:root {
  --bg: #fff7f2;
  --card: #ffffff;
  --accent: #ff7a59;
  --accent-d: #f2643f;
  --accent-soft: #ffe9e0;
  --text: #3a2c27;
  --muted: #9b8a82;
  --line: #f0e3db;
  --shadow: 0 10px 30px rgba(255, 122, 89, 0.12);
  --radius: 18px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  color: var(--text);
  background: var(--bg);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* 柔和暖色光晕背景 */
.aurora {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(60% 50% at 15% 0%, #ffe3d6 0%, transparent 60%),
    radial-gradient(50% 50% at 100% 10%, #ffeede 0%, transparent 55%),
    radial-gradient(40% 40% at 80% 100%, #ffe9f0 0%, transparent 60%);
}

.topbar {
  max-width: 720px;
  margin: 0 auto;
  padding: 24px 20px 8px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand { display: flex; align-items: center; gap: 12px; }
.logo { font-size: 34px; filter: drop-shadow(0 4px 8px rgba(255,122,89,.25)); }
.brand-text h1 { margin: 0; font-size: 20px; letter-spacing: .5px; }
.brand-text p { margin: 2px 0 0; font-size: 12px; color: var(--muted); }

.ghost-btn {
  border: 1px solid var(--line);
  background: #fff;
  color: var(--text);
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 13px;
  cursor: pointer;
  transition: .2s;
}
.ghost-btn:hover { border-color: var(--accent); color: var(--accent-d); }

.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 12px 20px 40px;
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 22px;
  margin-bottom: 16px;
}

/* Tabs */
.tabs { display: flex; gap: 8px; }
.tab {
  flex: 1;
  border: none;
  background: transparent;
  padding: 12px;
  border-radius: 12px;
  font-size: 15px;
  font-weight: 600;
  color: var(--muted);
  cursor: pointer;
  transition: .2s;
}
.tab.active { background: var(--accent-soft); color: var(--accent-d); }

/* Segmented control */
.seg {
  display: inline-flex;
  background: #fbeee7;
  border-radius: 12px;
  padding: 4px;
  margin-bottom: 16px;
}
.seg-btn {
  border: none;
  background: transparent;
  padding: 8px 22px;
  border-radius: 9px;
  font-size: 14px;
  font-weight: 600;
  color: var(--muted);
  cursor: pointer;
  transition: .2s;
}
.seg-btn.active { background: #fff; color: var(--accent-d); box-shadow: 0 2px 8px rgba(255,122,89,.15); }

.hidden { display: none !important; }

textarea, input[type="text"], input[type="password"], select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 12px 14px;
  font-size: 14px;
  color: var(--text);
  background: #fffdfc;
  font-family: inherit;
  outline: none;
  transition: .2s;
}
textarea { resize: vertical; }
textarea:focus, input:focus, select:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }

/* Dropzone */
.dropzone {
  display: block;
  border: 2px dashed var(--line);
  border-radius: 14px;
  padding: 28px;
  text-align: center;
  cursor: pointer;
  transition: .2s;
  background: #fffdfc;
}
.dropzone.drag { border-color: var(--accent); background: var(--accent-soft); }
.dz-icon { font-size: 30px; }
.dz-inner p { margin: 6px 0 0; font-size: 14px; color: var(--text); }
.dz-hint { color: var(--muted) !important; font-size: 12px !important; }
.link { color: var(--accent-d); font-weight: 600; }

.file-chip {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--accent-soft);
  border-radius: 12px;
  padding: 10px 14px;
  margin-top: 12px;
}
.fc-name { font-weight: 600; flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.fc-size { color: var(--muted); font-size: 13px; }
.fc-x { border: none; background: transparent; cursor: pointer; color: var(--muted); font-size: 15px; }

/* Options */
.options { display: flex; flex-wrap: wrap; gap: 12px; margin: 18px 0; }
.opt { display: flex; flex-direction: column; gap: 6px; font-size: 13px; color: var(--muted); }
.opt.grow { flex: 1; min-width: 180px; }
.opt select, .opt input { min-width: 140px; }

.primary-btn {
  width: 100%;
  border: none;
  background: linear-gradient(135deg, var(--accent), var(--accent-d));
  color: #fff;
  padding: 14px;
  border-radius: 14px;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  transition: .2s;
  box-shadow: 0 8px 20px rgba(255,122,89,.3);
}
.primary-btn:hover { transform: translateY(-1px); }
.primary-btn:active { transform: translateY(0); }
.primary-btn:disabled { opacity: .6; cursor: default; transform: none; }

/* Upload progress */
.dropzone[aria-disabled="true"] { opacity: .6; cursor: default; }
.upload-progress { margin-top: 18px; padding: 14px; border-radius: 12px; background: var(--accent-soft); }
.upload-progress-head { display: flex; align-items: baseline; gap: 12px; font-size: 13px; font-weight: 600; }
#uploadProgressStatus { flex: 1; min-width: 0; overflow-wrap: anywhere; }
#uploadProgressPercent { color: var(--accent-d); font-variant-numeric: tabular-nums; }
.upload-progress progress { display: block; appearance: none; width: 100%; height: 8px; margin: 10px 0; border: 0; border-radius: 999px; overflow: hidden; background: var(--line); accent-color: var(--accent); }
.upload-progress progress::-webkit-progress-bar { background: var(--line); border-radius: 999px; }
.upload-progress progress::-webkit-progress-value { background: var(--accent); border-radius: 999px; transition: width .15s ease; }
.upload-progress progress::-moz-progress-bar { background: var(--accent); border-radius: 999px; }
.upload-progress p { margin: 6px 0 0; font-size: 12px; color: var(--text); }
.upload-progress .upload-progress-hint { color: var(--muted); }
.upload-progress[data-status="error"] { background: #fff0ee; }
.upload-progress[data-status="error"] #uploadProgressStatus { color: #d6452f; }
.upload-progress[data-status="error"] progress { accent-color: #d6452f; }
.upload-progress[data-status="error"] progress::-webkit-progress-value { background: #d6452f; }
.upload-progress[data-status="error"] progress::-moz-progress-bar { background: #d6452f; }
.upload-progress[data-status="complete"] #uploadProgressStatus { color: #287b50; }

