/* ================================================================
   シフト管理システム — デザインシステム
   Pure CSS（フレームワーク不使用）
================================================================ */

/* ── CSS Variables ─────────────────────────────────────────── */
:root {
  --clr-primary:      #2563eb;
  --clr-primary-dk:   #1d4ed8;
  --clr-primary-lt:   #dbeafe;
  --clr-success:      #16a34a;
  --clr-success-lt:   #dcfce7;
  --clr-warning:      #d97706;
  --clr-warning-lt:   #fef3c7;
  --clr-danger:       #dc2626;
  --clr-danger-lt:    #fee2e2;
  --clr-gray-50:      #f8fafc;
  --clr-gray-100:     #f1f5f9;
  --clr-gray-200:     #e2e8f0;
  --clr-gray-300:     #cbd5e1;
  --clr-gray-400:     #94a3b8;
  --clr-gray-500:     #64748b;
  --clr-gray-700:     #334155;
  --clr-gray-900:     #0f172a;
  --clr-white:        #ffffff;
  --sidebar-w:        240px;
  --header-h:         56px;
  --radius:           8px;
  --radius-sm:        4px;
  --shadow:           0 1px 3px rgba(0,0,0,.1), 0 1px 2px rgba(0,0,0,.06);
  --shadow-md:        0 4px 6px rgba(0,0,0,.07), 0 2px 4px rgba(0,0,0,.05);
  --transition:       0.15s ease;
}

/* ── Reset ─────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 14px; }
body { font-family: 'Hiragino Sans', 'Noto Sans JP', 'Meiryo', sans-serif;
       background: var(--clr-gray-100); color: var(--clr-gray-700); line-height: 1.6; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; font-family: inherit; }
input, select, textarea { font-family: inherit; font-size: inherit; }
ul { list-style: none; }

/* ── Layout ─────────────────────────────────────────────────── */
.app-shell { display: flex; min-height: 100vh; }

/* Sidebar */
.sidebar {
  width: var(--sidebar-w); flex-shrink: 0;
  background: var(--clr-gray-900); color: var(--clr-gray-400);
  display: flex; flex-direction: column;
  position: fixed; top: 0; left: 0; height: 100vh;
  overflow-y: auto; z-index: 100;
}
.sidebar-logo {
  padding: 20px 16px 16px; border-bottom: 1px solid rgba(255,255,255,.08);
  display: flex; align-items: center; gap: 10px;
}
.sidebar-logo .logo-icon {
  width: 32px; height: 32px; border-radius: 8px;
  background: var(--clr-primary); display: flex; align-items: center;
  justify-content: center; color: white; font-size: 16px; font-weight: 700;
}
.sidebar-logo .logo-text { font-size: 13px; font-weight: 600; color: white; line-height: 1.3; }
.sidebar-logo .logo-sub  { font-size: 10px; color: var(--clr-gray-400); }
.sidebar-section { padding: 12px 8px 4px; font-size: 10px;
  font-weight: 700; letter-spacing: .08em; text-transform: uppercase;
  color: var(--clr-gray-500); padding-left: 16px; }
.sidebar-nav { padding: 4px 8px; }
.sidebar-link {
  display: flex; align-items: center; gap: 10px;
  padding: 9px 12px; border-radius: var(--radius-sm);
  font-size: 13px; font-weight: 500; color: var(--clr-gray-400);
  transition: background var(--transition), color var(--transition);
  white-space: nowrap; overflow: hidden;
}
.sidebar-link:hover { background: rgba(255,255,255,.06); color: white; }
.sidebar-link.active { background: var(--clr-primary); color: white; }
.sidebar-link .icon { font-size: 16px; width: 20px; text-align: center; flex-shrink: 0; }
.sidebar-footer {
  margin-top: auto; padding: 12px 8px;
  border-top: 1px solid rgba(255,255,255,.08);
}
.sidebar-user {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 12px; border-radius: var(--radius-sm);
}
.user-avatar {
  width: 30px; height: 30px; border-radius: 50%;
  background: var(--clr-primary); color: white;
  display: flex; align-items: center; justify-content: center;
  font-size: 12px; font-weight: 700; flex-shrink: 0;
}
.user-info { overflow: hidden; }
.user-name  { font-size: 12px; font-weight: 600; color: white;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.user-role  { font-size: 10px; color: var(--clr-gray-400); }

