:root {
  --brand: #2563EB;
  --brand-dark: #1D4ED8;
  --brand-light: #EFF6FF;
  --surface: #F1F5F9;
  --card: #FFFFFF;
  --text: #0F172A;
  --muted: #64748B;
  --border: #E2E8F0;
  --success: #10B981;
  --success-bg: #ECFDF5;
  --danger: #EF4444;
  --danger-bg: #FEF2F2;
  --warning: #F59E0B;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.05);
  --shadow-md: 0 4px 12px rgba(0,0,0,.1);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  background: var(--surface);
  color: var(--text);
  font-size: 15px;
  line-height: 1.5;
  min-height: 100vh;
}

/* ── Layout ── */
.page { max-width: 680px; margin: 0 auto; padding: 24px 16px 64px; }
.page.wide { max-width: 1100px; }

/* ── Header ── */
.header {
  background: var(--card);
  border-bottom: 1px solid var(--border);
  padding: 0 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow);
}
.header .logo {
  font-weight: 700;
  font-size: 17px;
  color: var(--brand);
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
}
.header .logo svg { flex-shrink: 0; }
.header nav { display: flex; align-items: center; gap: 8px; }
.header .user-badge {
  background: var(--brand-light);
  color: var(--brand);
  font-weight: 600;
  font-size: 13px;
  padding: 4px 12px;
  border-radius: 20px;
}

/* ── Card ── */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
}
.card + .card { margin-top: 16px; }
.card-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all .15s;
  text-decoration: none;
  white-space: nowrap;
}
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn-primary { background: var(--brand); color: #fff; }
.btn-primary:hover:not(:disabled) { background: var(--brand-dark); }
.btn-secondary { background: var(--surface); color: var(--text); border: 1px solid var(--border); }
.btn-secondary:hover:not(:disabled) { background: var(--border); }
.btn-danger { background: var(--danger-bg); color: var(--danger); border: 1px solid #FECACA; }
.btn-danger:hover:not(:disabled) { background: #FEE2E2; }
.btn-success { background: var(--success); color: #fff; }
.btn-success:hover:not(:disabled) { background: #059669; }
.btn-sm { padding: 6px 12px; font-size: 13px; }
.btn-lg { padding: 14px 28px; font-size: 16px; border-radius: var(--radius); }
.btn-full { width: 100%; }
.btn-icon { padding: 8px; border-radius: var(--radius-sm); background: transparent; border: 1px solid var(--border); color: var(--muted); }
.btn-icon:hover { background: var(--surface); color: var(--text); }

/* ── Form ── */
.form-group { margin-bottom: 16px; }
.form-group:last-child { margin-bottom: 0; }
label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--muted);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: .04em;
}
input, select, textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 15px;
  color: var(--text);
  background: var(--card);
  transition: border-color .15s;
  font-family: inherit;
}
input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--brand);
  box-shadow: 0 0 0 3px rgba(37,99,235,.1);
}
textarea { resize: vertical; min-height: 80px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.form-row-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 12px; }

/* ── Duration badge ── */
.duration-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: var(--brand-light);
  color: var(--brand);
  font-weight: 700;
  font-size: 14px;
  padding: 6px 14px;
  border-radius: 20px;
  margin-top: 8px;
}

/* ── Table ── */
.table-wrap { overflow-x: auto; border-radius: var(--radius-sm); }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th {
  text-align: left;
  padding: 10px 14px;
  font-size: 12px;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: .05em;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}
td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}
tr:last-child td { border-bottom: none; }
tr:hover td { background: #F8FAFC; }
.worker-badge {
  display: inline-flex;
  align-items: center;
  font-weight: 600;
  font-size: 13px;
}
.worker-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  margin-right: 8px;
  flex-shrink: 0;
}

/* ── Stat cards ── */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 16px; margin-bottom: 24px; }
.stat-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
}
.stat-card .label { font-size: 12px; font-weight: 600; color: var(--muted); text-transform: uppercase; letter-spacing: .05em; margin-bottom: 4px; }
.stat-card .value { font-size: 28px; font-weight: 700; color: var(--text); line-height: 1.1; }
.stat-card .sub { font-size: 12px; color: var(--muted); margin-top: 2px; }

