:root {
  --bg: #f5f6f8; --surface: #ffffff; --surface-2: #f0f2f5; --border: #e3e6eb; --text: #16181d; --muted: #666c78;
  --accent: #4f46e5; --accent-hover: #4338ca; --accent-soft: #eef0ff; --danger: #d1343f; --danger-soft: #fdeceb; --ok: #15803d; --ok-soft: #e7f6ec; --warn: #b45309; --warn-soft: #fff4e0;
  --shadow: 0 1px 2px rgba(16,18,24,.05), 0 4px 16px rgba(16,18,24,.06); --radius: 12px; --font: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
@media (prefers-color-scheme: dark) { :root {
  --bg: #0f1115; --surface: #171a21; --surface-2: #1f232c; --border: #2a2f3a; --text: #e8eaf0; --muted: #9aa1ad;
  --accent: #7c74ff; --accent-hover: #918bff; --accent-soft: #23244a; --danger: #ff6b6b; --danger-soft: #3a1d1f; --ok: #4ade80; --ok-soft: #14301f; --warn: #fbbf24; --warn-soft: #3a2c0d;
  --shadow: 0 1px 2px rgba(0,0,0,.4), 0 6px 20px rgba(0,0,0,.35);
} }
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--text); font: 15px/1.5 var(--font); }
a { color: var(--accent); text-decoration: none; } a:hover { text-decoration: underline; }
h1 { font-size: 24px; font-weight: 650; letter-spacing: -.01em; margin: 0 0 6px; }
h2 { font-size: 17px; font-weight: 600; margin: 0 0 12px; }
p { margin: 0 0 12px; } .muted { color: var(--muted); } .small { font-size: 13px; }
.container { max-width: 1080px; margin: 0 auto; padding: 24px 16px 64px; }

/* nav */
.nav { background: var(--surface); border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 10; }
.nav .inner { max-width: 1080px; margin: 0 auto; padding: 0 16px; height: 56px; display: flex; align-items: center; gap: 20px; }
.brand { font-weight: 700; color: var(--text); display: flex; align-items: center; gap: 10px; }
.brand .dot { width: 22px; height: 22px; border-radius: 7px; background: linear-gradient(135deg, var(--accent), #14b8a6); }
.nav-links { display: flex; gap: 4px; flex: 1; } .nav-links a { color: var(--muted); padding: 6px 10px; border-radius: 8px; font-weight: 500; }
.nav-links a:hover { background: var(--surface-2); text-decoration: none; color: var(--text); } .nav-links a.active { color: var(--text); background: var(--surface-2); }
.nav .who { color: var(--muted); font-size: 13px; } .nav form { margin: 0; }
@media (max-width: 640px) { .nav .who { display: none; } .nav-links a { padding: 6px 8px; } }

/* cards + layout */
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; box-shadow: var(--shadow); }
.grid { display: grid; gap: 16px; } .grid-2 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); } .grid-links { grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); }
.stack { display: flex; flex-direction: column; gap: 16px; } .row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; } .spread { justify-content: space-between; }
.page-head { display: flex; justify-content: space-between; align-items: flex-end; gap: 16px; margin-bottom: 20px; flex-wrap: wrap; }

/* buttons + forms */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 9px 14px; border-radius: 9px; border: 1px solid var(--border); background: var(--surface); color: var(--text); font: inherit; font-weight: 550; cursor: pointer; line-height: 1.2; }
.btn:hover { background: var(--surface-2); text-decoration: none; } .btn:disabled { opacity: .55; cursor: default; }
.btn-primary { background: var(--accent); border-color: var(--accent); color: #fff; } .btn-primary:hover { background: var(--accent-hover); }
.btn-danger { color: var(--danger); } .btn-danger:hover { background: var(--danger-soft); }
.btn-sm { padding: 5px 10px; font-size: 13px; border-radius: 7px; } .btn-block { width: 100%; } .btn-link { border: 0; background: none; color: var(--accent); padding: 0; }
label { display: block; font-size: 13px; font-weight: 550; margin-bottom: 6px; color: var(--text); }
.field { margin-bottom: 14px; } .hint { font-size: 12.5px; color: var(--muted); margin-top: 5px; }
input[type=text], input[type=email], input[type=password], input[type=url], input[type=time], input[type=date], select, textarea {
  width: 100%; padding: 9px 11px; border: 1px solid var(--border); border-radius: 9px; background: var(--surface); color: var(--text); font: inherit; }
input:focus, select:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: 0; border-color: var(--accent); }
input.code { font-size: 26px; letter-spacing: .4em; text-align: center; font-variant-numeric: tabular-nums; }
textarea { min-height: 80px; resize: vertical; }
.alert { padding: 10px 12px; border-radius: 9px; font-size: 14px; margin-bottom: 14px; border: 1px solid transparent; }
.alert-error { background: var(--danger-soft); color: var(--danger); } .alert-ok { background: var(--ok-soft); color: var(--ok); } .alert-warn { background: var(--warn-soft); color: var(--warn); } .alert-info { background: var(--accent-soft); color: var(--accent); }
.badge { display: inline-block; font-size: 11.5px; font-weight: 600; padding: 2px 8px; border-radius: 999px; background: var(--surface-2); color: var(--muted); letter-spacing: .02em; text-transform: uppercase; }
.badge-ok { background: var(--ok-soft); color: var(--ok); } .badge-warn { background: var(--warn-soft); color: var(--warn); } .badge-accent { background: var(--accent-soft); color: var(--accent); } .badge-danger { background: var(--danger-soft); color: var(--danger); }

