/* Public booking microsite (Calendly-style). Self-contained, standalone from the
   app shell. Light + dark (dark applied via html.dark from prefers-color-scheme).
   Palette mirrors the Astra design system (brand #4F7CFF). */

:root {
    --bk-brand: #4F7CFF;
    --bk-brand-2: #8b5cf6;
    --bk-grad: linear-gradient(135deg, #4F7CFF, #8b5cf6);
    --bk-page: #eef1f6;
    --bk-card: #ffffff;
    --bk-elev: #f6f8fc;
    --bk-text: #1c2230;
    --bk-soft: #5b6478;
    --bk-muted: #93a0b4;
    --bk-border: #e3e8f0;
    --bk-border-soft: #eef1f6;
    --bk-success: #22C55E;
    --bk-error: #EF4444;
    --bk-shadow: 0 18px 48px rgba(20, 30, 60, 0.12);
}

html.dark {
    --bk-page: #0b0d12;
    --bk-card: #151a23;
    --bk-elev: #1a1f2b;
    --bk-text: #f3f5f9;
    --bk-soft: #c2c8d2;
    --bk-muted: #8a92a1;
    --bk-border: #283041;
    --bk-border-soft: #1f2633;
    --bk-shadow: 0 18px 48px rgba(0, 0, 0, 0.45);
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: 'Inter', system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
    background: var(--bk-page);
    color: var(--bk-text);
    -webkit-font-smoothing: antialiased;
}

.bk-shell {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 32px 16px;
    gap: 18px;
}

.bk-card {
    width: 100%;
    max-width: 640px;
    background: var(--bk-card);
    border: 1px solid var(--bk-border);
    border-radius: 18px;
    box-shadow: var(--bk-shadow);
    padding: 34px;
    position: relative;
    overflow: hidden;
}
.bk-card::before {
    content: '';
    position: absolute;
    inset: 0 0 auto 0;
    height: 5px;
    background: var(--bk-grad);
}

.bk-foot {
    font-size: 13px;
    color: var(--bk-muted);
}
.bk-foot strong { color: var(--bk-soft); }

h1 { font-size: 23px; font-weight: 700; margin: 0 0 6px; letter-spacing: -0.01em; }
.bk-sub { color: var(--bk-soft); margin: 0; }
.bk-muted { color: var(--bk-muted); }
.bk-opt { color: var(--bk-muted); font-weight: 400; }

/* ---- host landing -------------------------------------------------------- */
.bk-host-head { text-align: center; margin-bottom: 22px; }
.bk-avatar {
    width: 64px; height: 64px; border-radius: 50%;
    background: var(--bk-grad); color: #fff;
    display: flex; align-items: center; justify-content: center;
    font-size: 26px; font-weight: 700; margin: 0 auto 14px;
}
.bk-type-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 12px; }
.bk-type {
    display: flex; align-items: center; gap: 14px;
    padding: 16px 18px; border: 1px solid var(--bk-border); border-radius: 13px;
    text-decoration: none; color: var(--bk-text); background: var(--bk-elev);
    transition: border-color .15s, transform .15s, box-shadow .15s;
}
.bk-type:hover { border-color: var(--bk-brand); transform: translateY(-1px); box-shadow: var(--bk-shadow); }
.bk-type-dot { width: 12px; height: 12px; border-radius: 50%; background: var(--accent, var(--bk-brand)); flex: none; }
.bk-type-body { display: flex; flex-direction: column; gap: 3px; flex: 1; min-width: 0; }
.bk-type-title { font-weight: 600; }
.bk-type-desc { color: var(--bk-soft); font-size: 14px; }
.bk-type-meta { color: var(--bk-muted); font-size: 13px; display: flex; flex-wrap: wrap; gap: 14px; margin-top: 2px; }
.bk-type-meta i { margin-right: 4px; }
.bk-type-arrow { color: var(--bk-muted); }

/* ---- booker (slot picker) ----------------------------------------------- */
.bk-back { display: inline-flex; align-items: center; gap: 8px; color: var(--bk-soft); text-decoration: none; font-size: 14px; margin-bottom: 16px; }
.bk-back:hover { color: var(--bk-brand); }
.bk-type-head { display: flex; gap: 14px; margin-bottom: 20px; }
.bk-type-head .bk-type-dot { margin-top: 6px; }
.bk-type-head .bk-type-desc { color: var(--bk-soft); margin: 8px 0 0; font-size: 14px; }

