:root {
    --bg: #f4f5f7;
    --card: #ffffff;
    --text: #1f2330;
    --muted: #7a8194;
    --border: #e1e4ea;
    --accent: #3b6ef5;
    --accent-soft: #e8eefe;
    --danger: #d64545;
    --ok: #2e9e5b;
    --radius: 10px;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
}

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

header.top {
    background: var(--card);
    border-bottom: 1px solid var(--border);
    padding: 14px 24px;
    display: flex;
    align-items: center;
    gap: 24px;
}
header.top h1 { font-size: 18px; margin: 0; }
header.top nav a { margin-right: 16px; color: var(--muted); font-weight: 500; }
header.top nav a.active { color: var(--accent); }

main { max-width: 1200px; margin: 24px auto; padding: 0 16px; }

.layout { display: grid; grid-template-columns: 1fr 340px; gap: 20px; align-items: start; }
@media (max-width: 900px) { .layout { grid-template-columns: 1fr; } }

.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 18px;
}
.card h2 { margin: 0 0 14px; font-size: 17px; }

/* Month navigation */
.month-nav { display: flex; align-items: center; justify-content: space-between; margin-bottom: 14px; }
.month-nav h2 { margin: 0; font-size: 22px; }
.month-nav .btns { display: flex; gap: 6px; }

.btn {
    display: inline-block;
    border: 1px solid var(--border);
    background: var(--card);
    color: var(--text);
    padding: 7px 14px;
    border-radius: 8px;
    font-size: 14px;
    cursor: pointer;
}
.btn:hover { background: var(--bg); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.primary:hover { filter: brightness(0.95); }
.btn.danger { color: var(--danger); border-color: #f0c4c4; padding: 4px 10px; font-size: 13px; }
.btn.danger:hover { background: #fdf0f0; }

/* Calendar grid */
.calendar { display: grid; grid-template-columns: repeat(7, 1fr); gap: 1px; background: var(--border); border: 1px solid var(--border); border-radius: 8px; overflow: hidden; }
.calendar .dow { background: var(--bg); text-align: center; font-size: 12px; font-weight: 600; color: var(--muted); padding: 8px 0; text-transform: uppercase; }
.calendar .day {
    background: var(--card);
    min-height: 104px;
    padding: 6px;
    display: block;
    color: var(--text);
    position: relative;
}
.calendar .day:hover { background: #fafbfd; }
.calendar .day.other { background: #fafafa; color: #b8bcc8; }
.calendar .day.weekend .num { color: var(--muted); }
.calendar .day.today .num { background: var(--accent); color: #fff; }
.calendar .day.selected { outline: 2px solid var(--accent); outline-offset: -2px; }
.calendar .num {
    display: inline-flex; align-items: center; justify-content: center;
    width: 26px; height: 26px; border-radius: 50%;
    font-size: 13px; font-weight: 600;
}
.calendar .more { font-size: 11px; color: var(--muted); margin-top: 3px; display: block; }

/* Forms */
label { display: block; font-size: 13px; font-weight: 600; margin: 10px 0 4px; }
input, select {
    width: 100%;
    padding: 8px 10px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 14px;
    font-family: inherit;
}
input:focus, select:focus { outline: 2px solid var(--accent-soft); border-color: var(--accent); }
.row { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
form .btn.primary { margin-top: 14px; width: 100%; }

/* Lists / tables */
.booking { border: 1px solid var(--border); border-radius: 8px; padding: 10px; margin-bottom: 8px; display: flex; justify-content: space-between; gap: 8px; align-items: center; }
.booking .time { font-weight: 600; font-size: 14px; }
.booking .meta { font-size: 13px; color: var(--muted); }
.empty { color: var(--muted); font-size: 14px; }

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

.flash { padding: 10px 14px; border-radius: 8px; margin-bottom: 16px; font-size: 14px; }
.flash.ok { background: #e7f6ed; color: var(--ok); }
.flash.error { background: #fdecec; color: var(--danger); }

hr { border: 0; border-top: 1px solid var(--border); margin: 18px 0; }

/* Calendar page: fill the whole window */
body.cal-page { min-height: 100vh; display: flex; flex-direction: column; }
body.cal-page main { max-width: none; width: 100%; margin: 0; padding: 20px 24px; flex: 1; display: flex; flex-direction: column; }
body.cal-page .layout { flex: 1; align-items: stretch; grid-template-columns: 1fr 360px; }
body.cal-page .layout > section.card { display: flex; flex-direction: column; }
body.cal-page .calendar { flex: 1; grid-template-rows: auto; grid-auto-rows: minmax(110px, 1fr); }
body.cal-page .calendar .day { min-height: 0; padding: 8px; }
body.cal-page .calendar .num { font-size: 14px; width: 28px; height: 28px; }
body.cal-page .calendar .ev { font-size: 12.5px; padding: 3px 6px; }
body.cal-page .layout > aside.card { align-self: start; }
@media (max-width: 900px) {
    body.cal-page .layout { grid-template-columns: 1fr; }
    body.cal-page .calendar { grid-auto-rows: minmax(90px, auto); }
}

/* Admin login */
.card.login { max-width: 380px; margin: 60px auto; }

/* User colours: each booking element sets --c to its user's colour */
.calendar .ev {
    display: block;
    background: color-mix(in srgb, var(--c, var(--accent)) 16%, #fff);
    border-left: 3px solid var(--c, var(--accent));
    color: var(--text);
    font-size: 11.5px;
    border-radius: 4px;
    padding: 2px 5px;
    margin-top: 3px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.calendar .ev .who { font-weight: 600; color: color-mix(in srgb, var(--c, var(--accent)) 75%, #000); }
.booking { border-left: 4px solid var(--c, var(--border)); }
.dot {
    display: inline-block; width: 10px; height: 10px; border-radius: 50%;
    background: var(--c, var(--accent)); margin-right: 6px; vertical-align: middle;
}
input.swatch { width: 44px; height: 30px; padding: 2px; cursor: pointer; }