:root {
    --bg-0: #f4f5f7;
    --bg-1: #ffffff;
    --bg-2: #f8fafc;
    --bg-3: #eef0f3;
    --text-main: #18181b;
    --text-muted: #6b7280;
    --accent: #2563eb;
    --accent-hover: #1d4ed8;
    --danger: #dc2626;
    --danger-hover: #b91c1c;
    --success: #16a34a;
    --border: #e2e4e9;
    --radius: 8px;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    background: var(--bg-0);
    color: var(--text-main);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-size: 14px;
}

.topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px 24px;
    background: var(--bg-1);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 10;
}
.topbar h1 { font-size: 18px; margin: 0; }
.logout-link {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 13px;
    padding: 6px 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
}
.logout-link:hover { color: var(--text-main); border-color: var(--text-muted); }

main {
    max-width: 1100px;
    margin: 0 auto;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.card {
    background: var(--bg-1);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.04);
}
.card h2 { margin-top: 0; font-size: 16px; }
.hint { color: var(--text-muted); font-size: 12.5px; margin-top: -6px; }

.field { margin-bottom: 12px; display: flex; flex-direction: column; gap: 4px; max-width: 480px; }
.field label { font-size: 12.5px; color: var(--text-muted); }
input[type="text"], input[type="date"], input[type="time"], input[type="password"], select {
    background: var(--bg-2);
    border: 1px solid var(--border);
    color: var(--text-main);
    border-radius: 6px;
    padding: 8px 10px;
    font-size: 13.5px;
    outline: none;
}
input:focus, select:focus { border-color: var(--accent); }

.table-wrap { overflow-x: auto; margin: 10px 0; }
table { border-collapse: collapse; width: 100%; min-width: 720px; }
th, td { padding: 6px 8px; text-align: left; border-bottom: 1px solid var(--border); }
th { color: var(--text-muted); font-weight: 500; font-size: 12px; text-transform: uppercase; letter-spacing: .02em; }
#rows-table input { width: 100%; min-width: 110px; }
#rows-table td:last-child { width: 32px; }

.row-remove-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 18px;
    line-height: 1;
    cursor: pointer;
    padding: 4px 8px;
}
.row-remove-btn:hover { color: var(--danger); }

.btn-primary, .btn-secondary, .btn-small {
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 13.5px;
    padding: 9px 16px;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); }
.btn-secondary { background: var(--bg-3); color: var(--text-main); border: 1px solid var(--border); }
.btn-secondary:hover { border-color: var(--text-muted); }
.btn-small { background: var(--bg-3); color: var(--text-main); padding: 6px 10px; font-size: 12.5px; }
.btn-small:hover { border-color: var(--text-muted); }
.btn-small.danger { background: transparent; color: var(--danger); border: 1px solid rgba(239,68,68,0.4); }
.btn-small.danger:hover { background: rgba(239,68,68,0.1); border-color: var(--danger); }

.form-actions { display: flex; gap: 10px; margin-top: 14px; }
.hidden { display: none !important; }

.form-msg { min-height: 18px; font-size: 12.5px; margin-top: 8px; }
.form-msg.error { color: var(--danger); }
.form-msg.success { color: var(--success); }

.conflict-warning {
    background: rgba(217,119,6,0.08);
    border: 1px solid rgba(217,119,6,0.35);
    color: #92400e;
    border-radius: 8px;
    padding: 10px 14px;
    font-size: 12.5px;
    line-height: 1.6;
    margin: -4px 0 14px 0;
}

.date-group-header {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: .03em;
    margin: 22px 0 10px 0;
    padding-bottom: 6px;
    border-bottom: 1px solid var(--border);
}
.date-group-header:first-child { margin-top: 0; }
.date-group-header.is-today {
    color: var(--accent);
    border-bottom-color: var(--accent);
}

.list-toolbar {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 14px;
}
.list-toolbar #search-input { flex: 1; min-width: 200px; }

.settings-bar {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
    font-size: 12.5px;
    color: var(--text-muted);
    background: var(--bg-2);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 8px 12px;
    margin-bottom: 14px;
}
.settings-bar input[type="number"] {
    width: 64px;
    padding: 5px 8px;
    text-align: center;
}
.settings-bar select {
    background: var(--bg-1);
    border: 1px solid var(--border);
    color: var(--text-main);
    border-radius: 6px;
    padding: 5px 8px;
    font-size: 12.5px;
}
.settings-sep { color: var(--border); margin: 0 2px; }
.settings-msg { font-size: 12.5px; }
.settings-msg.error { color: var(--danger); }
.settings-msg.success { color: var(--success); }

.empty-hint { color: var(--text-muted); font-size: 13px; }

.public-links { color: var(--text-muted); font-size: 12.5px; margin: 0 0 14px 0; }
.public-links a { color: var(--accent); }

.record-card {
    background: var(--bg-2);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 14px 16px;
    margin-bottom: 14px;
    box-shadow: 0 1px 2px rgba(0,0,0,0.03);
}
.record-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 12px; flex-wrap: wrap; }
.record-head h3 { margin: 0 0 2px 0; font-size: 15px; }
.record-note { margin: 0; color: var(--text-muted); font-size: 12.5px; }
.record-status { margin: 2px 0 0 0; color: var(--text-muted); font-size: 11.5px; font-style: normal; }
.record-actions { display: flex; gap: 8px; flex-shrink: 0; }
.record-rows-table { min-width: 640px; }
.record-rows-table th, .record-rows-table td { font-size: 12.5px; }
.record-rows-table tr.row-old td { background: rgba(107,114,128,0.07); }
.record-rows-table tr.row-new td { background: rgba(22,163,74,0.06); }

/* Login page */
.login-body {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100vh;
}
.login-box {
    background: var(--bg-1);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 32px;
    width: 100%;
    max-width: 340px;
    box-shadow: 0 4px 16px rgba(0,0,0,0.06);
}
.login-box h1 { font-size: 17px; margin-top: 0; margin-bottom: 20px; }
.login-box form { display: flex; flex-direction: column; gap: 10px; }
.login-box button { margin-top: 6px; }
.alert { padding: 10px 12px; border-radius: 6px; font-size: 13px; margin-bottom: 14px; }
.alert-error { background: rgba(220,38,38,0.08); color: #b91c1c; border: 1px solid rgba(220,38,38,0.3); }

@media (max-width: 640px) {
    .topbar { padding: 12px 16px; }
    main { padding: 14px; }
    .card { padding: 14px; }
}