/* auth pages */
.auth { min-height: 100vh; display: grid; place-items: center; padding: 24px 16px; }
.auth .card { width: 100%; max-width: 400px; padding: 28px; } .auth .brand { justify-content: center; margin-bottom: 20px; font-size: 17px; }
.auth h1 { font-size: 20px; text-align: center; } .auth .lead { text-align: center; color: var(--muted); margin-bottom: 20px; }
.auth .alt { text-align: center; margin-top: 18px; font-size: 14px; color: var(--muted); }
.steps { display: flex; gap: 6px; justify-content: center; margin-bottom: 18px; } .steps span { width: 28px; height: 4px; border-radius: 2px; background: var(--border); } .steps span.on { background: var(--accent); }

/* dashboard tiles */
.tile { display: flex; flex-direction: column; gap: 6px; padding: 18px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); color: var(--text); box-shadow: var(--shadow); transition: transform .12s, border-color .12s; }
.tile:hover { text-decoration: none; transform: translateY(-2px); border-color: var(--accent); }
.tile .t { font-weight: 600; font-size: 16px; display: flex; justify-content: space-between; align-items: center; } .tile .d { color: var(--muted); font-size: 13.5px; }
.tile .icon { width: 36px; height: 36px; border-radius: 9px; display: grid; place-items: center; background: var(--accent-soft); color: var(--accent); font-weight: 700; margin-bottom: 4px; }
.list { list-style: none; margin: 0; padding: 0; } .list li { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding: 10px 0; border-top: 1px solid var(--border); } .list li:first-child { border-top: 0; padding-top: 0; }
.avatar { width: 30px; height: 30px; border-radius: 50%; background: var(--accent-soft); color: var(--accent); display: grid; place-items: center; font-weight: 700; font-size: 12px; flex: none; }
table { width: 100%; border-collapse: collapse; font-size: 14px; } th { text-align: left; font-size: 12px; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); padding: 8px 8px; border-bottom: 1px solid var(--border); } td { padding: 10px 8px; border-bottom: 1px solid var(--border); vertical-align: middle; }
tr:last-child td { border-bottom: 0; } .actions { display: flex; gap: 6px; flex-wrap: wrap; } .actions form { margin: 0; }
details summary { cursor: pointer; font-weight: 550; } details { margin-top: 8px; }

/* availability editor */
.days { display: grid; gap: 10px; } .day { display: grid; grid-template-columns: 110px 1fr; gap: 12px; align-items: start; padding: 10px 0; border-top: 1px solid var(--border); }
.day .dn { font-weight: 600; padding-top: 6px; } .win { display: flex; gap: 8px; align-items: center; margin-bottom: 6px; } .win select { width: 110px; padding: 6px 8px; } .win .rm { color: var(--muted); }
.presets { display: flex; gap: 6px; flex-wrap: wrap; }
@media (max-width: 560px) { .day { grid-template-columns: 1fr; } }

/* calendar */
.cal-tools { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; margin-bottom: 14px; } .cal-tools select { width: auto; }
.cal-wrap { overflow: auto; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); box-shadow: var(--shadow); }
.cal { display: grid; grid-template-columns: 56px repeat(7, minmax(84px, 1fr)); font-size: 12px; min-width: 700px; }
.cal .hd { position: sticky; top: 0; background: var(--surface); z-index: 2; padding: 10px 6px 8px; text-align: center; font-weight: 600; border-bottom: 1px solid var(--border); border-left: 1px solid var(--border); }
.cal .hd.today { color: var(--accent); } .cal .hd small { display: block; color: var(--muted); font-weight: 500; }
.cal .tm { color: var(--muted); font-size: 11px; text-align: right; padding-right: 8px; border-top: 1px solid var(--border); height: 22px; line-height: 20px; }
.cal .tm.half { border-top-color: transparent; color: transparent; }
.cal .sl { height: 22px; border-left: 1px solid var(--border); border-top: 1px solid var(--border); cursor: pointer; position: relative; }
.cal .sl.half { border-top-color: color-mix(in srgb, var(--border) 40%, transparent); } .cal .sl.past { cursor: default; background-image: repeating-linear-gradient(135deg, transparent 0 6px, rgba(128,128,128,.07) 6px 8px); }
.cal .sl:hover:not(.past) { outline: 2px solid var(--accent); outline-offset: -2px; z-index: 1; }
.cal .sl.ev { box-shadow: inset 0 0 0 2px var(--warn); }
.legend { display: flex; gap: 10px; align-items: center; font-size: 12.5px; color: var(--muted); margin-top: 10px; flex-wrap: wrap; } .legend i { display: inline-block; width: 14px; height: 14px; border-radius: 3px; border: 1px solid var(--border); }
.members { display: flex; gap: 8px; flex-wrap: wrap; } .chip { display: inline-flex; align-items: center; gap: 6px; padding: 4px 10px; border-radius: 999px; border: 1px solid var(--border); background: var(--surface); font-size: 13px; cursor: pointer; user-select: none; }
.chip input { margin: 0; } .chip.off { color: var(--muted); }
.tip { position: fixed; pointer-events: none; background: var(--text); color: var(--bg); padding: 6px 9px; border-radius: 7px; font-size: 12px; z-index: 50; max-width: 260px; display: none; box-shadow: var(--shadow); }

/* modal */
.modal { position: fixed; inset: 0; background: rgba(10,12,18,.5); display: none; place-items: center; z-index: 40; padding: 16px; }
.modal.open { display: grid; } .modal .card { width: 100%; max-width: 440px; }
.modal h2 { margin-bottom: 4px; }