@import url('https://fonts.googleapis.com/css2?family=Google+Sans:wght@400;500;700&family=Roboto:wght@300;400;500&display=swap');

:root {
  --md-primary: #1a73e8;
  --md-primary-dark: #1557b0;
  --md-primary-light: #e8f0fe;
  --md-secondary: #5f6368;
  --md-surface: #ffffff;
  --md-background: #f8f9fa;
  --md-error: #d93025;
  --md-success: #188038;
  --md-warning: #f9ab00;
  --md-on-primary: #ffffff;
  --md-on-surface: #202124;
  --md-on-background: #3c4043;
  --md-border: #dadce0;
  --md-shadow-sm: 0 1px 2px rgba(60,64,67,.3), 0 1px 3px 1px rgba(60,64,67,.15);
  --md-shadow-md: 0 1px 3px rgba(60,64,67,.3), 0 4px 8px 3px rgba(60,64,67,.15);
  --md-radius: 8px;
  --md-radius-lg: 12px;
  --transition: 0.2s cubic-bezier(.4,0,.2,1);
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: 'Roboto', -apple-system, sans-serif;
  background: var(--md-background);
  color: var(--md-on-background);
  line-height: 1.5;
  min-height: 100vh;
}
.navbar {
  background: var(--md-surface);
  border-bottom: 1px solid var(--md-border);
  box-shadow: var(--md-shadow-sm);
  position: sticky; top: 0; z-index: 100;
}
.navbar-inner {
  max-width: 1200px; margin: 0 auto; padding: 0 24px;
  height: 64px; display: flex; align-items: center; justify-content: space-between;
}
.navbar-brand { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.navbar-logo {
  width: 32px; height: 32px; background: var(--md-primary); border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  color: white; font-weight: 700; font-size: 14px; letter-spacing: -0.5px;
}
.navbar-title { font-size: 18px; font-weight: 500; color: var(--md-on-surface); }
.navbar-title span { color: var(--md-primary); }
.navbar-actions { display: flex; align-items: center; gap: 8px; }
.navbar-user {
  font-size: 14px; color: var(--md-secondary);
  padding: 6px 12px; border-radius: 20px; background: var(--md-background);
}
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 20px; border-radius: 20px; font-size: 14px; font-weight: 500;
  cursor: pointer; border: none; transition: all 0.2s; text-decoration: none; white-space: nowrap;
}
.btn-primary { background: var(--md-primary); color: white; }
.btn-primary:hover { background: var(--md-primary-dark); box-shadow: var(--md-shadow-sm); }
.btn-outline { background: transparent; color: var(--md-primary); border: 1px solid var(--md-border); }
.btn-outline:hover { background: var(--md-primary-light); border-color: var(--md-primary); }
.btn-danger { background: transparent; color: var(--md-error); border: 1px solid var(--md-border); }
.btn-danger:hover { background: #fce8e6; border-color: var(--md-error); }
.btn-sm { padding: 5px 14px; font-size: 13px; border-radius: 16px; }
.page-container { max-width: 1200px; margin: 0 auto; padding: 32px 24px; }
.page-header { margin-bottom: 32px; }
.page-title { font-size: 24px; font-weight: 400; color: var(--md-on-surface); margin-bottom: 4px; }
.page-subtitle { font-size: 14px; color: var(--md-secondary); }
.card {
  background: var(--md-surface); border-radius: var(--md-radius-lg);
  box-shadow: var(--md-shadow-sm); border: 1px solid var(--md-border); overflow: hidden;
  margin-bottom: 24px;
}
.card-header {
  padding: 20px 24px 16px; border-bottom: 1px solid var(--md-border);
  display: flex; align-items: center; justify-content: space-between;
}
.card-title { font-size: 16px; font-weight: 500; color: var(--md-on-surface); }
.card-body { padding: 24px; }
.upload-zone {
  border: 2px dashed var(--md-border); border-radius: var(--md-radius-lg);
  padding: 48px 32px; text-align: center; cursor: pointer;
  transition: all 0.2s; background: var(--md-background);
}
.upload-zone:hover, .upload-zone.dragover {
  border-color: var(--md-primary); background: var(--md-primary-light);
}
.upload-icon {
  width: 56px; height: 56px; background: var(--md-primary-light); border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 16px; color: var(--md-primary); font-size: 24px;
}
.upload-title { font-size: 16px; font-weight: 500; color: var(--md-on-surface); margin-bottom: 6px; }
.upload-subtitle { font-size: 13px; color: var(--md-secondary); margin-bottom: 20px; }
.upload-types { display: flex; gap: 8px; justify-content: center; flex-wrap: wrap; }
.upload-chip {
  font-size: 11px; font-weight: 500; padding: 3px 10px; border-radius: 12px;
  background: var(--md-surface); color: var(--md-secondary); border: 1px solid var(--md-border);
}
.progress-wrapper { display: none; margin-top: 20px; }
.progress-bar-bg { height: 4px; background: var(--md-border); border-radius: 2px; overflow: hidden; }
.progress-bar-fill { height: 100%; background: var(--md-primary); border-radius: 2px; transition: width 0.3s; width: 0%; }
.progress-label { font-size: 13px; color: var(--md-secondary); margin-top: 8px; text-align: center; }
.table-wrapper { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