/* Result */
.result { margin-top: 18px; animation: pop .3s ease; }
@keyframes pop { from { opacity: 0; transform: translateY(8px);} to {opacity:1;transform:none;} }
.result-head { font-weight: 700; color: var(--accent-d); margin-bottom: 10px; }
.code-box, .link-row { display: flex; gap: 8px; align-items: center; margin-bottom: 10px; }
.code-text { flex: 1; font-size: 22px; font-weight: 800; letter-spacing: 2px; color: var(--text); }
.link-row input { flex: 1; font-size: 13px; color: var(--muted); }
.mini-btn {
  border: 1px solid var(--line);
  background: #fff;
  color: var(--accent-d);
  padding: 10px 12px;
  border-radius: 10px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: .2s;
}
.mini-btn:hover { background: var(--accent-soft); }
.result-tip { font-size: 12px; color: var(--muted); margin: 4px 0 0; }

/* Receive */
.code-entry { display: flex; gap: 10px; }
.code-entry input { flex: 1; min-width: 0; font-size: 18px; letter-spacing: 2px; text-transform: uppercase; font-weight: 700; }
.code-entry .primary-btn,
.pwd-row .primary-btn { width: auto; flex: 0 0 auto; min-width: 88px; }
.pwd-row { display: flex; gap: 10px; margin-top: 12px; }
.pwd-row input { flex: 1; min-width: 0; }

.receive-out { margin-top: 18px; }
.text-result {
  background: #fffdfc;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 16px;
  white-space: pre-wrap;
  word-break: break-word;
  font-size: 14px;
  line-height: 1.6;
}
.file-result { text-align: center; padding: 10px 0; }
.file-result .fr-icon { font-size: 46px; }
.file-result .fr-name { font-weight: 700; margin: 8px 0 2px; word-break: break-all; }
.file-result .fr-size { color: var(--muted); font-size: 13px; }
.file-result .primary-btn { margin-top: 14px; }

.msg { padding: 14px; border-radius: 12px; font-size: 14px; }
.msg.err { background: #fff0ee; color: #d6452f; }
.msg.info { background: var(--accent-soft); color: var(--accent-d); }
.spinner { text-align: center; color: var(--muted); padding: 20px; }

/* Footer */
.footer { text-align: center; color: var(--muted); font-size: 12px; padding: 10px 20px 30px; }
.footer b { color: var(--accent-d); }

/* Modal */
.modal {
  position: fixed; inset: 0;
  background: rgba(58,44,39,.45);
  display: flex; align-items: center; justify-content: center;
  padding: 20px; z-index: 50;
  animation: fade .2s ease;
}
@keyframes fade { from {opacity:0;} to {opacity:1;} }
.modal-card {
  background: #fff;
  border-radius: 20px;
  padding: 26px;
  width: 100%; max-width: 600px;
  max-height: 86vh; overflow: auto;
  position: relative;
  box-shadow: 0 20px 60px rgba(0,0,0,.2);
}
.modal-x { position: absolute; top: 16px; right: 16px; border: none; background: transparent; font-size: 18px; cursor: pointer; color: var(--muted); }
.modal-card h2 { margin: 0 0 6px; }
.muted { color: var(--muted); font-size: 13px; }
.err { color: #d6452f; font-size: 13px; min-height: 18px; margin: 8px 0 0; }
#adminLogin input { margin-top: 12px; }
#adminLogin .primary-btn { margin-top: 14px; }
#adminCodePanel label { display: block; margin-top: 16px; font-size: 13px; }
#recoveryToggle, #setupLogout { margin-top: 16px; }
#backupCode { margin: 12px 0; font-family: monospace; overflow-wrap: anywhere; }
.backup-actions { display: flex; flex-wrap: wrap; gap: 10px; }
.backup-actions .primary-btn { width: auto; flex: 1; }
button:disabled { opacity: .6; cursor: wait; }

.dash-head { display: flex; align-items: center; justify-content: space-between; }
.stats { display: flex; gap: 12px; margin: 16px 0; }
.stat {
  flex: 1; background: var(--accent-soft); border-radius: 14px; padding: 14px; text-align: center;
}
.stat .num { font-size: 24px; font-weight: 800; color: var(--accent-d); }
.stat .lbl { font-size: 12px; color: var(--muted); margin-top: 2px; }
.dash-actions { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 12px; }

.table-wrap { overflow-x: auto; }
.share-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.share-table th, .share-table td { text-align: left; padding: 10px 8px; border-bottom: 1px solid var(--line); }
.share-table th { color: var(--muted); font-weight: 600; }
.share-table .del { border: none; background: #fff0ee; color: #d6452f; border-radius: 8px; padding: 6px 10px; cursor: pointer; font-size: 12px; }
.share-table .code-cell { font-weight: 700; letter-spacing: 1px; }

/* Toast */
.toast {
  position: fixed; bottom: 28px; left: 50%; transform: translateX(-50%);
  background: #3a2c27; color: #fff; padding: 12px 20px; border-radius: 999px;
  font-size: 14px; z-index: 100; box-shadow: 0 8px 24px rgba(0,0,0,.25);
  animation: pop .25s ease;
}

@media (max-width: 520px) {
  .options { flex-direction: column; }
  .opt, .opt.grow { min-width: 0; }
}