240 3.7% 15.9%;
  --accent-foreground: 0 0% 98%;
  --destructive: 0 62.8% 30.6%;
  --destructive-foreground: 0 0% 98%;
  --border: 240 3.7% 15.9%;
  --input: 240 3.7% 15.9%;
  --ring: 240 4.9% 83.9%;
  --radius: 0.75rem;
}

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

body {
  background-color: hsl(var(--background));
  color: hsl(var(--foreground));
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  min-height: 100dvh;
  display: flex;
  justify-content: center;
  padding: 2rem 1rem;
}

.container {
  width: 100%;
  max-width: 600px;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.hidden {
  display: none !important;
}

/* Typography */
h1, h2, h3 {
  font-weight: 600;
  letter-spacing: -0.025em;
}

.text-muted {
  color: hsl(var(--muted-foreground));
}

.text-sm {
  font-size: 0.875rem;
}

.text-xs {
  font-size: 0.75rem;
}

/* Cards */
.card {
  background-color: hsl(var(--card));
  color: hsl(var(--card-foreground));
  border: 1px solid hsl(var(--border));
  border-radius: var(--radius);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}

.card-header {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
  padding: 1.5rem;
}

.card-title {
  font-size: 1.25rem;
  line-height: 1;
}

.card-description {
  font-size: 0.875rem;
  color: hsl(var(--muted-foreground));
}

.card-content {
  padding: 1.5rem;
  padding-top: 0;
}

/* Layout Utilities */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: 0.5rem; }
.gap-4 { gap: 1rem; }
.gap-6 { gap: 1.5rem; }
.w-full { width: 100%; }

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

/* Forms & Inputs */
.label {
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: 0.5rem;
  display: block;
}

.input {
  display: flex;
  height: 2.5rem;
  width: 100%;
  border-radius: calc(var(--radius) - 2px);
  border: 1px solid hsl(var(--input));
  background-color: transparent;
  padding: 0.5rem 0.75rem;
  font-size: 0.875rem;
  color: hsl(var(--foreground));
  transition: border-color 0.15s, box-shadow 0.15s;
}

.input:focus {
  outline: none;
  border-color: hsl(var(--ring));
  box-shadow: 0 0 0 1px hsl(var(--ring));
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: calc(var(--radius) - 2px);
  font-size: 0.875rem;
  font-weight: 500;
  height: 2.5rem;
  padding: 0 1rem;
  border: none;
  cursor: pointer;
  transition: all 0.15s;
  text-decoration: none;
}

.btn:focus {
  outline: none;
  box-shadow: 0 0 0 2px hsl(var(--background)), 0 0 0 4px hsl(var(--ring));
}

.btn-primary {
  background-color: hsl(var(--primary));
  color: hsl(var(--primary-foreground));
}

.btn-primary:hover {
  background-color: hsl(var(--primary) / 0.9);
}

.btn-secondary {
  background-color: hsl(var(--secondary));
  color: hsl(var(--secondary-foreground));
}

.btn-secondary:hover {
  background-color: hsl(var(--secondary) / 0.8);
}

.btn-ghost {
  background-color: transparent;
  color: hsl(var(--foreground));
}

.btn-ghost:hover {
  background-color: hsl(var(--accent));
  color: hsl(var(--accent-foreground));
}

.btn-sm {
  height: 2rem;
  padding: 0 0.75rem;
  font-size: 0.75rem;
}

/* Header */
.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.5rem;
}

.app-title {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.app-logo {
  width: 1.5rem;
  height: 1.5rem;
  background-color: hsl(var(--primary));
  border-radius: 0.375rem;
  display: flex;
  align-items: center;
  justify-content: center;
  color: hsl(var(--primary-foreground));
}

/* Stats */
.stat-card {
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.stat-label {
  font-size: 0.875rem;
  font-weight: 500;
  color: hsl(var(--muted-foreground));
}

.stat-value {
  font-size: 1.5rem;
  font-weight: 700;
}

/* Dropzone */
.drop-zone {
  border: 1px dashed hsl(var(--border));
  border-radius: var(--radius);
  padding: 3rem 1.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  cursor: pointer;
  transition: all 0.2s ease;
  background-color: hsl(var(--background) / 0.5);
}

.drop-zone:hover, .drop-zone.dragover {
  background-color: hsl(var(--accent) / 0.5);
  border-color: hsl(var(--ring));
}

.drop-icon {
  width: 2.5rem;
  height: 2.5rem;
  color: hsl(var(--muted-foreground));
}

.upload-panel {
  margin-top: 1.5rem;
  border: 1px solid hsl(var(--border));
  border-radius: var(--radius);
  padding: 1.25rem;
  background-color: hsl(var(--background) / 0.5);
}

.progress-bg {
  width: 100%;
  height: 0.5rem;
  background-color: hsl(var(--secondary));
  border-radius: 9999px;
  overflow: hidden;
  margin: 1rem 0;
}

.progress-bar {
  height: 100%;
  background-color: hsl(var(--primary));
  transition: width 0.2s ease;
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  border-radius: 9999px;
  padding: 0.125rem 0.625rem;
  font-size: 0.75rem;
  font-weight: 600;
}

.badge-default {
  background-color: hsl(var(--secondary));
  color: hsl(var(--secondary-foreground));
}

.badge-success {
  background-color: hsl(142.1 76.2% 36.3% / 0.2);
  color: hsl(142.1 70.6% 45.3%);
}

.badge-destructive {
  background-color: hsl(var(--destructive) / 0.2);
  color: hsl(var(--destructive-foreground));
}

/* History List */
.history-section {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

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

.history-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.history-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem;
  border: 1px solid hsl(var(--border));
  border-radius: var(--radius);
  background-color: hsl(var(--card));
  gap: 1rem;
}

.history-info {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  min-width: 0;
  flex: 1;
}

.history-name {
  font-size: 0.875rem;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.history-actions {
  display: flex;
  gap: 0.5rem;
  flex-shrink: 0;
}

.error-text {
  color: #ef4444;
  font-size: 0.875rem;
  margin-top: 0.5rem;
  text-align: center;
}

.link {
  color: hsl(var(--primary));
  text-decoration: underline;
  text-underline-offset: 4px;
  cursor: pointer;
  background: none;
  border: none;
  font: inherit;
}