/* Main */
.main-area { margin-left: var(--sidebar-w); flex: 1; display: flex; flex-direction: column; min-height: 100vh; }
.main-header {
  height: var(--header-h); background: var(--clr-white);
  border-bottom: 1px solid var(--clr-gray-200);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 24px; position: sticky; top: 0; z-index: 50;
  box-shadow: var(--shadow);
}
.page-title { font-size: 16px; font-weight: 700; color: var(--clr-gray-900); }
.header-actions { display: flex; align-items: center; gap: 12px; }
.page-body { padding: 24px; flex: 1; }

/* ── Cards ──────────────────────────────────────────────────── */
.card {
  background: var(--clr-white); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 20px;
}
.card-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 16px; gap: 12px; flex-wrap: wrap;
}
.card-title { font-size: 15px; font-weight: 700; color: var(--clr-gray-900); }
.card-body   { }
.card + .card { margin-top: 16px; }

/* ── Grid Layouts ────────────────────────────────────────────── */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
@media (max-width: 1024px) { .grid-4 { grid-template-columns: repeat(2,1fr); } }
@media (max-width: 768px)  { .grid-2,.grid-3,.grid-4 { grid-template-columns: 1fr; } }

/* ── Stat Cards ─────────────────────────────────────────────── */
.stat-card { padding: 16px 20px; }
.stat-label { font-size: 12px; color: var(--clr-gray-500); font-weight: 500; margin-bottom: 4px; }
.stat-value { font-size: 28px; font-weight: 700; color: var(--clr-gray-900); }
.stat-value.danger  { color: var(--clr-danger); }
.stat-value.warning { color: var(--clr-warning); }
.stat-value.success { color: var(--clr-success); }
.stat-sub   { font-size: 11px; color: var(--clr-gray-400); margin-top: 2px; }

/* ── Buttons ─────────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 6px; padding: 7px 16px; border-radius: var(--radius-sm);
  font-size: 13px; font-weight: 600; border: none;
  transition: background var(--transition), opacity var(--transition);
  white-space: nowrap; line-height: 1.4;
}
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn-primary  { background: var(--clr-primary); color: white; }
.btn-primary:hover:not(:disabled) { background: var(--clr-primary-dk); }
.btn-success  { background: var(--clr-success); color: white; }
.btn-success:hover:not(:disabled) { background: #15803d; }
.btn-danger   { background: var(--clr-danger); color: white; }
.btn-danger:hover:not(:disabled)  { background: #b91c1c; }
.btn-warning  { background: var(--clr-warning); color: white; }
.btn-warning:hover:not(:disabled) { background: #b45309; }
.btn-ghost  { background: transparent; color: var(--clr-gray-500);
  border: 1px solid var(--clr-gray-200); }
.btn-ghost:hover:not(:disabled)   { background: var(--clr-gray-100); }
.btn-sm { padding: 4px 10px; font-size: 12px; }
.btn-lg { padding: 10px 24px; font-size: 15px; }
.btn-icon { padding: 7px; }

/* ── Forms ───────────────────────────────────────────────────── */
.form-group { margin-bottom: 16px; }
.form-label { display: block; font-size: 12px; font-weight: 600;
  color: var(--clr-gray-700); margin-bottom: 5px; }
.form-label .required { color: var(--clr-danger); margin-left: 2px; }
.form-control {
  width: 100%; padding: 8px 12px; font-size: 13px;
  border: 1px solid var(--clr-gray-300); border-radius: var(--radius-sm);
  background: white; color: var(--clr-gray-700);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.form-control:focus { outline: none; border-color: var(--clr-primary);
  box-shadow: 0 0 0 3px rgba(37,99,235,.12); }
.form-control.error { border-color: var(--clr-danger); }
.form-error { font-size: 11px; color: var(--clr-danger); margin-top: 4px; }
.form-hint  { font-size: 11px; color: var(--clr-gray-400); margin-top: 4px; }
.form-row   { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
select.form-control { appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 10px center; padding-right: 30px; }

/* ── Tables ──────────────────────────────────────────────────── */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 13px; }
thead { background: var(--clr-gray-50); }
th { padding: 10px 12px; text-align: left; font-weight: 600; font-size: 12px;
  color: var(--clr-gray-500); border-bottom: 1px solid var(--clr-gray-200);
  white-space: nowrap; }
td { padding: 10px 12px; border-bottom: 1px solid var(--clr-gray-100);
  vertical-align: middle; }
tbody tr:hover { background: var(--clr-gray-50); }
.table-actions { display: flex; gap: 6px; flex-wrap: wrap; }

