:root {
    --navy: #0f1b3d;
    --blue: #2563eb;
    --blue-dark: #1d4ed8;
    --ink: #101828;
    --gray-700: #344054;
    --gray-500: #667085;
    --gray-300: #d0d5dd;
    --gray-100: #f2f4f7;
    --gray-50: #f9fafb;
    --green: #12b76a;
    --red: #d92d20;
    --radius: 10px;
    --shadow-sm: 0 1px 2px rgba(16,24,40,.06);
    --shadow-md: 0 4px 12px rgba(16,24,40,.08);
}
* { box-sizing: border-box; }
body {
    margin: 0; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    color: var(--ink); background: var(--gray-50);
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; }

/* Login page */
.login-wrap { min-height: 100vh; display: flex; align-items: center; justify-content: center; background: radial-gradient(1200px 600px at 80% -10%, #1a2a6e 0%, var(--navy) 60%, #0a1230 100%); }
.login-card { background: #fff; border-radius: 16px; padding: 40px; width: 380px; box-shadow: var(--shadow-md); }
.login-card .brand-badge { width: 44px; height: 44px; border-radius: 10px; background: linear-gradient(135deg,#2563eb,#7c3aed); color: #fff; display: flex; align-items: center; justify-content: center; font-weight: 800; margin-bottom: 18px; }
.login-card h1 { font-size: 20px; margin: 0 0 4px; }
.login-card p.sub { color: var(--gray-500); font-size: 13.5px; margin: 0 0 24px; }

/* Layout */
.admin-shell { display: flex; min-height: 100vh; }
.sidebar { width: 240px; background: var(--navy); color: #c6cde8; flex-shrink: 0; display: flex; flex-direction: column; }
.sidebar .brand { display: flex; align-items: center; gap: 10px; padding: 20px 20px; font-weight: 800; color: #fff; border-bottom: 1px solid rgba(255,255,255,.08); }
.sidebar .brand-badge { width: 32px; height: 32px; border-radius: 8px; background: linear-gradient(135deg,#2563eb,#7c3aed); display: flex; align-items: center; justify-content: center; font-size: 13px; color: #fff; }
.sidebar nav { padding: 16px 12px; flex: 1; }
.sidebar nav a { display: flex; align-items: center; gap: 12px; padding: 11px 14px; border-radius: 8px; font-size: 14px; font-weight: 600; margin-bottom: 2px; color: #b6bede; }
.sidebar nav a:hover { background: rgba(255,255,255,.06); color: #fff; }
.sidebar nav a.active { background: rgba(255,255,255,.12); color: #fff; }
.sidebar .sidebar-foot { padding: 16px 20px; border-top: 1px solid rgba(255,255,255,.08); font-size: 13px; }
.sidebar .sidebar-foot .who { color: #fff; font-weight: 650; margin-bottom: 8px; }
.sidebar .sidebar-foot a { color: #b6bede; display: flex; align-items: center; gap: 8px; }
.sidebar .sidebar-foot a:hover { color: #fff; }

.admin-main { flex: 1; min-width: 0; }
.admin-topbar { background: #fff; border-bottom: 1px solid var(--gray-100); padding: 18px 32px; display: flex; align-items: center; justify-content: space-between; }
.admin-topbar h1 { font-size: 20px; margin: 0; }
.admin-content { padding: 28px 32px; }

/* Cards */
.card { background: #fff; border: 1px solid var(--gray-100); border-radius: var(--radius); padding: 22px; box-shadow: var(--shadow-sm); }
.card + .card { margin-top: 20px; }
.stat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; margin-bottom: 24px; }
.stat-card { background: #fff; border: 1px solid var(--gray-100); border-radius: var(--radius); padding: 20px; }
.stat-card .label { font-size: 12.5px; color: var(--gray-500); font-weight: 650; text-transform: uppercase; letter-spacing: .03em; }
.stat-card .value { font-size: 28px; font-weight: 800; margin-top: 6px; }
.stat-card .icon-wrap { width: 36px; height: 36px; border-radius: 8px; display: flex; align-items: center; justify-content: center; margin-bottom: 10px; }

