/* ─── Reset & Base ─────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --sidebar-w: 240px;
  --primary:   #2563eb;
  --primary-d: #1d4ed8;
  --danger:    #dc2626;
  --danger-d:  #b91c1c;
  --success:   #16a34a;
  --sidebar-bg:#0f172a;
  --sidebar-txt:#94a3b8;
  --sidebar-act:#e2e8f0;
  --body-bg:   #f1f5f9;
  --card-bg:   #ffffff;
  --border:    #e2e8f0;
  --text:      #1e293b;
  --text-muted:#64748b;
  --radius:    10px;
  --shadow:    0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.06);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,.1), 0 2px 4px -1px rgba(0,0,0,.06);
}

body {
  font-family: 'Pretendard', 'Noto Sans KR', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 14px;
  color: var(--text);
  background: var(--body-bg);
  line-height: 1.5;
}

/* ─── Login Page ───────────────────────────────────────────── */
.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #0f172a 0%, #1e3a5f 100%);
}

.login-card {
  background: var(--card-bg);
  border-radius: 16px;
  padding: 40px 36px;
  width: 100%;
  max-width: 400px;
  box-shadow: 0 20px 60px rgba(0,0,0,.3);
}

.login-logo {
  text-align: center;
  margin-bottom: 28px;
}

.login-logo .icon {
  width: 56px;
  height: 56px;
  background: var(--primary);
  border-radius: 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 12px;
}

.login-logo .icon svg { color: #fff; }

.login-logo h1 {
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
}

.login-logo p {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 4px;
}

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

/* ─── Sidebar ──────────────────────────────────────────────── */
.sidebar {
  width: var(--sidebar-w);
  background: var(--sidebar-bg);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  height: 100vh;
  z-index: 100;
}

.sidebar-header {
  padding: 24px 20px 20px;
  border-bottom: 1px solid rgba(255,255,255,.08);
}

.sidebar-header .brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.sidebar-header .brand-icon {
  width: 36px;
  height: 36px;
  background: var(--primary);
  border-radius: 9px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.sidebar-header .brand-name {
  font-size: 15px;
  font-weight: 700;
  color: #f8fafc;
  line-height: 1.2;
}

.sidebar-header .brand-sub {
  font-size: 11px;
  color: var(--sidebar-txt);
  display: block;
}

.sidebar-nav {
  flex: 1;
  padding: 16px 12px;
  overflow-y: auto;
}

.nav-label {
  font-size: 10px;
  font-weight: 600;
  color: #475569;
  text-transform: uppercase;
  letter-spacing: .08em;
  padding: 0 8px;
  margin: 16px 0 6px;
}

.nav-label:first-child { margin-top: 0; }

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 10px;
  border-radius: 8px;
  color: var(--sidebar-txt);
  text-decoration: none;
  font-size: 13.5px;
  font-weight: 500;
  transition: all .15s;
  margin-bottom: 2px;
}

.nav-item:hover {
  background: rgba(255,255,255,.07);
  color: var(--sidebar-act);
}

.nav-item.active {
  background: rgba(37,99,235,.25);
  color: #60a5fa;
}

.nav-item svg { flex-shrink: 0; opacity: .8; }
.nav-item.active svg { opacity: 1; }

.nav-item.danger { color: #f87171; }
.nav-item.danger:hover { background: rgba(220,38,38,.15); color: #fca5a5; }

.sidebar-footer {
  padding: 16px 12px;
  border-top: 1px solid rgba(255,255,255,.08);
}

.admin-info {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
}

.admin-avatar {
  width: 32px;
  height: 32px;
  background: var(--primary);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}

.admin-name { font-size: 13px; font-weight: 600; color: #e2e8f0; }
.admin-role { font-size: 11px; color: var(--sidebar-txt); }

/* ─── Main Content ─────────────────────────────────────────── */
.main {
  margin-left: var(--sidebar-w);
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.topbar {
  background: var(--card-bg);
  border-bottom: 1px solid var(--border);
  padding: 0 28px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 50;
}

.topbar-title { font-size: 16px; font-weight: 700; color: var(--text); }
.topbar-subtitle { font-size: 12px; color: var(--text-muted); margin-top: 1px; }

.page-content {
  padding: 28px;
  flex: 1;
}

/* ─── Cards ────────────────────────────────────────────────── */
.card {
  background: var(--card-bg);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.card-header {
  padding: 18px 22px 16px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.card-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 8px;
}

.card-title svg { color: var(--primary); }

.card-body { padding: 22px; }

/* ─── Stats ────────────────────────────────────────────────── */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.stat-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  padding: 20px 22px;
  display: flex;
  align-items: center;
  gap: 16px;
}

.stat-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.stat-icon.blue { background: #dbeafe; color: var(--primary); }
.stat-icon.green { background: #dcfce7; color: var(--success); }

.stat-num { font-size: 28px; font-weight: 700; color: var(--text); line-height: 1; }
.stat-label { font-size: 12px; color: var(--text-muted); margin-top: 4px; }

