:root {
    --bg: #f5f6f8;
    --surface: #ffffff;
    --border: #e3e6eb;
    --text: #1f2328;
    --muted: #6a737d;
    --primary: #2f6feb;
    --primary-dark: #1f53b8;
    --error-bg: #fde8e8;
    --error-text: #9b1c1c;
    --radius: 8px;
}

* { box-sizing: border-box; }

html, body { margin: 0; padding: 0; }

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Topbar */
.topbar {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
}
.topbar-inner {
    max-width: 1120px;
    margin: 0 auto;
    padding: 12px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.brand { font-weight: 600; color: var(--text); }
.topbar-nav { display: flex; align-items: center; gap: 16px; }
.user { color: var(--muted); font-size: 14px; }
.inline { display: inline; margin: 0; }
.link-button {
    background: none; border: none; padding: 0; color: var(--primary);
    cursor: pointer; font: inherit;
}
.link-button:hover { text-decoration: underline; }

/* Main */
.main { padding: 32px 24px; }
.container { max-width: 1120px; margin: 0 auto; }

/* Auth */
body.auth { display: flex; align-items: center; justify-content: center; min-height: 100vh; }
body.auth .main { width: 100%; padding: 24px; }
.login-card { max-width: 400px; margin: 0 auto; }

/* Card */
.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.04);
}
.card h1 { margin-top: 0; font-size: 22px; }

/* Form */
label {
    display: block;
    margin: 16px 0 6px;
    font-size: 13px;
    font-weight: 600;
    color: var(--text);
}
input[type="text"], input[type="email"], input[type="password"], textarea, select {
    width: 100%;
    padding: 9px 12px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font: inherit;
    background: #fff;
}
input:focus, textarea:focus, select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(47, 111, 235, 0.15);
}
.btn {
    display: inline-block;
    padding: 9px 18px;
    border-radius: 6px;
    border: 1px solid transparent;
    font: inherit;
    cursor: pointer;
    margin-top: 20px;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }

/* Alert */
.alert {
    padding: 10px 14px;
    border-radius: 6px;
    font-size: 14px;
    margin: 16px 0;
}
.alert-error { background: var(--error-bg); color: var(--error-text); }

/* Misc */
.muted { color: var(--muted); }
h1, h2 { color: var(--text); }
h2 { font-size: 18px; margin-top: 32px; }

/* Stats */
.stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 16px;
    margin: 20px 0;
}
.stat {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
}
.stat-value { font-size: 28px; font-weight: 600; }
.stat-label { color: var(--muted); font-size: 13px; text-transform: uppercase; letter-spacing: 0.04em; }

/* Table */
.data-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
}
.data-table th, .data-table td {
    padding: 10px 14px;
    text-align: left;
    border-bottom: 1px solid var(--border);
    font-size: 14px;
}
.data-table th { background: #fafbfc; font-weight: 600; }
.data-table tbody tr:last-child td { border-bottom: none; }
code { background: #eef0f3; padding: 1px 6px; border-radius: 4px; font-size: 13px; }

/* Installer */
.install-step { margin: 16px 0; }
.install-check { display: flex; gap: 8px; align-items: center; padding: 4px 0; }
.install-check.ok::before { content: "✓"; color: #1a7f37; font-weight: 700; }
.install-check.bad::before { content: "✗"; color: var(--error-text); font-weight: 700; }

/* Topbar nav links */
.topbar-nav a { color: var(--muted); font-size: 14px; }
.topbar-nav a:hover { color: var(--text); text-decoration: none; }

/* Page header (title + action button row) */
.page-header { display: flex; align-items: center; justify-content: space-between; margin: 0 0 16px; }
.page-header h1, .page-header h2 { margin: 0; }

/* Tenant header + sub-nav */
.tenant-header { margin-bottom: 8px; }
.tenant-title { margin: 0; }
.sub-nav {
    display: flex; gap: 4px;
    border-bottom: 1px solid var(--border);
    margin: 0 0 24px;
}
.sub-nav a {
    padding: 8px 14px;
    color: var(--muted);
    border-bottom: 2px solid transparent;
    margin-bottom: -1px;
    font-size: 14px;
}
.sub-nav a:hover { color: var(--text); text-decoration: none; }
.sub-nav a.active { color: var(--primary); border-bottom-color: var(--primary); font-weight: 600; }

/* Two-column grid */
.grid-two { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
@media (max-width: 800px) { .grid-two { grid-template-columns: 1fr; } }

/* Key/value list */
dl.kv { display: grid; grid-template-columns: 140px 1fr; gap: 6px 16px; margin: 0; font-size: 14px; }
dl.kv dt { color: var(--muted); }
dl.kv dd { margin: 0; }

/* Action cell in tables */
.data-table td.actions { text-align: right; white-space: nowrap; }
.data-table td.actions a, .data-table td.actions form { margin-left: 12px; }

/* Badges */
.badge {
    display: inline-block; padding: 2px 8px; border-radius: 10px;
    font-size: 12px; background: #eef0f3; color: var(--muted);
}
.badge-ext { background: #fef3c7; color: #92400e; }
.badge-int { background: #dbeafe; color: #1e40af; }

/* Buttons */
.btn { background: var(--surface); color: var(--text); border-color: var(--border); }
.btn:hover { background: #f6f7f9; text-decoration: none; }
.btn[disabled] { opacity: 0.5; cursor: not-allowed; }
.btn-danger { background: #dc2626; color: #fff; border-color: #dc2626; }
.btn-danger:hover { background: #b91c1c; }

/* Alerts */
.alert-success { background: #e6f4ea; color: #1a7f37; }

/* Textarea */
textarea {
    width: 100%; padding: 9px 12px; border: 1px solid var(--border);
    border-radius: 6px; font: inherit; background: #fff; resize: vertical;
}
textarea:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(47,111,235,0.15); }

/* Select */
select {
    width: 100%; padding: 9px 12px; border: 1px solid var(--border);
    border-radius: 6px; font: inherit; background: #fff;
}

/* Inline checkboxes (settings toggles) */
label.check-inline {
    display: flex; align-items: center; gap: 8px;
    margin: 12px 0 4px; font-weight: 500;
}
label.check-inline input { width: auto; margin: 0; }

/* Secondary buttons (SSO links on the login page) */
.btn-secondary { background: #fff; color: var(--text); border-color: var(--border); }
.btn-secondary:hover { background: #f6f7f9; }
.btn-block { display: block; width: 100%; text-align: center; }

/* Login divider between local and SSO */
.login-sep {
    display: flex; align-items: center; gap: 12px;
    color: var(--muted); font-size: 12px; text-transform: uppercase;
    letter-spacing: 0.08em;
    margin: 24px 0 12px;
}
.login-sep::before, .login-sep::after {
    content: ""; flex: 1; height: 1px; background: var(--border);
}

/* Copyable single-line value (redirect URI on tenant page) */
.copybox {
    display: block; padding: 8px 12px; background: #f6f7f9;
    border: 1px solid var(--border); border-radius: 6px;
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 13px; word-break: break-all;
}