:root {
  --bg: #f6f7f9;
  --card: #ffffff;
  --text: #1a1d21;
  --muted: #6b7280;
  --border: #e2e5ea;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --danger: #dc2626;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.07);
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #101216;
    --card: #191c22;
    --text: #e7e9ec;
    --muted: #8b93a1;
    --border: #2a2f38;
    --accent: #3b82f6;
    --accent-hover: #60a5fa;
    --danger: #f87171;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.4);
  }
}

* { box-sizing: border-box; margin: 0; }

body {
  font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
  background: var(--card);
}
.brand { color: var(--text); text-decoration: none; font-size: 17px; }
.brand b { font-weight: 700; }
nav { display: flex; align-items: center; gap: 16px; }
nav a { color: var(--muted); text-decoration: none; }
nav a:hover { color: var(--text); }
.who { color: var(--muted); font-size: 14px; }

main { width: 100%; max-width: 680px; margin: 32px auto; padding: 0 16px; flex: 1; }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  margin-bottom: 20px;
  box-shadow: var(--shadow);
}
.card.narrow { max-width: 420px; margin: 48px auto 20px; }
.card.center { text-align: center; }

h1 { font-size: 22px; margin-bottom: 8px; }
h2 { font-size: 16px; margin-bottom: 14px; }
.muted { color: var(--muted); font-size: 14px; }
.error { color: var(--danger); font-size: 14px; margin: 10px 0; }
.break { overflow-wrap: anywhere; }
.bigicon { font-size: 44px; }
.mt { margin-top: 12px; }

label { display: block; font-size: 14px; margin: 14px 0 4px; }
input[type="email"], input[type="text"], .code-input {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
  font-size: 16px;
}
.code-input { letter-spacing: 8px; font-size: 22px; text-align: center; }
input:focus { outline: 2px solid var(--accent); outline-offset: -1px; }

button, .button {
  display: inline-block;
  margin-top: 14px;
  padding: 10px 18px;
  border: 0;
  border-radius: 8px;
  background: var(--accent);
  color: #fff;
  font-size: 15px;
  cursor: pointer;
  text-decoration: none;
}
button:hover, .button:hover { background: var(--accent-hover); }
button.linkish {
  background: none;
  color: var(--muted);
  padding: 0;
  margin: 0;
  font-size: 14px;
  text-decoration: underline;
}
button.linkish:hover { color: var(--text); }
button.danger { background: none; color: var(--danger); border: 1px solid var(--border); padding: 5px 10px; font-size: 13px; margin: 0; }
button.danger:hover { background: var(--danger); color: #fff; }
button.copy { background: none; color: var(--accent); border: 1px solid var(--border); padding: 5px 10px; font-size: 13px; margin: 0; }
button.copy:hover { border-color: var(--accent); }

#dropzone {
  border: 2px dashed var(--border);
  border-radius: 10px;
  padding: 36px 20px;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}
#dropzone.drag { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 7%, transparent); }
#dropzone p { pointer-events: none; }

ul.files, ul.users, #upload-progress { list-style: none; padding: 0; }
.file-row, ul.users li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 4px;
  border-bottom: 1px solid var(--border);
}
.file-row:last-child, ul.users li:last-child { border-bottom: 0; }
.file-main { min-width: 0; }
.file-name { color: var(--text); text-decoration: none; font-weight: 550; overflow-wrap: anywhere; }
.file-name:hover { color: var(--accent); }
.file-meta { display: block; color: var(--muted); font-size: 13px; }
.file-actions { display: flex; gap: 8px; align-items: center; flex-shrink: 0; }
.empty { padding: 12px 4px; }

#upload-progress li { padding: 10px 4px; font-size: 14px; }
.progress-bar { height: 6px; background: var(--border); border-radius: 3px; margin-top: 6px; overflow: hidden; }
.progress-bar > div { height: 100%; width: 0; background: var(--accent); transition: width 0.15s; }
#upload-progress .fail { color: var(--danger); }

.add-user { display: flex; gap: 10px; align-items: center; margin-top: 14px; flex-wrap: wrap; }
.add-user input[type="email"] { flex: 1; min-width: 200px; }
.add-user button { margin: 0; }
.check { display: flex; gap: 6px; align-items: center; margin: 0; font-size: 14px; color: var(--muted); }
.badge {
  background: color-mix(in srgb, var(--accent) 15%, transparent);
  color: var(--accent);
  font-size: 12px;
  padding: 2px 8px;
  border-radius: 99px;
}

footer { text-align: center; color: var(--muted); font-size: 13px; padding: 20px; }

@media (max-width: 520px) {
  .file-row { flex-direction: column; align-items: flex-start; }
}