/* ─── Form ─────────────────────────────────────────────────── */
.form-row {
  display: flex;
  gap: 12px;
  align-items: flex-end;
  flex-wrap: wrap;
}

.form-group { display: flex; flex-direction: column; gap: 6px; flex: 1; min-width: 160px; }

.form-label {
  font-size: 12.5px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: .04em;
}

.form-input {
  height: 40px;
  padding: 0 12px;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  color: var(--text);
  background: #fff;
  transition: border-color .15s, box-shadow .15s;
  outline: none;
  width: 100%;
}

.form-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37,99,235,.12);
}

.form-input.error { border-color: var(--danger); }

/* ─── Buttons ──────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 40px;
  padding: 0 18px;
  border-radius: 8px;
  font-size: 13.5px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all .15s;
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
}
.btn-primary:hover { background: var(--primary-d); }

.btn-danger {
  background: transparent;
  color: var(--danger);
  border: 1.5px solid #fecaca;
  height: 34px;
  padding: 0 14px;
  font-size: 12.5px;
}
.btn-danger:hover { background: #fee2e2; border-color: var(--danger); }

.btn-secondary {
  background: #f1f5f9;
  color: var(--text);
  border: 1.5px solid var(--border);
}
.btn-secondary:hover { background: #e2e8f0; }

/* ─── Table ────────────────────────────────────────────────── */
.table-wrap { overflow-x: auto; }

table {
  width: 100%;
  border-collapse: collapse;
}

thead th {
  background: #f8fafc;
  padding: 10px 16px;
  text-align: left;
  font-size: 11.5px;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: .05em;
  border-bottom: 1px solid var(--border);
}

tbody tr {
  border-bottom: 1px solid #f1f5f9;
  transition: background .1s;
}
tbody tr:last-child { border-bottom: none; }
tbody tr:hover { background: #f8fafc; }

tbody td {
  padding: 13px 16px;
  font-size: 13.5px;
  color: var(--text);
  vertical-align: middle;
}

.user-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
}

.user-avatar-sm {
  width: 28px;
  height: 28px;
  border-radius: 7px;
  background: #dbeafe;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 700;
  flex-shrink: 0;
}

.empty-state {
  text-align: center;
  padding: 48px 20px;
  color: var(--text-muted);
}

.empty-state svg { margin-bottom: 12px; opacity: .3; }
.empty-state p { font-size: 14px; }

/* ─── Toast ────────────────────────────────────────────────── */
.toast-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toast {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 13px 18px;
  border-radius: 10px;
  font-size: 13.5px;
  font-weight: 500;
  box-shadow: var(--shadow-md);
  animation: slideIn .25s ease;
  min-width: 260px;
  max-width: 400px;
}

.toast.success { background: #f0fdf4; color: #15803d; border: 1px solid #bbf7d0; }
.toast.error   { background: #fef2f2; color: #b91c1c; border: 1px solid #fecaca; }

@keyframes slideIn {
  from { transform: translateX(20px); opacity: 0; }
  to   { transform: translateX(0);    opacity: 1; }
}

/* ─── Alert ────────────────────────────────────────────────── */
.alert {
  padding: 12px 16px;
  border-radius: 8px;
  font-size: 13.5px;
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
}

.alert-error   { background: #fef2f2; color: #b91c1c; border: 1px solid #fecaca; }
.alert-success { background: #f0fdf4; color: #15803d; border: 1px solid #bbf7d0; }

/* ─── Password strength ────────────────────────────────────── */
.password-strength { margin-top: 6px; height: 4px; border-radius: 2px; background: var(--border); overflow: hidden; }
.password-strength-bar { height: 100%; border-radius: 2px; transition: width .3s, background .3s; width: 0; }

/* ─── Password visibility toggle ───────────────────────────── */
.input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.input-wrapper .form-input {
  padding-right: 42px;
}

.toggle-password {
  position: absolute;
  right: 10px;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-muted);
  padding: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 4px;
  transition: color .15s;
  line-height: 0;
}

.toggle-password:hover { color: var(--text); }

/* ─── Collapsible Add Form ─────────────────────────────────── */
.add-form-wrapper {
  overflow: hidden;
  transition: max-height .3s ease;
  max-height: 0;
}

.add-form-wrapper.open { max-height: 200px; }

.add-form-inner {
  padding: 18px 22px;
  border-top: 1px solid var(--border);
  background: #f8fafc;
}

/* ─── Badge ────────────────────────────────────────────────── */
.badge {
  display: inline-block;
  padding: 2px 9px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 600;
}

.badge-blue { background: #dbeafe; color: #1d4ed8; }

/* ─── Utilities ────────────────────────────────────────────── */
.text-muted { color: var(--text-muted); }
.mt-4 { margin-top: 16px; }
.mt-6 { margin-top: 24px; }
.gap-2 { gap: 8px; }
.flex { display: flex; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }