:root {
  --primary: #1A6CFF;
  --on-primary: #FFFFFF;
  --primary-container: #DAE3FF;
  --on-primary-container: #001B3E;
  --secondary: #1D7A3E;
  --on-secondary: #FFFFFF;
  --secondary-container: #D7F5DD;
  --error: #BA1A1A;
  --error-container: #FFDAD6;
  --on-error-container: #410002;
  --background: #FDFBFF;
  --on-background: #1A1B20;
  --surface: #FDFBFF;
  --on-surface: #1A1B20;
  --surface-variant: #E0E2EC;
  --on-surface-variant: #44474E;
  --outline: #74777F;
  --outline-variant: #C4C6D0;
  --surface-high: #EBE7EC;
  --surface-highest: #E5E1E6;
  --shadow: rgba(0,0,0,0.15);

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-full: 20px;

  --elevation-1: 0 1px 3px 1px rgba(0,0,0,0.15), 0 1px 2px 0 rgba(0,0,0,0.30);
}

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

body {
  font-family: Roboto, system-ui, -apple-system, sans-serif;
  background: var(--background);
  color: var(--on-background);
  line-height: 1.5;
  min-height: 100vh;
  padding: 24px;
}

.container { max-width: 1400px; margin: 0 auto; display: flex; flex-direction: column; gap: 16px; }

.header { text-align: center; padding: 32px 16px 16px; }
.header h1 { font-size: 2rem; font-weight: 400; letter-spacing: -0.02em; margin-bottom: 8px; }
.header p { color: var(--on-surface-variant); font-size: 1rem; }

.lang-bar { display: flex; gap: 4px; justify-content: center; margin-top: 12px; }
.lang-btn {
  padding: 2px 12px; border: 1px solid var(--outline-variant); border-radius: var(--radius-full);
  background: transparent; color: var(--on-surface-variant); font-family: inherit; font-size: 0.75rem;
  font-weight: 500; cursor: pointer; transition: all 0.15s;
}
.lang-btn:hover { background: var(--surface-high); }
.lang-btn.active { background: var(--primary); color: var(--on-primary); border-color: var(--primary); }

.ms-icon {
  font-family: 'Material Symbols Outlined';
  font-weight: normal;
  font-style: normal;
  font-size: 20px;
  line-height: 1;
  vertical-align: middle;
  display: inline-block;
  font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 20;
}

.card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--elevation-1);
  overflow: hidden;
}
.card-header {
  padding: 20px 24px 8px;
  font-size: 1.125rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 8px;
}
.card-body { padding: 8px 24px 24px; }
.card-header-row { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 8px; }
.card-title { display: flex; align-items: center; gap: 8px; font-weight: 500; }
.card-actions { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }

.chip-group { display: flex; flex-wrap: wrap; gap: 6px; }
.chip {
  display: inline-flex;
  align-items: center;
  padding: 6px 16px;
  border: 1px solid var(--outline-variant);
  border-radius: var(--radius-full);
  cursor: pointer;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--on-surface-variant);
  transition: all 0.15s;
  user-select: none;
}
.chip:hover { background: var(--surface-high); }
.chip:has(input:checked) {
  border-color: var(--primary);
  background: var(--primary);
  color: var(--on-primary);
}
.chip-sm { padding: 4px 14px; font-size: 0.8125rem; }
.chip-sm:has(input:checked) { background: var(--primary); color: var(--on-primary); }

.preset-bar {
  margin-top: 12px;
  padding: 12px 16px;
  border: 1px dashed var(--primary);
  border-radius: var(--radius-md);
  background: var(--primary-container);
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
}
.preset-info {
  font-size: 0.8125rem;
  padding: 4px 12px;
  border-radius: var(--radius-sm);
  background: rgba(255,255,255,0.5);
  color: var(--on-primary-container);
  flex: 1;
  min-width: 160px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 20px;
  border: none;
  border-radius: var(--radius-full);
  font-family: inherit;
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s;
  line-height: 1.25;
  text-decoration: none;
  white-space: nowrap;
}
.btn:disabled { opacity: 0.38; pointer-events: none; }
.btn-sm { padding: 6px 16px; font-size: 0.8125rem; }
.btn-lg { padding: 12px 24px; font-size: 0.9375rem; }
.icon-btn { gap: 6px; }

.filled-btn { background: var(--primary); color: var(--on-primary); box-shadow: var(--elevation-1); }
.filled-btn:hover:not(:disabled) { box-shadow: 0 2px 6px 2px rgba(0,0,0,0.15); }
.filled-btn:active:not(:disabled) { box-shadow: var(--elevation-1); }

.tonal-btn { background: var(--secondary); color: var(--on-secondary); box-shadow: var(--elevation-1); }
.tonal-btn:hover:not(:disabled) { box-shadow: 0 2px 6px 2px rgba(0,0,0,0.15); }
.tonal-btn:active:not(:disabled) { box-shadow: var(--elevation-1); }

