:root {
    --bg: #f7f7f5;
    --fg: #1a1a1a;
    --muted: #666;
    --border: #d8d8d4;
    --accent: #1f6feb;
    --accent-fg: #ffffff;
    --error: #b3261e;
    --error-bg: #fde8e6;
    --warning: #fff8c5;
    --success: #157f3a;
    --code-bg: #efeee8;
    --radius: 6px;
    --pad: 16px;
    --max-w: 880px;
    --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

html, body {
    margin: 0;
    padding: 0;
    background: var(--bg);
    color: var(--fg);
    font-family: var(--font);
    font-size: 16px;
    line-height: 1.5;
}

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

.container {
    max-width: var(--max-w);
    margin: 0 auto;
    padding: 24px var(--pad) 64px;
}

.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 24px;
    background: white;
    border-bottom: 1px solid var(--border);
}

.topbar .brand {
    font-weight: 600;
    color: var(--fg);
    font-size: 18px;
}

.topbar nav {
    display: flex;
    align-items: center;
    gap: 18px;
}

.topbar nav a, .topbar nav button.link {
    color: var(--fg);
    background: none;
    border: 0;
    padding: 4px 0;
    font: inherit;
    cursor: pointer;
    border-bottom: 2px solid transparent;
}
.topbar nav a:hover { text-decoration: none; border-bottom-color: var(--border); }
.topbar nav a.active {
    font-weight: 600;
    border-bottom-color: var(--accent);
}

.topbar nav .btn-link {
    background: var(--accent);
    color: var(--accent-fg);
    padding: 6px 12px;
    border-radius: var(--radius);
    border-bottom: 0;
}
.topbar nav .btn-link:hover { border-bottom: 0; filter: brightness(0.97); text-decoration: none; }

.muted { color: var(--muted); }
code { background: var(--code-bg); padding: 1px 6px; border-radius: 3px; font-family: ui-monospace, Menlo, monospace; font-size: 0.95em; }
small { font-size: 0.85em; }

h1 { font-size: 28px; margin: 8px 0 16px; }
h2 { font-size: 20px; margin: 24px 0 8px; }

.form {
    display: flex;
    flex-direction: column;
    gap: 14px;
    max-width: 420px;
}

.form label {
    display: flex;
    flex-direction: column;
    gap: 4px;
    font-size: 14px;
    color: var(--muted);
}

.form input[type="text"],
.form input[type="email"],
.form input[type="password"],
.form input[type="date"],
.form input[type="number"],
.form select,
.form textarea {
    font: inherit;
    padding: 8px 10px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: white;
    color: var(--fg);
}

.form .error {
    color: var(--error);
    font-size: 13px;
}

.alert.error {
    background: var(--error-bg);
    color: var(--error);
    padding: 10px 12px;
    border-radius: var(--radius);
}

.alert.info {
    background: #e3f1fb;
    color: #0a5a8e;
    padding: 10px 12px;
    border-radius: var(--radius);
    font-size: 14px;
}

.field-low {
    background: #fff8c5 !important;
    border-color: #d4a72c !important;
}

.field-medium {
    background: #fafafa;
}

.conf-tag {
    display: inline-block;
    margin-left: 6px;
    padding: 1px 8px;
    border-radius: 100px;
    font-size: 11px;
    font-weight: 500;
    vertical-align: middle;
}
.conf-high   { background: #d8f0e0; color: #0e6b30; }
.conf-medium { background: #ffe9c2; color: #6a4500; }
.conf-low    { background: #fff1a8; color: #4a3c00; }

.btn {
    background: var(--accent);
    color: var(--accent-fg);
    border: 0;
    padding: 10px 18px;
    border-radius: var(--radius);
    font: inherit;
    cursor: pointer;
}

.btn.secondary {
    background: white;
    color: var(--fg);
    border: 1px solid var(--border);
}

.btn:hover { filter: brightness(0.97); }

.inline { display: inline; margin: 0; padding: 0; }

.alias-box {
    background: var(--code-bg);
    padding: 12px 16px;
    border-radius: var(--radius);
    font-family: ui-monospace, Menlo, monospace;
    font-size: 16px;
    display: inline-block;
}

table.receipts {
    width: 100%;
    border-collapse: collapse;
    background: white;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
}
table.receipts th, table.receipts td {
    padding: 10px 14px;
    text-align: left;
    border-bottom: 1px solid var(--border);
    font-size: 14px;
}
table.receipts th { background: #fafaf7; font-weight: 600; color: var(--muted); }
table.receipts tr:last-child td { border-bottom: 0; }

.status-pill {
    display: inline-block;
    padding: 2px 10px;
    border-radius: 100px;
    font-size: 12px;
    font-weight: 500;
}
.status-pending  { background: var(--warning); color: #4a3c00; }
.status-approved { background: #d8f0e0; color: #0e6b30; }
.status-failed   { background: var(--error-bg); color: var(--error); }

.table-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; }
.table-scroll table.receipts { min-width: 640px; }

.review-grid {
    display: grid;
    grid-template-columns: 1fr 360px;
    gap: 24px;
    align-items: start;
}
.review-grid .pdf-pane {
    background: white;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    min-height: 720px;
}
.review-grid .pdf-pane embed,
.review-grid .pdf-pane iframe {
    width: 100%;
    height: 720px;
    display: block;
    border: 0;
}
.review-grid .form-pane {
    background: white;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 18px;
}
@media (max-width: 800px) {
    .review-grid { grid-template-columns: 1fr; }
    .review-grid .pdf-pane { min-height: 0; }
    .review-grid .pdf-pane embed,
    .review-grid .pdf-pane iframe { height: 320px; }
    .review-grid .form-pane { order: -1; }
}

.site-footer {
    border-top: 1px solid var(--border);
    background: white;
    padding: 18px var(--pad);
    margin-top: 48px;
    color: var(--muted);
    font-size: 13px;
    display: flex;
    flex-wrap: wrap;
    gap: 8px 24px;
    justify-content: space-between;
    align-items: center;
}
.site-footer nav { display: flex; flex-wrap: wrap; gap: 16px; }
.site-footer a { color: var(--muted); }
.site-footer a:hover { color: var(--fg); text-decoration: underline; }