/* ── Badges ──────────────────────────────────────────────────── */
.badge {
  display: inline-flex; align-items: center; padding: 2px 8px;
  border-radius: 999px; font-size: 11px; font-weight: 600; white-space: nowrap;
}
.badge-blue    { background: var(--clr-primary-lt); color: var(--clr-primary); }
.badge-green   { background: var(--clr-success-lt); color: var(--clr-success); }
.badge-yellow  { background: var(--clr-warning-lt); color: var(--clr-warning); }
.badge-red     { background: var(--clr-danger-lt);  color: var(--clr-danger); }
.badge-gray    { background: var(--clr-gray-100);   color: var(--clr-gray-500); }
.badge-purple  { background: #ede9fe; color: #7c3aed; }

/* ── Alerts ──────────────────────────────────────────────────── */
.alert {
  display: flex; align-items: flex-start; gap: 10px;
  padding: 12px 16px; border-radius: var(--radius-sm);
  font-size: 13px; margin-bottom: 12px;
}
.alert-icon { font-size: 16px; flex-shrink: 0; margin-top: 1px; }
.alert-error   { background: var(--clr-danger-lt);  color: #991b1b;  border-left: 4px solid var(--clr-danger); }
.alert-warning { background: var(--clr-warning-lt); color: #92400e;  border-left: 4px solid var(--clr-warning); }
.alert-success { background: var(--clr-success-lt); color: #166534;  border-left: 4px solid var(--clr-success); }
.alert-info    { background: var(--clr-primary-lt); color: #1e40af;  border-left: 4px solid var(--clr-primary); }

/* ── Modal ───────────────────────────────────────────────────── */
.modal-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,.45);
  display: flex; align-items: center; justify-content: center;
  z-index: 200; padding: 16px;
}
.modal {
  background: white; border-radius: var(--radius); box-shadow: var(--shadow-md);
  width: 100%; max-width: 520px; max-height: 90vh;
  display: flex; flex-direction: column;
}
.modal-lg { max-width: 720px; }
.modal-header {
  padding: 16px 20px; border-bottom: 1px solid var(--clr-gray-200);
  display: flex; align-items: center; justify-content: space-between; flex-shrink: 0;
}
.modal-title  { font-size: 15px; font-weight: 700; }
.modal-body   { padding: 20px; overflow-y: auto; flex: 1; }
.modal-footer {
  padding: 12px 20px; border-top: 1px solid var(--clr-gray-200);
  display: flex; justify-content: flex-end; gap: 8px; flex-shrink: 0;
}
.btn-close { background: none; border: none; font-size: 18px;
  color: var(--clr-gray-400); line-height: 1; padding: 2px; }
.btn-close:hover { color: var(--clr-gray-700); }

/* ── Login Page ──────────────────────────────────────────────── */
.login-page {
  min-height: 100vh; background: var(--clr-gray-900);
  display: flex; align-items: center; justify-content: center; padding: 24px;
}
.login-box {
  background: white; border-radius: var(--radius);
  box-shadow: var(--shadow-md); padding: 40px; width: 100%; max-width: 380px;
}
.login-logo { text-align: center; margin-bottom: 28px; }
.login-logo h1 { font-size: 20px; font-weight: 800; color: var(--clr-gray-900); margin-top: 10px; }
.login-logo p  { font-size: 12px; color: var(--clr-gray-400); margin-top: 2px; }
.login-icon {
  width: 48px; height: 48px; border-radius: 12px;
  background: var(--clr-primary); color: white;
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 22px; font-weight: 700;
}

/* ── Calendar ────────────────────────────────────────────────── */
.cal-nav {
  display: flex; align-items: center; gap: 12px; margin-bottom: 16px;
}
.cal-title { font-size: 18px; font-weight: 700; }
.cal-grid {
  display: grid; grid-template-columns: repeat(7, 1fr);
  gap: 2px; background: var(--clr-gray-200); border: 1px solid var(--clr-gray-200);
  border-radius: var(--radius); overflow: hidden;
}
.cal-dow {
  background: var(--clr-gray-50); text-align: center;
  font-size: 11px; font-weight: 700; color: var(--clr-gray-500);
  padding: 8px 4px;
}
.cal-dow.sun { color: var(--clr-danger); }
.cal-dow.sat { color: var(--clr-primary); }
.cal-day {
  background: white; min-height: 100px; padding: 6px;
  cursor: pointer; transition: background var(--transition);
}
.cal-day:hover { background: var(--clr-gray-50); }
.cal-day.empty { background: var(--clr-gray-50); cursor: default; }
.cal-day.today { background: #eff6ff; }
.cal-day.violation { background: #fff1f2; }
.cal-date-num {
  font-size: 12px; font-weight: 700; margin-bottom: 4px;
  display: inline-flex; align-items: center; justify-content: center;
  width: 22px; height: 22px; border-radius: 50%;
}
.cal-day.today .cal-date-num { background: var(--clr-primary); color: white; }
.cal-shift-item {
  font-size: 10px; padding: 2px 5px; border-radius: 3px; margin-bottom: 2px;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  background: var(--clr-primary-lt); color: var(--clr-primary);
}
.cal-shift-item.cdm     { background: #ede9fe; color: #7c3aed; }
.cal-shift-item.manager { background: var(--clr-danger-lt); color: var(--clr-danger); }
.cal-shift-item.nursery { background: var(--clr-success-lt); color: var(--clr-success); }
.cal-shift-item.other   { background: var(--clr-gray-100); color: var(--clr-gray-500); }
.cal-count { font-size: 10px; color: var(--clr-gray-400); margin-top: 2px; }
.cal-violation-badge {
  display: inline-flex; font-size: 9px; background: var(--clr-danger);
  color: white; border-radius: 3px; padding: 1px 4px; margin-left: 4px;
}

