/* Palette und Typografie sind an brainsonsilicon.com angelehnt. */
:root {
  --night-950: #072236;
  --night-900: #0e385d;
  --night-800: #0b2c48;
  --ink-50: #f8fafc;
  --ink-100: #e3ebf2;
  --ink-200: #becdda;
  --ink-300: #97aaba;
  --cyan-100: #ccedff;
  --cyan-200: #90d9fe;
  --cyan-300: #3bbbf7;
  --cyan-400: #0d9fde;
  --coral: #fbb141;
  --line: rgba(248, 250, 252, .13);
  --card: rgba(248, 250, 252, .045);
  --radius: 10px;
  color-scheme: dark;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background:
    radial-gradient(1100px 600px at 15% -10%, rgba(59, 187, 247, .16), transparent 60%),
    radial-gradient(900px 500px at 90% 0%, rgba(251, 177, 65, .09), transparent 55%),
    var(--night-950);
  color: var(--ink-100);
  font-family: "Barlow", -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 15px;
  line-height: 1.4;
  min-height: 100vh;
}

h1, h2, h3, .brand-text strong { font-family: "Funnel Display", "Barlow", sans-serif; }

button, select, input { font: inherit; }
a { color: var(--cyan-200); }

/* ── Kopfzeile ─────────────────────────────────────────────────────────────── */
.topbar {
  position: sticky; top: 0; z-index: 40;
  background: rgba(7, 34, 54, .93);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.topbar-inner {
  max-width: 1680px; margin: 0 auto; padding: .7rem 1.25rem;
  display: flex; flex-wrap: wrap; gap: 1rem; align-items: center; justify-content: space-between;
}
.brand { display: flex; align-items: center; gap: .8rem; min-width: 0; }
.brand-mark {
  font-family: "Funnel Display", sans-serif; font-weight: 700; font-size: 1.15rem;
  letter-spacing: -.5px; color: var(--night-950); background: var(--cyan-200);
  padding: .2rem .5rem; border-radius: 6px;
}
.brand-text { display: flex; flex-direction: column; min-width: 0; }
.brand-text strong { font-size: 1.1rem; letter-spacing: -.2px; color: var(--ink-50); }
.brand-text small { font-size: .78rem; color: var(--ink-300); }

.who { display: flex; align-items: center; gap: .55rem; flex-wrap: wrap; }
.who label { font-size: .82rem; color: var(--ink-300); text-transform: uppercase; letter-spacing: .06em; }
#participant {
  background: var(--night-900); color: var(--ink-50);
  border: 1px solid var(--line); border-radius: 8px; padding: .42rem .7rem; min-width: 12rem;
}
#participant:focus-visible, button:focus-visible, input:focus-visible, a:focus-visible {
  outline: 2px solid var(--cyan-300); outline-offset: 2px;
}

button.ghost, .btn.ghost {
  background: transparent; color: var(--cyan-200);
  border: 1px solid rgba(144, 217, 254, .45);
}
button.ghost:hover, .btn.ghost:hover { background: rgba(144, 217, 254, .12); }
.btn, button:not(.ghost):not(.card):not(.chip-remove) {
  background: var(--cyan-200); color: var(--night-950); border: 1px solid transparent;
  border-radius: 8px; padding: .42rem .85rem; font-weight: 600; cursor: pointer;
  text-decoration: none; display: inline-block; text-align: center;
}
.btn.ghost { padding: .42rem .85rem; border-radius: 8px; font-weight: 600; }

/* ── Steuerleiste ──────────────────────────────────────────────────────────── */
main { max-width: 1680px; margin: 0 auto; padding: 1.1rem 1.25rem 3rem; }
.controls {
  display: flex; flex-wrap: wrap; gap: .9rem 1.4rem; align-items: center; margin-bottom: 1rem;
}
.tabs { display: flex; gap: .3rem; background: rgba(248, 250, 252, .05); padding: .25rem; border-radius: 10px; }
.tabs button {
  background: transparent; color: var(--ink-200); border: 0; border-radius: 7px;
  padding: .45rem .95rem; cursor: pointer; font-weight: 600;
}
.tabs button[aria-selected="true"] { background: var(--cyan-200); color: var(--night-950); }
.tabs.secondary button[aria-selected="true"] { background: var(--night-900); color: var(--cyan-100); }
.toggle { display: inline-flex; align-items: center; gap: .45rem; font-size: .85rem; color: var(--ink-200); cursor: pointer; }
.toggle input { accent-color: var(--cyan-300); width: 1rem; height: 1rem; }