/* Buttons */
.btn { display: inline-flex; align-items: center; gap: 7px; padding: 10px 18px; border-radius: 8px; font-weight: 650; font-size: 14px; border: 1px solid transparent; cursor: pointer; }
.btn-primary { background: var(--blue); color: #fff; } .btn-primary:hover { background: var(--blue-dark); }
.btn-outline { background: #fff; border-color: var(--gray-300); color: var(--ink); } .btn-outline:hover { border-color: var(--gray-500); }
.btn-danger { background: #fff; border-color: #fecdca; color: var(--red); } .btn-danger:hover { background: #fef3f2; }
.btn-sm { padding: 6px 12px; font-size: 12.5px; border-radius: 6px; }
.btn[disabled] { opacity: .5; cursor: not-allowed; }

/* Tables */
table.grid { width: 100%; border-collapse: collapse; }
table.grid th { text-align: left; font-size: 12px; text-transform: uppercase; letter-spacing: .03em; color: var(--gray-500); padding: 12px 14px; border-bottom: 1px solid var(--gray-100); background: var(--gray-50); }
table.grid td { padding: 14px; border-bottom: 1px solid var(--gray-100); font-size: 14px; vertical-align: middle; }
table.grid tr:last-child td { border-bottom: none; }
table.grid tr:hover td { background: #fafbff; }
.row-actions { display: flex; gap: 8px; }

/* Forms */
label { display: block; font-size: 13px; font-weight: 650; margin-bottom: 6px; color: var(--gray-700); }
input[type=text], input[type=email], input[type=tel], input[type=number], input[type=password], input[type=search], textarea, select {
    width: 100%; padding: 10px 12px; border: 1px solid var(--gray-300); border-radius: 8px; font-size: 14px; font-family: inherit;
}
input:focus, textarea:focus, select:focus { outline: 2px solid var(--blue); outline-offset: 1px; border-color: var(--blue); }
.form-group { margin-bottom: 16px; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-grid.cols-3 { grid-template-columns: 1fr 1fr 1fr; }
.form-group.full { grid-column: 1 / -1; }
.help-text { font-size: 12.5px; color: var(--gray-500); margin-top: 5px; }
.checkbox-row { display: flex; align-items: center; gap: 8px; }
.checkbox-row input { width: auto; }

/* Alerts / badges */
.alert { padding: 12px 16px; border-radius: 8px; font-size: 13.5px; margin-bottom: 18px; }
.alert-success { background: #ecfdf3; color: #067647; border: 1px solid #abefc6; }
.alert-error { background: #fef3f2; color: #b42318; border: 1px solid #fecdca; }
.alert-info { background: #eff8ff; color: #175cd3; border: 1px solid #b2ddff; }
.badge-status { display: inline-block; font-size: 11.5px; font-weight: 700; padding: 4px 10px; border-radius: 100px; text-transform: capitalize; }
.status-new { background: #eff8ff; color: #175cd3; }
.status-contacted { background: #fef6e7; color: #b45309; }
.status-quoted { background: #f5f0ff; color: #7c3aed; }
.status-invoiced { background: #fef3f2; color: #b42318; }
.status-paid, .status-completed { background: #ecfdf3; color: #067647; }
.status-cancelled { background: var(--gray-100); color: var(--gray-500); }
.pill { display: inline-block; font-size: 11.5px; font-weight: 700; padding: 4px 10px; border-radius: 100px; background: var(--gray-100); color: var(--gray-700); }

.flex-between { display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; }
.mt-24 { margin-top: 24px; } .mb-24 { margin-bottom: 24px; }
.text-muted { color: var(--gray-500); }
.empty-state { text-align: center; padding: 60px 20px; color: var(--gray-500); }
.tier-editor-row { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr 1fr 1fr 40px; gap: 10px; align-items: center; margin-bottom: 10px; }
.tier-editor-row input, .tier-editor-row select { font-size: 13px; padding: 8px 10px; }

@media (max-width: 960px) {
    .sidebar { display: none; }
    .stat-grid { grid-template-columns: 1fr 1fr; }
    .form-grid { grid-template-columns: 1fr; }
    .tier-editor-row { grid-template-columns: 1fr 1fr; }
}