:root {
    --bg: #f6f7fb;
    --card: #ffffff;
    --text: #1f2937;
    --muted: #6b7280;
    --border: #e5e7eb;
    --primary: #1d4ed8;
    --primary-dark: #1e40af;
    --success-bg: #ecfdf5;
    --success-border: #10b981;
    --warn-bg: #fffbeb;
    --warn-border: #f59e0b;
    --error-bg: #fef2f2;
    --error-border: #ef4444;
    --danger: #dc2626;
    --danger-dark: #b91c1c;
}

* { box-sizing: border-box; }
body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: Arial, Helvetica, sans-serif;
}
.page-shell {
    max-width: 1280px;
    margin: 0 auto;
    padding: 20px;
}
.topbar, .title-row, .filter-bar, .nav-links, .admin-tabs, .inline-actions {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    flex-wrap: wrap;
}
.topbar {
    margin-bottom: 20px;
}
h1, h2, h3 { margin: 0 0 10px; }
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 20px;
    box-shadow: 0 8px 24px rgba(15, 23, 42, 0.04);
    margin-bottom: 20px;
}
.inner-card { margin-top: 18px; }
.narrow-card { max-width: 420px; margin: 30px auto; }
.narrow-wide-card { max-width: 760px; margin: 0 auto 20px; }
.grid {
    display: grid;
    gap: 20px;
}
.two-col { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.two-col-wide { align-items: start; }
.detail-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 12px;
}
.stack { display: flex; flex-direction: column; }
.gap-sm { gap: 8px; }
.gap-md { gap: 12px; }
.top-gap-sm { margin-top: 8px; }
.top-gap-md { margin-top: 16px; }
.muted { color: var(--muted); }
.small { font-size: 0.92rem; }
label {
    display: flex;
    flex-direction: column;
    gap: 6px;
    font-weight: 600;
}
input, select, button {
    font: inherit;
}
input, select {
    width: 100%;
    padding: 10px 12px;
    border-radius: 10px;
    border: 1px solid #cfd5df;
    background: #fff;
}
button, .button-link, .clinic-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    border: none;
    border-radius: 12px;
    background: var(--primary);
    color: #fff;
    padding: 10px 14px;
    cursor: pointer;
    text-decoration: none;
    font-weight: 700;
}
button:hover, .button-link:hover, .clinic-button:hover {
    background: var(--primary-dark);
    text-decoration: none;
}
.button-link.secondary {
    background: #e5e7eb;
    color: #111827;
}
.danger-button {
    background: var(--danger);
}
.danger-button:hover {
    background: var(--danger-dark);
}
.clinic-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 14px;
    margin-top: 12px;
}
.clinic-button {
    min-height: 84px;
    flex-direction: column;
    align-items: flex-start;
}
.clinic-name { font-size: 1.05rem; }
.alert {
    padding: 12px 14px;
    border-radius: 12px;
    border: 1px solid var(--border);
    margin-bottom: 18px;
    font-weight: 600;
}
.alert-success { background: var(--success-bg); border-color: var(--success-border); }
.alert-error { background: var(--error-bg); border-color: var(--error-border); }
.table-wrap { overflow-x: auto; }
table {
    width: 100%;
    border-collapse: collapse;
    min-width: 900px;
}
th, td {
    padding: 10px 12px;
    border-bottom: 1px solid var(--border);
    text-align: left;
    vertical-align: top;
}
thead th { background: #f9fafb; }
.inline-form {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}
.wide-inline-form input, .wide-inline-form select {
    width: auto;
    min-width: 140px;
}
.success-border { border-left: 6px solid var(--success-border); background: var(--success-bg); }
.warning-border { border-left: 6px solid var(--warn-border); background: var(--warn-bg); }
.empty-state {
    border: 1px dashed var(--border);
    border-radius: 12px;
    padding: 18px;
    color: var(--muted);
}
.simple-list {
    padding-left: 18px;
    margin: 0;
}
.footer {
    text-align: center;
    padding: 10px 0 30px;
}
@media (max-width: 640px) {
    .page-shell { padding: 14px; }
    .card { padding: 16px; }
}

.hidden { display: none; }
.scanner-panel { background: #f9fafb; }
.scanner-reader {
    width: 100%;
    max-width: 420px;
    min-height: 280px;
    border: 1px dashed var(--border);
    border-radius: 14px;
    overflow: hidden;
    background: #111827;
}
@media (max-width: 640px) {
    .scanner-reader { min-height: 240px; }
}