/* ── Raster ────────────────────────────────────────────────────────────────── */
.layout { display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: 1.4rem; align-items: start; }
.grid-wrap { min-width: 0; }
.grid { display: flex; flex-direction: column; gap: 4px; }

.head-row, .slot { display: grid; grid-template-columns: 58px minmax(0, 1fr); gap: 8px; }
.head-row { position: sticky; top: 58px; z-index: 20; padding: .35rem 0; background: var(--night-950); }
.head-cells { display: grid; grid-template-columns: repeat(var(--cols), minmax(0, 1fr)); gap: 8px; }
.head-cell {
  border-top: 3px solid var(--accent); border-radius: 3px;
  padding: .35rem .5rem .4rem; background: rgba(248, 250, 252, .04);
}
.head-cell strong { display: block; font-size: .9rem; color: var(--ink-50); }
.head-cell small { display: block; font-size: .72rem; color: var(--ink-300); }

.slot-time {
  font-variant-numeric: tabular-nums; font-weight: 600; font-size: .85rem;
  color: var(--ink-300); padding-top: .45rem; text-align: right;
}
.slot-body { display: flex; flex-direction: column; gap: 4px; min-width: 0; }
.cells { display: grid; grid-template-columns: repeat(var(--cols), minmax(0, 1fr)); gap: 8px; }
.cell { min-width: 0; display: flex; flex-direction: column; gap: 4px; }

/* ── Sessionkarte ──────────────────────────────────────────────────────────── */
.card {
  position: relative; width: 100%; text-align: left; cursor: pointer;
  background: var(--card); color: var(--ink-100);
  border: 1px solid var(--line); border-left: 3px solid var(--accent);
  border-radius: var(--radius); padding: .5rem .6rem .55rem; height: 100%;
  display: flex; flex-direction: column; gap: .25rem; transition: background .12s, border-color .12s;
}
.card:hover { background: rgba(248, 250, 252, .09); border-color: rgba(144, 217, 254, .5); }
.card.mine { background: rgba(144, 217, 254, .16); border-color: var(--cyan-200); }
.card.mine.conflict { border-color: var(--coral); background: rgba(251, 177, 65, .16); }
.card.dim { opacity: .3; }
.card-top { display: flex; align-items: center; gap: .4rem; flex-wrap: wrap; }
.card-time { font-size: .74rem; font-variant-numeric: tabular-nums; color: var(--ink-300); font-weight: 600; }
.badge {
  font-size: .64rem; text-transform: uppercase; letter-spacing: .05em; font-weight: 700;
  padding: .1rem .35rem; border-radius: 4px; background: rgba(248, 250, 252, .1); color: var(--ink-200);
}
.badge.own { background: var(--cyan-200); color: var(--night-950); }
.badge.mc { background: rgba(251, 177, 65, .22); color: var(--coral); }
.card-title { font-size: .87rem; font-weight: 600; line-height: 1.25; color: var(--ink-50); }
.card-speakers { font-size: .74rem; color: var(--ink-300); line-height: 1.25; }
.card-room { display: none; font-size: .72rem; color: var(--cyan-200); }
.card-foot { margin-top: auto; padding-top: .3rem; display: flex; align-items: center; gap: .25rem; flex-wrap: wrap; }
.chip {
  font-size: .64rem; font-weight: 700; letter-spacing: .02em;
  background: rgba(248, 250, 252, .14); color: var(--ink-100);
  border-radius: 999px; padding: .08rem .38rem;
}
.chip.self { background: var(--cyan-200); color: var(--night-950); }
.check {
  position: absolute; top: .45rem; right: .5rem; width: 1.05rem; height: 1.05rem;
  border-radius: 50%; border: 1px solid var(--line); display: grid; place-items: center;
  font-size: .7rem; color: transparent;
}
.card.mine .check { background: var(--cyan-200); border-color: var(--cyan-200); color: var(--night-950); }

/* Volle Breite: Plenum und Rahmenprogramm */
.band {
  border: 1px dashed var(--line); border-radius: var(--radius);
  padding: .35rem .7rem; font-size: .8rem; color: var(--ink-300);
  display: flex; gap: .6rem; align-items: baseline; flex-wrap: wrap;
}
.band strong { color: var(--ink-100); font-weight: 600; }
.band .where { color: var(--cyan-200); font-size: .74rem; }
.card.plenary { border-left-color: var(--cyan-200); }

.source { margin: 1.4rem 0 0; font-size: .75rem; color: var(--ink-300); }
.empty-note { padding: 2rem 1rem; text-align: center; color: var(--ink-300); }

