:root { font-family: Inter, system-ui, sans-serif; }
body { margin: 0; background: #f5f7fa; color: #1d2430; }
header { background: #111827; color: #fff; padding: 1rem; display: flex; justify-content: space-between; align-items: center; gap: 1rem; }
header nav { display: flex; align-items: center; gap: .8rem; }
header a { color: #93c5fd; text-decoration: none; }
.brand-link { color: #fff; text-decoration: none; }
header button { width: auto; }
main { max-width: none; margin: 1rem; padding: 0 .5rem; }
form { background: #fff; padding: 1rem; border-radius: .5rem; box-shadow: 0 1px 3px #0001; margin-bottom: 1rem; }
label { display: block; margin-bottom: .7rem; }
input, textarea, button { width: 100%; padding: .6rem; margin-top: .3rem; }
button { cursor: pointer; background: #2563eb; border: none; color: #fff; border-radius: .3rem; }
.actions button { width: 100%; font-size: .8rem; padding: .45rem; }
.flash { padding: .7rem; border-radius: .4rem; }
.flash-success { background: #dcfce7; }
.flash-error { background: #fee2e2; }
.hint { color: #4b5563; margin-top: 0; }

.calendar-shell { display: grid; grid-template-columns: 70px 1fr; gap: .5rem; overflow: auto; max-height: 76vh; border: 1px solid #dbe3ef; border-radius: .6rem; background: #fff; }
.calendar-times { position: sticky; left: 0; z-index: 4; background: #fff; border-right: 1px solid #dbe3ef; }
.time-label { height: 56px; font-size: .75rem; color: #64748b; text-align: right; padding: .2rem .4rem 0 0; border-top: 1px solid #edf2f7; }
.time-label:first-child { border-top: none; }

.calendar-days { display: grid; grid-auto-flow: column; grid-auto-columns: minmax(180px, 1fr); overflow-x: auto; }
.calendar-day-column { border-right: 1px solid #e5e7eb; min-width: 180px; }
.calendar-day-column:last-child { border-right: none; }
.calendar-day-column h3 { margin: 0; padding: .4rem .5rem; font-size: .9rem; text-transform: capitalize; position: sticky; top: 0; z-index: 3; background: #f8fafc; border-bottom: 1px solid #e5e7eb; }
.calendar-day-grid { position: relative; height: 1344px; }
.calendar-hour-lines { position: absolute; inset: 0; background: repeating-linear-gradient(to bottom, transparent 0 55px, #edf2f7 55px 56px); }
.calendar-day-events { position: absolute; inset: 0; }

.calendar-event { position: absolute; display: block; box-sizing: border-box; text-decoration: none; color: inherit; background: #e8f0fe; border-left: 3px solid #3b82f6; border-radius: .35rem; padding: .25rem .3rem; overflow: hidden; z-index: 2; }
.calendar-event:hover { background: #dbeafe; }
.calendar-event h4 { margin: 0; font-size: .78rem; line-height: 1.2; }
.calendar-event p { margin: .1rem 0 .2rem; font-size: .7rem; color: #475569; }

.participants-row { display: flex; align-items: center; flex-wrap: wrap; gap: .25rem; margin-bottom: .2rem; }
.avatar { width: 20px; height: 20px; border-radius: 50%; color: #fff; display: inline-flex; align-items: center; justify-content: center; font-size: .6rem; font-weight: 700; }

.actions { display: grid; gap: .3rem; }
.event-detail-card { background: #fff; padding: 1rem; border-radius: .6rem; box-shadow: 0 1px 3px #0001; max-width: 680px; }