:root {
  --bg: #f4f5f7;
  --card: #ffffff;
  --text: #1d1f24;
  --muted: #646a75;
  --line: #dde0e5;
  --accent: #5865f2;
  --accent-text: #ffffff;
  --ok: #1a7f4b;
  --err: #c0392b;
  --bar: #e7e9ee;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #15171b;
    --card: #1f2227;
    --text: #e8eaed;
    --muted: #9aa0aa;
    --line: #33373e;
    --ok: #4cc38a;
    --err: #ff7b6b;
    --bar: #2b2f36;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", "Hiragino Sans", "Noto Sans JP", sans-serif;
  line-height: 1.6;
  padding: 32px 16px;
}
.card {
  max-width: 720px;
  margin: 0 auto;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 28px;
}
.card.narrow { max-width: 440px; text-align: center; }
h1 { font-size: 1.4rem; margin: 0 0 12px; }
p { margin: 0 0 16px; color: var(--muted); }
.button {
  display: inline-block;
  border: 0;
  border-radius: 8px;
  padding: 10px 20px;
  font: inherit;
  font-weight: 600;
  background: var(--accent);
  color: var(--accent-text);
  text-decoration: none;
  cursor: pointer;
}
.button.secondary { background: transparent; color: var(--muted); border: 1px solid var(--line); }
.id { font-family: ui-monospace, Consolas, monospace; font-size: 1.1rem; color: var(--text); user-select: all; }
header { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin-bottom: 20px; flex-wrap: wrap; }
header h1 { margin: 0; }
header .who { color: var(--muted); font-size: 0.9rem; display: flex; align-items: center; gap: 10px; }
header form { margin: 0; }
header .button { padding: 6px 12px; font-size: 0.85rem; }
.drop {
  display: block;
  border: 2px dashed var(--line);
  border-radius: 12px;
  padding: 40px 16px;
  text-align: center;
  cursor: pointer;
  transition: border-color .15s, background .15s;
}
.drop.over { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 8%, transparent); }
.drop p { margin: 0 0 6px; }
.drop strong { color: var(--text); }
ul.queue { list-style: none; padding: 0; margin: 20px 0 0; }
ul.queue li { padding: 10px 0; border-top: 1px solid var(--line); }
.row { display: flex; justify-content: space-between; gap: 12px; font-size: 0.92rem; }
.row .name { overflow-wrap: anywhere; }
.row .state { color: var(--muted); white-space: nowrap; }
.row .state.ok { color: var(--ok); }
.row .state.err { color: var(--err); }
.card.wide { max-width: 1000px; }
section { margin-top: 32px; }
h2 { font-size: 1.1rem; margin: 0 0 12px; }
.section-head { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; margin-bottom: 8px; }
.section-head h2 { margin: 0; }
.tools { display: flex; gap: 8px; align-items: center; }
.button.small { padding: 5px 12px; font-size: 0.85rem; }
.button.danger { background: transparent; color: var(--err); border: 1px solid var(--err); }
input {
  font: inherit;
  padding: 6px 10px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--bg);
  color: var(--text);
  min-width: 0;
}
form.add { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 12px; }
form.add input { flex: 1 1 180px; }
.scroll { overflow-x: auto; }
table.files { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
table.files th { text-align: left; font-weight: 600; color: var(--muted); padding: 6px 8px; border-bottom: 1px solid var(--line); white-space: nowrap; }
table.files td { padding: 8px; border-bottom: 1px solid var(--line); vertical-align: middle; }
table.files td:last-child { text-align: right; white-space: nowrap; }
.num { text-align: right; white-space: nowrap; }
.mono { font-family: ui-monospace, Consolas, monospace; font-size: 0.85rem; }
a.fname { color: var(--accent); overflow-wrap: anywhere; }
.tag { font-size: 0.75rem; padding: 1px 6px; border-radius: 4px; background: var(--accent); color: var(--accent-text); white-space: nowrap; }
.tag.deputy { background: #b7791f; }
.tag.user, .tag.muted { background: var(--bar); color: var(--muted); }
.tag.in { background: #2f855a; }
.tag.out { background: #3182ce; }
h3 { font-size: 0.95rem; margin: 20px 0 6px; }
.panel { border: 1px solid var(--accent); border-radius: 12px; padding: 20px; margin-top: 8px; }
.actions { display: flex; gap: 6px; justify-content: flex-end; flex-wrap: wrap; }
.note { font-size: 0.85rem; margin-top: 10px; }
td.empty { color: var(--muted); text-align: left !important; }