/* ── Seitenpanel ──────────────────────────────────────────────────────────── */
.panel {
  position: sticky; top: 130px;
  max-height: calc(100vh - 150px); overflow: auto;
  background: rgba(14, 56, 93, .5); border: 1px solid var(--line); border-radius: 14px;
  padding: .9rem 1rem 1rem; display: flex; flex-direction: column; gap: .8rem;
}
.panel-head h2 { margin: 0; font-size: 1rem; color: var(--ink-50); }
.panel-sub { margin: .15rem 0 0; font-size: .78rem; color: var(--ink-300); }
.plan-day { margin-bottom: .7rem; }
.plan-day h3 {
  margin: 0 0 .35rem; font-size: .72rem; text-transform: uppercase; letter-spacing: .07em;
  color: var(--cyan-200); border-bottom: 1px solid var(--line); padding-bottom: .2rem;
}
.plan-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: .3rem; }
.plan-item { display: grid; grid-template-columns: 3.1rem minmax(0, 1fr); gap: .45rem; font-size: .78rem; }
.plan-item .t { font-variant-numeric: tabular-nums; color: var(--ink-300); }
.plan-item .n { color: var(--ink-100); }
.plan-item .r { display: block; color: var(--ink-300); font-size: .72rem; }
.plan-item.conflict .n { color: var(--coral); }
.plan-empty { font-size: .78rem; color: var(--ink-300); margin: 0; }
.panel-print { border-top: 1px solid var(--line); padding-top: .8rem; display: flex; flex-direction: column; gap: .5rem; }
.hint { margin: 0; font-size: .72rem; color: var(--ink-300); }
.warn { color: var(--coral); }

/* ── Dialog ───────────────────────────────────────────────────────────────── */
dialog {
  border: 1px solid var(--line); border-radius: 14px; background: var(--night-900);
  color: var(--ink-100); padding: 1.2rem 1.3rem 1.3rem; width: min(30rem, 92vw);
}
dialog::backdrop { background: rgba(3, 15, 25, .72); }
dialog h2 { margin: 0 0 .8rem; font-size: 1.1rem; }
.dialog-close { position: absolute; top: .5rem; right: .6rem; }
.dialog-close button { background: transparent; color: var(--ink-300); border: 0; font-size: 1.4rem; cursor: pointer; padding: 0 .3rem; }
.add-form { display: flex; gap: .5rem; }
.add-form input {
  flex: 1; background: var(--night-800); color: var(--ink-50);
  border: 1px solid var(--line); border-radius: 8px; padding: .45rem .7rem;
}
.dialog-error { color: var(--coral); font-size: .8rem; margin: .5rem 0 0; }
.participant-list { list-style: none; margin: .9rem 0 0; padding: 0; display: flex; flex-direction: column; gap: .3rem; max-height: 50vh; overflow: auto; }
.participant-list li {
  display: flex; align-items: center; gap: .5rem;
  padding: .4rem .5rem; border: 1px solid var(--line); border-radius: 8px;
}
.participant-list .pname { flex: 1; min-width: 0; }
.participant-list .pcount { font-size: .74rem; color: var(--ink-300); white-space: nowrap; }
.participant-list button {
  background: transparent; border: 1px solid var(--line); color: var(--ink-200);
  border-radius: 6px; padding: .15rem .45rem; font-size: .74rem; cursor: pointer; font-weight: 500;
}
.participant-list button.danger:hover { border-color: var(--coral); color: var(--coral); }

.toast {
  position: fixed; bottom: 1.2rem; left: 50%; transform: translateX(-50%);
  background: var(--cyan-200); color: var(--night-950); font-weight: 600;
  padding: .5rem 1rem; border-radius: 999px; z-index: 60; box-shadow: 0 6px 24px rgba(0, 0, 0, .35);
}

/* ── Schmale Viewports ────────────────────────────────────────────────────── */
@media (max-width: 1180px) {
  .layout { grid-template-columns: minmax(0, 1fr); }
  /* Ohne Spalte rutscht das Panel nach oben; ein voller Plan darf das Raster
     dann nicht wegdruecken, deshalb scrollt die Liste in sich. */
  .panel { position: static; order: -1; max-height: none; overflow: visible; }
  #panel-body { max-height: 38vh; overflow: auto; }
}
@media (max-width: 900px) {
  .head-row { display: none; }
  .slot { grid-template-columns: 46px minmax(0, 1fr); }
  .cells { grid-template-columns: minmax(0, 1fr); }
  .card-room { display: block; }
}