/* ── Alert ── */
.alert { padding: 12px 16px; border-radius: var(--radius-sm); font-size: 14px; margin-bottom: 16px; }
.alert-error { background: var(--danger-bg); color: var(--danger); border: 1px solid #FECACA; }
.alert-success { background: var(--success-bg); color: #065F46; border: 1px solid #A7F3D0; }
.alert-info { background: var(--brand-light); color: var(--brand-dark); border: 1px solid #BFDBFE; }

/* ── Empty state ── */
.empty {
  text-align: center;
  padding: 48px 16px;
  color: var(--muted);
}
.empty svg { margin: 0 auto 16px; opacity: .4; }
.empty p { font-size: 15px; }

/* ── Worker picker (index) ── */
.worker-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 12px; }
.worker-btn {
  background: var(--card);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 12px;
  text-align: center;
  cursor: pointer;
  transition: all .15s;
  font-family: inherit;
  width: 100%;
}
.worker-btn:hover { border-color: var(--brand); background: var(--brand-light); }
.worker-btn .avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 700;
  color: #fff;
  margin: 0 auto 10px;
}
.worker-btn .wname { font-weight: 600; font-size: 14px; color: var(--text); }

/* ── Filters ── */
.filters {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: flex-end;
  margin-bottom: 20px;
}
.filters .form-group { margin-bottom: 0; flex: 1; min-width: 140px; }
.filter-label { font-size: 12px; font-weight: 600; color: var(--muted); text-transform: uppercase; letter-spacing: .04em; display: block; margin-bottom: 6px; }

/* ── Login page ── */
.login-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.login-box { width: 100%; max-width: 400px; }
.login-logo { text-align: center; margin-bottom: 32px; }
.login-logo h1 { font-size: 24px; font-weight: 800; color: var(--brand); margin-top: 12px; }
.login-logo p { color: var(--muted); font-size: 14px; margin-top: 4px; }

/* ── Tag ── */
.tag { display: inline-block; padding: 2px 8px; border-radius: 4px; font-size: 12px; font-weight: 600; }
.tag-blue { background: var(--brand-light); color: var(--brand); }
.tag-green { background: var(--success-bg); color: #065F46; }
.tag-gray { background: var(--surface); color: var(--muted); }

/* ── Tabs ── */
.tabs { display: flex; gap: 4px; border-bottom: 2px solid var(--border); margin-bottom: 24px; }
.tab-btn {
  padding: 10px 16px;
  font-size: 14px;
  font-weight: 600;
  color: var(--muted);
  background: none;
  border: none;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: all .15s;
  font-family: inherit;
}
.tab-btn:hover { color: var(--text); }
.tab-btn.active { color: var(--brand); border-bottom-color: var(--brand); }
.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* ── Modal ── */
.modal-overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,.4);
  display: flex; align-items: center; justify-content: center;
  padding: 16px;
  z-index: 1000;
  animation: fadeIn .15s;
}
.modal-overlay.hidden { display: none; }
.modal {
  background: var(--card);
  border-radius: var(--radius);
  padding: 28px;
  width: 100%;
  max-width: 460px;
  box-shadow: var(--shadow-md);
  animation: slideUp .2s;
}
.modal h3 { font-size: 18px; font-weight: 700; margin-bottom: 20px; }
.modal-actions { display: flex; gap: 10px; justify-content: flex-end; margin-top: 20px; }

@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes slideUp { from { transform: translateY(12px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }

/* ── Misc ── */
.mt-4 { margin-top: 4px; }
.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.flex { display: flex; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.flex-center { display: flex; align-items: center; gap: 8px; }
.text-muted { color: var(--muted); }
.text-sm { font-size: 13px; }
.font-bold { font-weight: 700; }
.comment-text { color: var(--muted); font-size: 13px; font-style: italic; max-width: 260px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

@media (max-width: 600px) {
  .form-row, .form-row-3 { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .filters { flex-direction: column; }
  .filters .form-group { min-width: unset; width: 100%; }
  .hide-mobile { display: none !important; }
}