.tag.act-login_denied, .tag.act-download_denied, .tag.act-delete, .tag.act-purge, .tag.act-remove { background: var(--err); }
.actions.left { justify-content: flex-start; margin-top: 10px; }
.tag.act-login, .tag.act-download { background: var(--bar); color: var(--text); }
label.check { display: flex; align-items: center; gap: 6px; margin-top: 10px; font-size: 0.9rem; cursor: pointer; }
label.check input { width: auto; }
.usage { margin-top: 10px; }
.usage p { margin: 4px 0 0; font-size: 0.85rem; }
form.settings { display: grid; gap: 14px; max-width: 520px; }
form.settings label { display: grid; gap: 4px; font-weight: 600; }
form.settings small { font-weight: 400; color: var(--muted); }
form.settings .inline { display: flex; align-items: center; gap: 6px; font-weight: 400; }
form.settings input { width: 120px; }
form.settings .button { justify-self: start; }
.empty { margin-top: 12px; }
.msg { padding: 8px 12px; border-radius: 8px; border: 1px solid var(--line); }
.msg.ok { color: var(--ok); }
.msg.err { color: var(--err); }
.bar { height: 6px; border-radius: 3px; background: var(--bar); margin-top: 6px; overflow: hidden; }
.guide h2 { margin-top: 32px; }
.guide p, .guide li, .guide td { color: var(--text); }
.guide ol { padding-left: 1.4em; margin: 0 0 16px; }
.guide li { margin-bottom: 6px; }
.guide table.files td:last-child { text-align: left; white-space: normal; }
.guide table.files td:first-child { font-weight: 600; white-space: nowrap; }
.guide dt { font-weight: 600; margin-top: 16px; }
.guide dd { margin: 4px 0 0; }
.guide .date { color: var(--muted); font-size: 0.85rem; }
.guide .start { text-align: center; margin-top: 32px; }
.bar span { display: block; height: 100%; width: 0; background: var(--accent); transition: width .2s; }
.providers { display: grid; gap: 10px; margin: 20px 0; }
.providers .button { display: block; width: 100%; text-align: center; }
.button.provider.discord { background: #5865f2; color: #fff; }
.button.provider.google { background: #fff; color: #1f1f1f; border: 1px solid #747775; }
.button.provider.microsoft { background: #2f2f2f; color: #fff; }
.button.provider.line { background: #06c755; color: #fff; }
.button.provider.x { background: #000; color: #fff; border: 1px solid #444; }
.button.provider.bluesky { background: #1185fe; color: #fff; }
form.bsky { display: grid; gap: 6px; padding: 10px; border: 1px solid var(--line); border-radius: 8px; }
form.bsky input { width: 100%; }
.button:disabled { opacity: .6; cursor: wait; }
.invite-box { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; margin-top: 10px; }
.invite-box input { flex: 1 1 320px; font-family: ui-monospace, Consolas, monospace; font-size: 0.85rem; }
.ids { display: flex; gap: 4px; flex-wrap: wrap; align-items: center; }
.tag.act-login_unknown, .tag.act-unlink { background: var(--err); }
.fname-wrap { display: inline-flex; align-items: center; gap: 6px; flex-wrap: wrap; }
.button.view-btn { padding: 1px 8px; font-size: 0.75rem; font-weight: 500; }
dialog.viewer { width: min(96vw, 1200px); max-height: 94vh; padding: 0; border: 1px solid var(--line); border-radius: 12px; background: var(--card); color: var(--text); }
dialog.viewer::backdrop { background: rgba(0, 0, 0, .8); }
.viewer-head { display: flex; justify-content: space-between; align-items: center; gap: 10px; padding: 10px 14px; border-bottom: 1px solid var(--line); flex-wrap: wrap; }
.viewer-name { font-weight: 600; overflow-wrap: anywhere; }
.viewer-tools { display: flex; gap: 6px; }
.viewer-body { display: flex; justify-content: center; align-items: center; background: #000; min-height: 120px; }
.viewer-body img, .viewer-body video { display: block; max-width: 100%; max-height: calc(94vh - 110px); object-fit: contain; }
.viewer-body audio { width: min(600px, 92%); margin: 40px 0; }
.viewer-note { margin: 0; padding: 8px 14px; font-size: 0.85rem; }
.viewer-note:empty { display: none; }
.tag.act-view { background: var(--bar); color: var(--text); }

/* 相手の確認（見た・ダウンロードした） */
.receipt { display: flex; flex-direction: column; align-items: flex-start; gap: 2px; }

/* ダウンロード画面 */
.file-name { font-weight: bold; font-size: 1.1rem; word-break: break-all; margin-bottom: 4px; }