thead th {
  padding: 12px 16px; text-align: left; font-size: 12px; font-weight: 500;
  color: var(--md-secondary); text-transform: uppercase; letter-spacing: 0.5px;
  border-bottom: 1px solid var(--md-border); background: var(--md-background);
}
tbody tr { border-bottom: 1px solid var(--md-border); transition: background 0.15s; }
tbody tr:last-child { border-bottom: none; }
tbody tr:hover { background: var(--md-background); }
tbody td { padding: 12px 16px; color: var(--md-on-background); vertical-align: middle; }
.file-name { font-weight: 500; color: var(--md-on-surface); display: flex; align-items: center; gap: 8px; }
.file-icon {
  width: 32px; height: 32px; background: var(--md-primary-light); border-radius: 6px;
  display: flex; align-items: center; justify-content: center; color: var(--md-primary);
  font-size: 14px; flex-shrink: 0;
}
.empty-state { text-align: center; padding: 56px 32px; color: var(--md-secondary); }
.empty-icon { font-size: 48px; margin-bottom: 16px; opacity: 0.4; }
.empty-title { font-size: 16px; font-weight: 500; color: var(--md-secondary); margin-bottom: 6px; }
.toolbar {
  display: none; align-items: center; gap: 8px; padding: 12px 16px;
  background: var(--md-primary-light); border-radius: var(--md-radius); margin-bottom: 16px;
}
.toolbar.visible { display: flex; }
.toolbar-count { font-size: 14px; font-weight: 500; color: var(--md-primary); margin-right: auto; }
.alert {
  display: flex; align-items: flex-start; gap: 12px; padding: 14px 16px;
  border-radius: var(--md-radius); font-size: 14px; margin-bottom: 16px; border: 1px solid transparent;
}
.alert-success { background: #e6f4ea; color: var(--md-success); border-color: #ceead6; }
.alert-error, .alert-danger { background: #fce8e6; color: var(--md-error); border-color: #f5c6c2; }
.alert-warning { background: #fef7e0; color: #b06000; border-color: #fce8b2; }
.alert-info { background: var(--md-primary-light); color: var(--md-primary-dark); border-color: #c5d9f8; }
.alert-close { margin-left: auto; background: none; border: none; cursor: pointer; opacity: 0.6; font-size: 18px; color: inherit; padding: 0; }
.login-page {
  min-height: 100vh; display: flex; align-items: center; justify-content: center;
  background: var(--md-background); padding: 24px;
}
.login-card {
  background: var(--md-surface); border-radius: var(--md-radius-lg);
  box-shadow: var(--md-shadow-md); padding: 48px 40px;
  width: 100%; max-width: 400px; border: 1px solid var(--md-border);
}
.login-logo { display: flex; flex-direction: column; align-items: center; margin-bottom: 32px; }
.login-logo-mark {
  width: 56px; height: 56px; background: var(--md-primary); border-radius: 14px;
  display: flex; align-items: center; justify-content: center; color: white;
  font-size: 22px; font-weight: 700; margin-bottom: 16px;
  box-shadow: 0 4px 12px rgba(26,115,232,.35);
}
.login-logo h1 { font-size: 20px; font-weight: 500; color: var(--md-on-surface); margin-bottom: 2px; }
.login-logo p { font-size: 13px; color: var(--md-secondary); }
.form-group { margin-bottom: 20px; }
.form-label { display: block; font-size: 13px; font-weight: 500; color: var(--md-secondary); margin-bottom: 6px; }
.form-control {
  width: 100%; padding: 10px 14px; border: 1px solid var(--md-border);
  border-radius: var(--md-radius); font-size: 14px; color: var(--md-on-surface);
  background: var(--md-surface); transition: border-color 0.2s, box-shadow 0.2s; outline: none;
}
.form-control:focus { border-color: var(--md-primary); box-shadow: 0 0 0 3px rgba(26,115,232,.12); }
.form-control::placeholder { color: #bdc1c6; }
.badge { display: inline-block; padding: 3px 10px; border-radius: 12px; font-size: 12px; font-weight: 500; }
.badge-success { background: #e6f4ea; color: var(--md-success); }
.badge-error { background: #fce8e6; color: var(--md-error); }
.badge-secondary { background: #f1f3f4; color: var(--md-secondary); }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
input[type="checkbox"] { width: 16px; height: 16px; accent-color: var(--md-primary); cursor: pointer; }
.page-footer { text-align: center; padding: 24px; font-size: 12px; color: #9aa0a6; border-top: 1px solid var(--md-border); margin-top: 48px; }
.stat-row { display: flex; gap: 16px; margin-bottom: 24px; flex-wrap: wrap; }
.stat-chip { background: var(--md-surface); border: 1px solid var(--md-border); border-radius: var(--md-radius); padding: 16px 20px; flex: 1; min-width: 120px; box-shadow: var(--md-shadow-sm); }
.stat-value { font-size: 28px; font-weight: 400; color: var(--md-primary); line-height: 1; margin-bottom: 4px; }
.stat-label { font-size: 13px; color: var(--md-secondary); }
@media (max-width: 768px) {
  .grid-2 { grid-template-columns: 1fr; }
  .navbar-inner { padding: 0 16px; }
  .page-container { padding: 20px 16px; }
  .login-card { padding: 32px 24px; }
}