:root {
  --brand:      #d70a17;
  --brand-dark: #a60022;
  --gradient:   linear-gradient(to right, #ff3b04, #ce1125 50%, #a60022);
  --bg:         #f5f5f5;
  --card:       #ffffff;
  --border:     #e5e5e5;
  --text:       #222;
  --text-dim:   #666;
  --text-muted: #999;
  --input-bg:   #f2f2f2;
  --radius:     8px;
  --font:       'Noto Sans JP', 'Hiragino Sans', Helvetica, sans-serif;
}

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

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 14px;
  line-height: 1.6;
}

/* ── Login Screen ── */
.login-screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
}
.login-card {
  background: var(--card);
  border-radius: 16px;
  padding: 48px 40px;
  text-align: center;
  box-shadow: 0 4px 20px rgba(0,0,0,0.08);
  max-width: 400px;
  width: 90%;
}
.login-logo {
  font-size: 24px;
  font-weight: 800;
  color: var(--text);
  letter-spacing: 1px;
  margin-bottom: 4px;
}
.login-sub {
  font-size: 12px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 32px;
}
.login-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 28px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  cursor: pointer;
  transition: box-shadow 0.15s, border-color 0.15s;
}
.login-btn:hover {
  border-color: var(--brand);
  box-shadow: 0 2px 8px rgba(215,10,23,0.12);
}
.login-btn img { width: 20px; height: 20px; }
.login-error {
  color: var(--brand);
  font-size: 13px;
  margin-top: 16px;
}

/* ── App Shell ── */
.app { display: none; }
.app.visible { display: block; }

/* Top bar */
.topbar {
  background: var(--card);
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 100;
}
.topbar-brand {
  font-size: 16px;
  font-weight: 800;
  color: var(--text);
  letter-spacing: 0.5px;
}
.topbar-brand span {
  color: var(--brand);
  margin-left: 6px;
  font-weight: 600;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 1px;
}
.topbar-user {
  display: flex;
  align-items: center;
  gap: 12px;
}
.topbar-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 2px solid var(--border);
}
.topbar-name {
  font-size: 13px;
  color: var(--text-dim);
}
.topbar-logout {
  background: none;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px 14px;
  font-size: 12px;
  color: var(--text-dim);
  cursor: pointer;
  transition: border-color 0.15s;
}
.topbar-logout:hover {
  border-color: var(--brand);
  color: var(--brand);
}

/* Navigation */
.nav-bar {
  background: var(--card);
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
  display: flex;
  gap: 0;
  overflow-x: auto;
}
.nav-bar a {
  display: block;
  padding: 12px 20px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-dim);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  white-space: nowrap;
  transition: color 0.15s, border-color 0.15s;
}
.nav-bar a:hover {
  color: var(--text);
}
.nav-bar a.active {
  color: var(--brand);
  border-bottom-color: var(--brand);
}

/* Main content */
.main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px;
}

/* Page title */
.page-title {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 20px;
}

/* Cards */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  margin-bottom: 16px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.04);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 20px;
  border: none;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.15s;
}
.btn:disabled { opacity: 0.4; cursor: not-allowed; }
.btn-primary { background: var(--gradient); color: #fff; }
.btn-secondary { background: var(--input-bg); color: var(--text); }
.btn-outline { background: none; border: 1px solid var(--border); color: var(--text-dim); }

/* Search bar */
.search-bar {
  display: flex;
  gap: 12px;
  margin-bottom: 20px;
}
.search-bar input {
  flex: 1;
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 14px;
  background: var(--card);
}
.search-bar input:focus {
  outline: 2px solid var(--brand);
  outline-offset: -2px;
}
.search-bar select {
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 13px;
  background: var(--card);
  color: var(--text);
}

/* Stats grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}
.stat-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
}
.stat-label {
  font-size: 12px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
}
.stat-value {
  font-size: 28px;
  font-weight: 800;
  color: var(--text);
  margin-top: 4px;
}

/* Table */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}
.data-table th {
  text-align: left;
  padding: 10px 12px;
  font-size: 11px;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  border-bottom: 2px solid var(--border);
}
.data-table td {
  padding: 12px;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}
.data-table tr:hover td {
  background: #fafafa;
}
.data-table .member-photo {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--border);
}

/* Status badges */
.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 600;
}
.badge-active   { background: #dcfce7; color: #16a34a; }
.badge-inactive { background: #f3f4f6; color: #6b7280; }
.badge-trial    { background: #fef3c7; color: #d97706; }
.badge-dropin   { background: #dbeafe; color: #2563eb; }
.badge-quit     { background: #fef2f2; color: #dc2626; }

/* Empty state */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-muted);
}
.empty-state h3 { font-size: 16px; color: var(--text-dim); margin-bottom: 8px; }

/* Form fields */
.form-field {
  margin-bottom: 14px;
}
.form-field label {
  display: block;
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 4px;
}
.form-field input,
.form-field select,
.form-field textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 14px;
  background: var(--input-bg);
  font-family: var(--font);
}
.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  outline: 2px solid var(--brand);
  outline-offset: -2px;
}
.form-field input[type="file"] {
  padding: 8px;
  font-size: 13px;
}
.form-field input[type="checkbox"] {
  width: auto;
  margin-right: 6px;
}

/* Responsive */
@media (max-width: 768px) {
  .topbar { padding: 0 16px; }
  .nav-bar { padding: 0 16px; }
  .main { padding: 16px; }
  .search-bar { flex-direction: column; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
}