:root {
  --bg: #f5f6f8;
  --surface: #ffffff;
  --text: #16181d;
  --muted: #6b7280;
  --border: #e3e5ea;
  --accent: #2563eb;
  --accent-text: #ffffff;
  --danger: #dc2626;
  --ok: #15803d;
  --ok-bg: #dcfce7;
  --off-bg: #f1f2f4;
  --drop: #eef3ff;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1115;
    --surface: #181b21;
    --text: #e8eaee;
    --muted: #9aa1ad;
    --border: #2a2e37;
    --accent: #4f8cff;
    --danger: #f87171;
    --ok: #4ade80;
    --ok-bg: #12301c;
    --off-bg: #23262d;
    --drop: #18223a;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

[hidden] { display: none !important; }
.uploads:empty, .message:empty { display: none; }

h1 { font-size: 18px; margin: 0; }
h2 { font-size: 15px; margin: 0; }
.muted { color: var(--muted); }
.error { color: var(--danger); min-height: 1.4em; margin: 0; }

button, .button-like {
  font: inherit;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  padding: 8px 14px;
  cursor: pointer;
}
.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-text); }
.ghost { background: transparent; }
.danger { color: var(--danger); }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
}

.login { min-height: 100vh; display: grid; place-items: center; padding: 16px; }
.login-card { width: min(360px, 100%); display: grid; gap: 10px; }
.login-card input {
  font: inherit;
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
}

.topbar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}
.topbar #logout { margin-left: auto; }

.pill { font-size: 13px; padding: 3px 10px; border-radius: 999px; background: var(--off-bg); color: var(--muted); }
.pill-ok { background: var(--ok-bg); color: var(--ok); }

.content { max-width: 820px; margin: 0 auto; padding: 16px; display: grid; gap: 16px; }

.drop-zone {
  border: 2px dashed var(--border);
  border-radius: 12px;
  padding: 28px 16px;
  text-align: center;
  background: var(--surface);
}
.drop-zone.over { border-color: var(--accent); background: var(--drop); }
.drop-title { font-weight: 600; margin: 0 0 4px; }
.drop-zone .button-like { display: inline-block; margin-top: 12px; }

.uploads { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.uploads li { display: grid; gap: 4px; font-size: 14px; }
.uploads progress { width: 100%; height: 6px; }
.message { margin: 0; min-height: 1.2em; color: var(--danger); }

.list-header { display: flex; justify-content: space-between; align-items: baseline; margin-bottom: 8px; }
.file-list { list-style: none; margin: 0; padding: 0; }
.file-list li {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 0;
  border-top: 1px solid var(--border);
}
.file-list li:first-child { border-top: none; }
.file-info { flex: 1; min-width: 0; }
.file-name { overflow-wrap: anywhere; }
.file-meta { font-size: 13px; color: var(--muted); }
.file-actions { display: flex; gap: 8px; flex-shrink: 0; }
.file-actions a { color: var(--accent); text-decoration: none; padding: 8px 4px; }
.confirm { font-size: 14px; display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.empty { margin: 8px 0; }

@media (max-width: 520px) {
  .file-list li { flex-wrap: wrap; }
  .file-actions { width: 100%; justify-content: flex-end; }
}