:root {
  --bg: #f6f7f9;
  --card: #ffffff;
  --ink: #1f2733;
  --muted: #67748a;
  --line: #e3e7ee;
  --accent: #2563eb;
  --accent-dark: #1d4ed8;
  --ok: #15803d;
  --ok-bg: #ecfdf3;
  --warn: #b45309;
  --warn-bg: #fffbeb;
  --err: #b91c1c;
  --err-bg: #fef2f2;
  --radius: 10px;
}
* { box-sizing: border-box; }
body { margin: 0; font: 15px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; background: var(--bg); color: var(--ink); }
.wrap { max-width: 1100px; margin: 0 auto; padding: 0 16px; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
h1 { font-size: 1.5rem; margin: 1.2rem 0 .4rem; }
h2 { font-size: 1.15rem; margin: 1.4rem 0 .5rem; }
h3 { font-size: 1rem; margin: 1rem 0 .4rem; }
.muted { color: var(--muted); }
.small { font-size: .85rem; }

.topbar { background: var(--card); border-bottom: 1px solid var(--line); }
.topbar .wrap { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; min-height: 52px; gap: 8px; }
.topbar .brand { font-weight: 700; color: var(--ink); }
.topbar nav { display: flex; gap: 16px; flex-wrap: wrap; }
.foot { padding: 30px 16px; }

.notice { padding: 10px 14px; border-radius: var(--radius); margin: 14px 0; }
.notice-ok { background: var(--ok-bg); color: var(--ok); border: 1px solid #bbf0cd; }
.notice-err { background: var(--err-bg); color: var(--err); border: 1px solid #f5c2c2; }

.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px; margin: 14px 0; }

/* week grid */
.weeknav { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin: 14px 0; flex-wrap: wrap; }
.week { display: grid; grid-template-columns: repeat(7, 1fr); gap: 8px; margin-bottom: 18px; }
@media (max-width: 860px) { .week { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 520px) { .week { grid-template-columns: 1fr; } }
.day { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 10px; min-height: 110px; }
.day.today { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent); }
.day h4 { margin: 0 0 8px; font-size: .85rem; color: var(--muted); text-transform: uppercase; letter-spacing: .03em; }
.day .dayfull { font-size: .85rem; color: var(--muted); }
.slot { display: block; width: 100%; text-align: left; margin: 4px 0; padding: 7px 9px; border-radius: 7px; font-size: .85rem; border: 1px solid var(--line); background: #fafbfc; }
.slot.open { background: var(--ok-bg); border-color: #bbf0cd; color: var(--ok); cursor: pointer; font: inherit; font-size: .85rem; }
.slot.open:hover { background: #dcfce7; }
.slot.taken { background: #eef2ff; border-color: #c7d2fe; color: #3730a3; }
.slot.blocked { background: #f3f4f6; color: #9ca3af; text-decoration: line-through; }
.slot.full, .slot.past { background: #f3f4f6; color: #9ca3af; }
.slot .who { font-weight: 600; }

button, .btn { display: inline-block; background: var(--accent); border: none; color: #fff; padding: 8px 16px; border-radius: 8px; font: inherit; cursor: pointer; text-decoration: none; }
button:hover, .btn:hover { background: var(--accent-dark); text-decoration: none; }
.btn-sm { padding: 3px 10px; font-size: .82rem; border-radius: 6px; }
.btn-ghost { background: transparent; color: var(--accent); border: 1px solid var(--accent); }
.btn-ghost:hover { background: #eff6ff; }
.btn-danger { background: var(--err); }
.btn-danger:hover { background: #991b1b; }
.btn-muted { background: #6b7280; }
.btn-muted:hover { background: #4b5563; }

label { display: block; font-weight: 600; margin: 10px 0 3px; font-size: .9rem; }
input[type=text], input[type=email], input[type=tel], input[type=date], input[type=time],
input[type=password], input[type=number], select, textarea {
  width: 100%; padding: 8px 10px; border: 1px solid var(--line); border-radius: 8px; font: inherit; background: #fff;
}
textarea { min-height: 90px; resize: vertical; }
.checkline { display: flex; align-items: center; gap: 8px; margin: 10px 0; font-size: .92rem; }
.checkline input { width: auto; }
form .actions { margin-top: 16px; display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
.inline-form { display: inline; }

table { width: 100%; border-collapse: collapse; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
th, td { text-align: left; padding: 9px 12px; border-bottom: 1px solid var(--line); font-size: .9rem; vertical-align: top; }
th { background: #fafbfc; font-size: .8rem; text-transform: uppercase; letter-spacing: .03em; color: var(--muted); }
tr:last-child td { border-bottom: none; }

.badge { display: inline-block; padding: 1px 8px; border-radius: 99px; font-size: .75rem; font-weight: 600; }
.badge-ok { background: var(--ok-bg); color: var(--ok); }
.badge-err { background: var(--err-bg); color: var(--err); }
.badge-warn { background: var(--warn-bg); color: var(--warn); }

/* modal */
.modal-backdrop { position: fixed; inset: 0; background: rgba(15,23,42,.45); display: none; align-items: flex-start; justify-content: center; padding: 30px 16px; overflow-y: auto; z-index: 50; }
.modal-backdrop.show { display: flex; }
.modal { background: var(--card); border-radius: 12px; padding: 22px; max-width: 460px; width: 100%; }
.modal h3 { margin-top: 0; }

details.dayadmin { margin-top: 8px; font-size: .85rem; }
details.dayadmin summary { cursor: pointer; color: var(--accent); }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 0 16px; }
@media (max-width: 640px) { .grid2 { grid-template-columns: 1fr; } }
.update { border-left: 3px solid var(--accent); padding-left: 14px; margin: 18px 0; }
.update .when { color: var(--muted); font-size: .82rem; }