:root {
  --bg: #0f1221;
  --panel: #151836;
  --text: #eaeef8;
  --muted: #b7bfd9;
  --accent: #4f8cff;
  --ok: #31c48d;
  --warn: #ffb020;
  --danger: #ef4e4e;
  --chip: #232853;
  --border: #2a2f5b;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, "Fira Sans", "Droid Sans", "Helvetica Neue", Arial, sans-serif;
  background: linear-gradient(180deg, var(--bg), #0d1020 60%, #0b0e1c 100%);
  color: var(--text);
}

.app-header {
  padding: 24px;
  border-bottom: 1px solid var(--border);
  background: radial-gradient(1200px 1200px at 0% 0%, rgba(79,140,255,0.12), transparent 60%), var(--bg);
}
.app-header h1 { margin: 0 0 8px 0; font-weight: 700; }
.subtitle { margin: 0; color: var(--muted); }

.app-container { max-width: 1100px; margin: 0 auto; padding: 24px; }

.controls { display: grid; grid-template-columns: 1fr 220px; gap: 16px; margin-bottom: 20px; }
.control-group { display: flex; flex-direction: column; gap: 6px; }
label { color: var(--muted); font-size: 14px; }
input[type="search"], select {
  background: var(--chip);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 10px 12px;
  border-radius: 8px;
}

.sessions-list { display: grid; grid-template-columns: 1fr; gap: 16px; }

.session-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
}
.session-header {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 8px;
}
.session-title { margin: 0; font-size: 18px; }
.session-meta { color: var(--muted); font-size: 13px; text-align: right; }

.session-body { padding: 14px 16px; display: grid; gap: 10px; }
.description { color: var(--text); opacity: 0.92; line-height: 1.45; }

.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  background: var(--chip);
  color: var(--muted);
  border: 1px solid var(--border);
  padding: 4px 8px;
  border-radius: 999px;
  font-size: 12px;
}
.chip.accent { color: var(--text); border-color: #4f8cff80; background: #4f8cff22; }

.speakers {
  border-top: 1px dashed var(--border);
  padding-top: 12px;
}
.speakers h4 { margin: 0 0 10px 0; }
.speaker-list { display: grid; grid-template-columns: 1fr; gap: 10px; }
.speaker {
  background: #101336;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px;
}
.speaker header { display: flex; justify-content: space-between; align-items: baseline; }
.speaker h5 { margin: 0; font-size: 16px; }
.role { font-size: 12px; color: var(--muted); }
.org { color: var(--muted); font-size: 13px; }

.perms { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 8px; }
.perm { font-size: 12px; border-radius: 6px; padding: 2px 6px; border: 1px solid var(--border); }
.perm.ok { color: var(--ok); border-color: #31c48d55; background: #31c48d15; }
.perm.no { color: var(--danger); border-color: #ef4e4e55; background: #ef4e4e10; }

.app-footer { border-top: 1px solid var(--border); color: var(--muted); padding: 16px; text-align: center; }

@media (min-width: 820px) {
  .speaker-list { grid-template-columns: 1fr 1fr; }
}