:root {
  --paper: #F2F5F4;
  --paper-raised: #FFFFFF;
  --ink: #1B2430;
  --ink-soft: #5B6673;
  --line: #DDE3E1;
  --accent: #0F8B8D;
  --accent-ink: #063C3D;
  --accent-soft: #E3F3F2;
  --danger: #C1502E;
  --danger-soft: #FBEAE4;
  --radius: 10px;
  --shadow: 0 1px 2px rgba(27, 36, 48, .06), 0 6px 16px rgba(27, 36, 48, .06);
  --mono: ui-monospace, "SF Mono", "Cascadia Code", "JetBrains Mono", Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }
html, body { height: 100%; }

/* WICHTIG: Ohne diese Regel gewinnen spaeter definierte "display: flex"-
   Regeln (z. B. .modal, .field) gegen das hidden-Attribut, weil
   Autoren-Styles bei gleicher Spezifitaet immer vor den
   Browser-Standardstilen stehen. Damit [hidden] zuverlaessig
   funktioniert (Passwort-Modal, ein-/ausblendbare Felder, ...), muss
   diese Regel ganz oben stehen und !important verwenden. */
[hidden] { display: none !important; }

body {
  margin: 0;
  font-family: var(--sans);
  background: var(--paper);
  color: var(--ink);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}
h1, h2 { line-height: 1.25; }
a { color: var(--accent-ink); }

.brand { display: flex; align-items: center; gap: .5rem; text-decoration: none; color: var(--ink); }
.brand__mark {
  width: 22px; height: 22px; border-radius: 6px; flex: none;
  background: linear-gradient(135deg, var(--accent), var(--accent-ink));
}
.brand__name { font-weight: 700; letter-spacing: -.01em; }
.brand--small .brand__name { font-size: .95rem; }

/* ---------------- Home page ---------------- */
.home { max-width: 480px; margin: 0 auto; padding: 3rem 1.25rem 4rem; }
.home__header { text-align: center; margin-bottom: 2rem; }
.home__header .brand { justify-content: center; }
.home__lead { color: var(--ink-soft); margin-top: .75rem; }
.home__foot { text-align: center; color: var(--ink-soft); font-size: .8rem; margin-top: 2rem; }

.panel {
  background: var(--paper-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.5rem;
}
.panel h2 { margin: 0 0 1rem; font-size: 1.05rem; }

.divider { display: flex; align-items: center; gap: .75rem; margin: 1.25rem 0; color: var(--ink-soft); font-size: .8rem; }
.divider::before, .divider::after { content: ""; flex: 1; height: 1px; background: var(--line); }

.stack { display: flex; flex-direction: column; gap: .9rem; margin: 0; }
.field { display: flex; flex-direction: column; gap: .35rem; }
.field label { font-size: .85rem; color: var(--ink-soft); }
.checkbox { display: flex; align-items: center; gap: .5rem; font-size: .9rem; color: var(--ink-soft); }

input[type=text], input[type=password], textarea {
  font: inherit;
  padding: .65rem .75rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
  color: var(--ink);
  width: 100%;
}
input:focus, textarea:focus, button:focus-visible, .drop-zone:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}
#join-code { font-family: var(--mono); letter-spacing: .15em; text-transform: uppercase; }

.btn {
  font: inherit;
  border: 1px solid transparent;
  border-radius: 8px;
  padding: .65rem 1.1rem;
  cursor: pointer;
  font-weight: 600;
  white-space: nowrap;
}
.btn--primary { background: var(--accent); color: #fff; }
.btn--primary:hover { background: var(--accent-ink); }
.btn--secondary { background: var(--accent-soft); color: var(--accent-ink); }
.btn--secondary:hover { background: #d5ece9; }
.btn--ghost { background: transparent; border-color: var(--line); color: var(--ink-soft); }
.btn--ghost:hover { background: var(--paper-raised); }
.btn--danger { color: var(--danger); }
.btn--danger:hover { background: var(--danger-soft); }
.btn:disabled { opacity: .6; cursor: default; }