/* ── Request Calendar ────────────────────────────────────────── */
.req-cal-grid {
  display: grid; grid-template-columns: repeat(7, 1fr); gap: 6px;
}
.req-cal-day {
  border: 1px solid var(--clr-gray-200); border-radius: var(--radius-sm);
  padding: 8px; background: white;
}
.req-cal-day.off-day { background: var(--clr-gray-50); }
.req-cal-day .day-num { font-size: 12px; font-weight: 700; margin-bottom: 6px; }

/* ── Tabs ────────────────────────────────────────────────────── */
.tabs { display: flex; gap: 0; border-bottom: 2px solid var(--clr-gray-200); margin-bottom: 20px; }
.tab-btn {
  padding: 10px 18px; font-size: 13px; font-weight: 600;
  background: none; border: none; color: var(--clr-gray-400);
  cursor: pointer; border-bottom: 2px solid transparent; margin-bottom: -2px;
  transition: color var(--transition), border-color var(--transition);
}
.tab-btn:hover  { color: var(--clr-gray-700); }
.tab-btn.active { color: var(--clr-primary); border-bottom-color: var(--clr-primary); }

/* ── Filter Bar ──────────────────────────────────────────────── */
.filter-bar { display: flex; gap: 10px; flex-wrap: wrap; align-items: flex-end; margin-bottom: 16px; }
.filter-bar .form-group { margin-bottom: 0; }
.filter-bar .form-control { min-width: 140px; }

/* ── Misc ────────────────────────────────────────────────────── */
.page-empty { text-align: center; padding: 48px 24px; color: var(--clr-gray-400); }
.page-empty .empty-icon { font-size: 40px; margin-bottom: 12px; }
.page-empty p { font-size: 14px; }
.text-muted   { color: var(--clr-gray-400); font-size: 12px; }
.text-right   { text-align: right; }
.mt-4 { margin-top: 4px; }  .mt-8 { margin-top: 8px; }
.mt-16{ margin-top: 16px; } .mt-24{ margin-top: 24px; }
.mb-8 { margin-bottom: 8px; }.mb-16{ margin-bottom: 16px; }
.flex { display: flex; } .items-center { align-items: center; }
.gap-8 { gap: 8px; } .gap-12 { gap: 12px; }
.loading { display: flex; align-items: center; justify-content: center; padding: 48px; }
.spinner {
  width: 32px; height: 32px; border: 3px solid var(--clr-gray-200);
  border-top-color: var(--clr-primary); border-radius: 50%;
  animation: spin .7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ── Toast / Notification ────────────────────────────────────── */
.toast-wrap {
  position: fixed; bottom: 24px; right: 24px; z-index: 1000;
  display: flex; flex-direction: column; gap: 8px; max-width: 360px;
}
.toast {
  display: flex; align-items: flex-start; gap: 10px;
  padding: 12px 16px; border-radius: var(--radius); box-shadow: var(--shadow-md);
  font-size: 13px; font-weight: 500; animation: slideIn .25s ease;
}
.toast-success { background: white; border-left: 4px solid var(--clr-success); }
.toast-error   { background: white; border-left: 4px solid var(--clr-danger); }
@keyframes slideIn { from { transform: translateX(100%); opacity: 0; } to { transform: translateX(0); opacity: 1; } }

/* ── Checkbox / Toggle ───────────────────────────────────────── */
.check-label {
  display: flex; align-items: center; gap: 8px;
  cursor: pointer; font-size: 13px;
}
.check-label input[type=checkbox] { width: 15px; height: 15px; cursor: pointer; }