.outlined-btn {
  background: transparent;
  border: 1px solid var(--outline-variant);
  color: var(--primary);
}
.outlined-btn:hover:not(:disabled) { background: var(--primary-container); }
.outlined-btn[color=error] { color: var(--error); border-color: var(--error-container); }
.outlined-btn[color=error]:hover:not(:disabled) { background: var(--error-container); }

.btn-row { display: flex; gap: 8px; flex-wrap: wrap; }
.btn-row .btn { flex: 1; min-width: 140px; justify-content: center; }

.section { margin-bottom: 20px; }
.section-title {
  font-size: 0.9375rem;
  font-weight: 500;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--on-surface);
}

.input {
  padding: 8px 14px;
  border: 1px solid var(--outline-variant);
  border-radius: var(--radius-full);
  font-family: inherit;
  font-size: 0.8125rem;
  color: var(--on-surface);
  background: transparent;
  outline: none;
  transition: border-color 0.15s;
}
.input:focus { border-color: var(--primary); }
.input::placeholder { color: var(--on-surface-variant); opacity: 0.6; }

.custom-event-row { display: flex; gap: 6px; margin-top: 8px; align-items: center; }
.custom-event-row .input { flex: 1; max-width: 260px; }

.event-grid {
  max-height: 200px;
  overflow-y: auto;
  border: 1px solid var(--outline-variant);
  border-radius: var(--radius-md);
  padding: 10px 14px;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
  gap: 2px;
}
.event-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8125rem;
  padding: 2px 0;
}
.event-item input[type=checkbox] {
  accent-color: var(--primary);
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}
.event-item label { cursor: pointer; user-select: none; color: var(--on-surface); }

.event-chips { display: flex; flex-wrap: wrap; gap: 4px; margin-top: 6px; }

.chip-tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 10px;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 500;
  background: var(--primary-container);
  color: var(--on-primary-container);
}
.chip-tag .remove {
  cursor: pointer;
  font-size: 14px;
  line-height: 1;
  opacity: 0.7;
  background: none;
  border: none;
  color: inherit;
  padding: 0;
}
.chip-tag .remove:hover { opacity: 1; }

.drop-zone {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 48px;
  border: 2px dashed var(--outline-variant);
  border-radius: var(--radius-md);
  color: var(--on-surface-variant);
  font-size: 0.875rem;
  cursor: pointer;
  transition: all 0.2s;
  gap: 8px;
}
.drop-zone:hover { border-color: var(--primary); background: rgba(26,108,255,0.04); }
.drop-zone-icon { font-size: 40px !important; color: var(--on-surface-variant); }

.file-list { display: flex; flex-direction: column; gap: 6px; max-height: 420px; overflow-y: auto; }

.file-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  background: var(--surface-high);
  border-radius: var(--radius-md);
  transition: background 0.15s;
}
.file-item:hover { background: var(--surface-highest); }
.file-icon { color: var(--on-surface-variant); flex-shrink: 0; }
.file-info { flex: 1; min-width: 0; }
.file-name { font-weight: 500; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; font-size: 0.875rem; }
.file-size { font-size: 0.75rem; color: var(--on-surface-variant); }
.file-status { padding: 2px 10px; border-radius: var(--radius-full); font-size: 0.6875rem; font-weight: 500; letter-spacing: 0.025em; white-space: nowrap; flex-shrink: 0; }
.file-actions { display: flex; gap: 2px; flex-shrink: 0; }

[hidden] { display: none !important; }

.badge {
  display: inline-flex;
  padding: 3px 12px;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 500;
  background: var(--surface-highest);
  color: var(--on-surface-variant);
}

.progress-area { margin-bottom: 16px; }
.progress-header { display: flex; justify-content: space-between; margin-bottom: 6px; font-size: 0.8125rem; color: var(--on-surface-variant); }
.progress-bar { width: 100%; height: 4px; background: var(--surface-highest); border-radius: 2px; overflow: hidden; }
.progress-fill { height: 100%; background: var(--primary); border-radius: 2px; transition: width 0.3s; }

.alert {
  padding: 12px 16px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.875rem;
}
.alert-error { background: var(--error-container); color: var(--on-error-container); }

@media (max-width: 768px) {
  body { padding: 12px; }
  .card-body { padding: 8px 16px 20px; }
  .card-header { padding: 16px 16px 6px; }
  .card-header-row { flex-direction: column; align-items: flex-start; }
  .card-actions { width: 100%; }
  .card-actions .filled-btn { flex: 1; }
  .btn-row .btn { min-width: auto; }
  .file-item { flex-direction: column; align-items: stretch; gap: 8px; }
  .file-actions { justify-content: flex-end; }
  .event-grid { grid-template-columns: 1fr; }
  .header h1 { font-size: 1.5rem; }
  .preset-bar { flex-direction: column; align-items: stretch; }
  .drop-zone { padding: 32px; }
}