:root {
    --brand: #633752;
    --brand-light: #8a5578;
    --bg: #f7f5f6;
    --card: #ffffff;
    --text: #2b2b2b;
    --muted: #756b73;
    --border: #e6dfe3;
    --success: #2e7d32;
    font-family: 'Work Sans', Arial, sans-serif;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: 'Work Sans', Arial, sans-serif;
}

a { color: var(--brand); }

.topbar {
    background: var(--brand);
    color: #fff;
    padding: 12px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px 16px;
}

.topbar a { color: #fff; text-decoration: none; margin-left: 16px; font-size: 14px; }
.topbar .brand { font-weight: 600; font-size: 18px; text-decoration: none; display: flex; align-items: center; }
.topbar .brand-links { display: flex; flex-wrap: wrap; }

.topbar-logo {
    height: 36px;
    max-width: 220px;
    width: auto;
    object-fit: contain;
    display: block;
}
.brand-text { font-weight: 600; font-size: 18px; }

.container { max-width: 960px; margin: 0 auto; padding: 24px; }
.container.wide { max-width: 1200px; }

/* ---------------- Mobile responsiveness ---------------- */
@media (max-width: 640px) {
    .topbar { padding: 10px 16px; }
    .topbar-logo { height: 28px; max-width: 160px; }
    .brand-text { font-size: 16px; }
    .topbar a { margin-left: 0; margin-right: 12px; font-size: 13px; }
    .topbar .brand-links { gap: 4px 12px; }

    .container, .container.wide { padding: 14px; }
    .card { padding: 14px 16px; }

    h1 { font-size: 22px; }
    h2 { font-size: 19px; }
    h3 { font-size: 16px; }

    .row { gap: 10px; }
    .row > * { min-width: 100%; }

    .grand-total .amount { font-size: 22px; }

    table { display: block; overflow-x: auto; white-space: nowrap; }

    .trip-grid { grid-template-columns: 1fr; }
}

.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 20px 24px;
    margin-bottom: 20px;
}

h1, h2, h3 { color: var(--brand); }

.trip-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px,1fr)); gap: 16px; }
.trip-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 18px;
    text-decoration: none;
    color: var(--text);
    display: block;
    transition: box-shadow .15s ease;
}
.trip-card:hover { box-shadow: 0 4px 14px rgba(99,55,82,0.15); }
.trip-card .tag {
    display: inline-block;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: .04em;
    background: #f1e8ee;
    color: var(--brand);
    padding: 2px 8px;
    border-radius: 20px;
    margin-bottom: 8px;
}

label { display: block; font-size: 13px; font-weight: 600; margin: 12px 0 4px; color: var(--muted); }
input[type=text], input[type=number], input[type=password], input[type=email], select, textarea {
    width: 100%;
    padding: 9px 10px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 14px;
    font-family: inherit;
}
.row { display: flex; gap: 16px; flex-wrap: wrap; }
.row > * { flex: 1; min-width: 160px; }

button, .btn {
    background: var(--brand);
    color: #fff;
    border: none;
    padding: 10px 18px;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    display: inline-block;
    margin-top: 14px;
}
button:hover, .btn:hover { background: var(--brand-light); }
.btn-secondary { background: #fff; color: var(--brand); border: 1px solid var(--brand); }
.btn-danger { background: #a83246; }
.btn-small { padding: 5px 10px; font-size: 12px; margin-top: 0; }

table { width: 100%; border-collapse: collapse; margin-top: 10px; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border); font-size: 14px; }
th { color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: .03em; }

.breakdown-group { margin-bottom: 14px; }
.breakdown-group h4 { margin: 0 0 6px; color: var(--brand); font-size: 14px; }
.breakdown-row { display: flex; justify-content: space-between; font-size: 14px; padding: 3px 0; }
.breakdown-row.subtotal { font-weight: 600; border-top: 1px solid var(--border); margin-top: 4px; padding-top: 6px; }
.waterfall-step { display: flex; justify-content: space-between; padding: 6px 0; border-bottom: 1px dashed var(--border); font-size: 14px; }
.waterfall-step .running { color: var(--muted); font-size: 12px; }
.grand-total {
    background: #f1e8ee;
    border-radius: 8px;
    padding: 16px;
    margin-top: 12px;
    text-align: right;
}
.grand-total .amount { font-size: 26px; font-weight: 700; color: var(--brand); }
.grand-total .per-person { font-size: 13px; color: var(--muted); }

.badge { display:inline-block; padding:2px 8px; border-radius:20px; font-size:11px; font-weight:600; }
.badge.on { background:#e3f1e5; color: var(--success); }
.badge.off { background:#f1e3e3; color:#a83246; }

.flash { padding: 10px 14px; border-radius: 6px; margin-bottom: 16px; font-size: 14px; }
.flash.success { background:#e3f1e5; color:#2e7d32; }
.flash.error { background:#f8dede; color:#a83246; }

.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
@media (max-width: 700px) { .two-col { grid-template-columns: 1fr; } }