.error { color: var(--danger); font-size: .85rem; min-height: 1em; margin: 0; }

/* ---------------- Room page ---------------- */
.room { max-width: 720px; margin: 0 auto; padding: 1.25rem 1.25rem 2rem; }
.room__header {
  display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: .75rem;
  padding: .75rem 0 1rem;
}
.room__code-wrap { display: flex; align-items: center; gap: .55rem; }
.status-dot { width: 9px; height: 9px; border-radius: 50%; background: var(--line); flex: none; }
.status-dot.is-live { background: var(--accent); animation: mcb-pulse 2s ease-in-out infinite; }
@keyframes mcb-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(15, 139, 141, .5); }
  50%      { box-shadow: 0 0 0 5px rgba(15, 139, 141, 0); }
}
.room__code {
  font-family: var(--mono); font-size: 1.1rem; letter-spacing: .18em;
  background: var(--accent-soft); color: var(--accent-ink);
  padding: .3rem .65rem; border-radius: 6px;
}
.room__actions { display: flex; gap: .5rem; }
.room__hint { color: var(--ink-soft); font-size: .8rem; margin: 0 0 1rem; }

.item-list { list-style: none; margin: 0 0 1.25rem; padding: 0; display: flex; flex-direction: column; gap: .6rem; }
.item {
  background: var(--paper-raised); border: 1px solid var(--line); border-radius: var(--radius);
  padding: .85rem 1rem; box-shadow: var(--shadow);
}
.item__meta { display: flex; justify-content: space-between; align-items: center; margin-bottom: .4rem; gap: .5rem; }
.item__time { font-size: .75rem; color: var(--ink-soft); }
.item__delete {
  background: none; border: none; color: var(--ink-soft); cursor: pointer; font-size: .85rem; line-height: 1;
  padding: .2rem .4rem; border-radius: 4px;
}
.item__delete:hover { background: var(--danger-soft); color: var(--danger); }
.item__text {
  white-space: pre-wrap; word-break: break-word; font-family: var(--mono); font-size: .88rem;
  margin: 0 0 .55rem; max-height: 280px; overflow: auto;
}
.item__copy {
  border: 1px solid var(--line); background: var(--paper); border-radius: 6px;
  padding: .3rem .7rem; font-size: .8rem; cursor: pointer; color: var(--ink);
}
.item__copy:hover { border-color: var(--accent); color: var(--accent-ink); }
.item__file { display: flex; align-items: baseline; gap: .55rem; margin-bottom: .55rem; flex-wrap: wrap; }
.item__filename { font-weight: 600; word-break: break-all; }
.item__filesize { color: var(--ink-soft); font-size: .8rem; }
.item__download {
  display: inline-block; border: 1px solid var(--line); border-radius: 6px;
  padding: .3rem .7rem; font-size: .8rem; text-decoration: none; color: var(--ink);
}
.item__download:hover { border-color: var(--accent); color: var(--accent-ink); }

.empty-state { text-align: center; color: var(--ink-soft); padding: 2.5rem 0; }

.composer {
  position: sticky; bottom: .75rem;
  background: var(--paper-raised); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1rem; box-shadow: var(--shadow);
}
.composer textarea { min-height: 70px; resize: vertical; font-family: var(--mono); font-size: .88rem; }
.composer__row { display: flex; align-items: center; gap: .75rem; margin-top: .65rem; flex-wrap: wrap; }
.drop-zone {
  flex: 1; min-width: 200px; border: 1px dashed var(--line); border-radius: 8px;
  padding: .6rem .8rem; font-size: .8rem; color: var(--ink-soft); cursor: pointer; text-align: center;
}
.drop-zone.is-dragover { border-color: var(--accent); color: var(--accent-ink); background: var(--accent-soft); }
#upload-progress { width: 100%; margin-top: .5rem; accent-color: var(--accent); }

.modal {
  position: fixed; inset: 0; background: rgba(27, 36, 48, .45);
  display: flex; align-items: center; justify-content: center; padding: 1rem; z-index: 10;
}
.modal__card {
  background: var(--paper-raised); border-radius: var(--radius); padding: 1.5rem;
  width: 100%; max-width: 360px; box-shadow: var(--shadow);
}
.modal__card h2 { margin-top: 0; font-size: 1.05rem; }

.state-message { max-width: 480px; margin: 4rem auto; text-align: center; padding: 0 1.25rem; }
.state-message h1 { font-size: 1.3rem; }

@media (max-width: 520px) {
  .room__header { flex-direction: column; align-items: flex-start; }
  .room__actions { width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  .status-dot.is-live { animation: none; }
}