.bk-pick { display: grid; grid-template-columns: 1fr 1.1fr; gap: 22px; }
@media (max-width: 560px) { .bk-pick { grid-template-columns: 1fr; } }
.bk-pick label { display: block; font-weight: 600; font-size: 13px; margin-bottom: 8px; color: var(--bk-soft); }

input[type=date], input[type=text], input[type=email], textarea {
    width: 100%; padding: 11px 13px; border: 1px solid var(--bk-border); border-radius: 10px;
    background: var(--bk-elev); color: var(--bk-text); font: inherit;
}
html.dark input[type=date] { color-scheme: dark; }
input:focus, textarea:focus { outline: none; border-color: var(--bk-brand); box-shadow: 0 0 0 3px rgba(79, 124, 255, 0.18); }

.bk-slots { display: grid; grid-template-columns: repeat(auto-fill, minmax(84px, 1fr)); gap: 9px; max-height: 280px; overflow-y: auto; }
.bk-slot {
    padding: 11px 6px; border: 1px solid var(--bk-border); border-radius: 10px;
    background: var(--bk-elev); color: var(--bk-text); font-weight: 600; font-size: 14px;
    cursor: pointer; text-align: center; transition: all .12s;
}
.bk-slot:hover { border-color: var(--bk-brand); color: var(--bk-brand); }
.bk-slot.is-active { background: var(--bk-brand); border-color: var(--bk-brand); color: #fff; }

/* ---- invitee form -------------------------------------------------------- */
.bk-form { margin-top: 26px; border-top: 1px solid var(--bk-border-soft); padding-top: 22px; }
.bk-chosen {
    display: flex; align-items: center; gap: 10px; padding: 12px 14px; border-radius: 10px;
    background: rgba(79, 124, 255, 0.10); color: var(--bk-text); font-weight: 600; margin-bottom: 18px;
}
.bk-change { margin-left: auto; background: none; border: none; color: var(--bk-brand); cursor: pointer; font: inherit; font-weight: 600; }
.bk-field { margin-bottom: 15px; }
.bk-field label { display: block; font-weight: 600; font-size: 13px; margin-bottom: 7px; color: var(--bk-soft); }
.bk-submit {
    width: 100%; padding: 13px; border: none; border-radius: 11px; background: var(--bk-grad);
    color: #fff; font: inherit; font-weight: 700; font-size: 15px; cursor: pointer;
    transition: filter .15s, transform .15s;
}
.bk-submit:hover { filter: brightness(1.05); transform: translateY(-1px); }

/* ---- alerts / status ----------------------------------------------------- */
.bk-alert { padding: 12px 14px; border-radius: 10px; margin-bottom: 18px; font-size: 14px; display: flex; gap: 9px; align-items: center; }
.bk-alert-err { background: rgba(239, 68, 68, 0.12); color: var(--bk-error); }

.bk-status { text-align: center; margin-bottom: 22px; }
.bk-status-ico { font-size: 52px; margin-bottom: 12px; }
.bk-status-ok .bk-status-ico { color: var(--bk-success); }
.bk-status-cancel .bk-status-ico { color: var(--bk-muted); }
.bk-status p { color: var(--bk-soft); margin: 0; }

.bk-summary { border: 1px solid var(--bk-border); border-radius: 13px; padding: 18px 20px; background: var(--bk-elev); display: flex; flex-direction: column; gap: 13px; }
.bk-summary-row { display: flex; align-items: center; gap: 12px; }
.bk-summary-row i { width: 18px; text-align: center; color: var(--bk-brand); }

.bk-cancel-form { text-align: center; margin-top: 20px; }
.bk-cancel-btn { background: none; border: 1px solid var(--bk-border); color: var(--bk-soft); padding: 10px 20px; border-radius: 10px; cursor: pointer; font: inherit; font-weight: 600; }
.bk-cancel-btn:hover { border-color: var(--bk-error); color: var(--bk-error); }

/* ---- empty --------------------------------------------------------------- */
.bk-empty { text-align: center; padding: 18px 0; }
.bk-empty-ico { font-size: 46px; color: var(--bk-brand); margin-bottom: 14px; }
.bk-empty p { color: var(--bk-soft); }