:root{
  --bg:#f4f0e9;
  --paper:#fffdf9;
  --ink:#161616;
  --muted:#746f68;
  --line:#d8d0c5;
  --soft:#ebe5dc;
  --accent:#b4472d;
  font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);min-height:100vh}
button,input,textarea,select{font:inherit;color:inherit}
button{cursor:pointer}
.shell{width:min(720px,100%);margin:0 auto;padding:calc(28px + env(safe-area-inset-top)) 18px calc(48px + env(safe-area-inset-bottom))}
.brand{padding:8px 4px 28px}
.brand h1{margin:0;font-size:clamp(28px,7vw,52px);line-height:.96;letter-spacing:.105em;font-weight:800}
.panel{background:var(--paper);border:1px solid var(--line);border-radius:28px;padding:22px;box-shadow:0 12px 32px rgba(44,34,22,.04)}
.mode-switch{display:grid;grid-template-columns:1fr 1fr;gap:6px;padding:5px;background:var(--soft);border-radius:18px;margin-bottom:24px}
.mode{border:0;background:transparent;border-radius:14px;padding:12px;font-weight:800;letter-spacing:.12em}
.mode.active{background:var(--paper);box-shadow:0 2px 7px rgba(0,0,0,.06)}
.field{display:block;margin:0 0 19px}
.field>span,.section-head>span{display:block;font-size:12px;font-weight:800;letter-spacing:.14em;margin-bottom:8px}
textarea,input,select{width:100%;border:1px solid var(--line);background:#fff;border-radius:16px;padding:14px;outline:none}
textarea:focus,input:focus,select:focus{border-color:var(--ink);box-shadow:0 0 0 3px rgba(22,22,22,.06)}
textarea{min-height:180px;resize:vertical;line-height:1.7}
small,.muted{color:var(--muted);line-height:1.55}
.file-field input{padding:11px}
.recipients-block{margin:8px 0 24px}
.section-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px}
.section-head>span{margin:0}
.text-button{border:0;background:transparent;font-weight:750;padding:8px 10px}
.text-button:disabled{opacity:.35;cursor:not-allowed}
.recipient-count{font-size:12px;color:var(--muted);font-weight:750;letter-spacing:.08em}
.recipient-actions{display:flex;gap:8px;margin:5px 0 8px}
.add-recipient{border:1px solid var(--line);border-radius:999px;background:#fff;font-size:12px;letter-spacing:.08em}
.recipient-row{display:grid;grid-template-columns:170px 1fr 40px;gap:7px;margin-bottom:8px;align-items:stretch}
.recipient-row input{border-radius:13px;padding:12px}
.recipient-channel-switch{display:grid;grid-template-columns:1fr 1fr;border:1px solid var(--line);border-radius:13px;overflow:hidden;background:#fff}
.recipient-channel-button{border:0;background:#fff;padding:0 10px;font-size:11px;font-weight:850;letter-spacing:.07em;color:var(--muted);cursor:pointer}
.recipient-channel-button+ .recipient-channel-button{border-left:1px solid var(--line)}
.recipient-channel-button.active{background:var(--ink);color:#fff}
.app-version{text-align:center;color:var(--muted);font-size:10px;letter-spacing:.1em;margin:14px 0 0}
.remove-recipient{border:1px solid var(--line);background:#fff;border-radius:13px;font-size:20px}
.primary,.secondary{width:100%;border-radius:999px;padding:15px 20px;font-weight:850;letter-spacing:.12em}
.primary{background:var(--ink);color:#fff;border:1px solid var(--ink)}
.primary:disabled{opacity:.45;cursor:not-allowed}
.secondary{background:transparent;border:1px solid var(--line);margin-top:20px}
.error{color:#a42e1f;min-height:1.4em;line-height:1.5}
.seal-mark{display:inline-block;border:1px solid var(--ink);border-radius:999px;padding:8px 11px;font-size:11px;font-weight:900;letter-spacing:.18em;margin-bottom:22px}
.seal-mark.open{background:var(--ink);color:#fff}
h2{font-size:26px;line-height:1.35;margin:0 0 14px}h3{margin:30px 0 8px;font-size:15px;letter-spacing:.08em}
.copy-row{display:grid;grid-template-columns:1fr auto;gap:8px;margin:10px 0}
.copy-row input{font-size:12px}
.copy-button{border:1px solid var(--line);border-radius:14px;background:#fff;padding:0 14px;font-weight:800;font-size:12px}
.message-panel{min-height:280px}
.message-sender{font-size:12px;font-weight:850;letter-spacing:.12em;color:var(--muted);margin:0 0 18px}
.message-sealed{font-size:11px;font-weight:750;letter-spacing:.12em;color:var(--muted);margin:-8px 0 22px}
.message-body{white-space:pre-wrap;font-size:18px;line-height:1.9;word-break:break-word}
.attachment-area{margin-top:28px}.attachment-image{display:block;width:100%;height:auto;max-height:70vh;object-fit:contain;border-radius:18px;background:#eee8df}.attachment-name{margin-top:12px;font-size:11px;font-weight:750;letter-spacing:.09em;color:var(--muted);overflow-wrap:anywhere}.attachment-download{margin-top:12px;border:1px solid var(--ink);border-radius:999px;padding:11px 15px;background:transparent;color:var(--ink);font:inherit;font-size:12px;font-weight:800;letter-spacing:.08em;cursor:pointer}.attachment-download.downloaded{border-color:#7b766e;color:#68635c}.attachment-download:disabled{cursor:default;opacity:.72}
@media(max-width:520px){.panel{border-radius:22px;padding:17px}.recipient-row{grid-template-columns:1fr 38px}.recipient-channel-switch{grid-column:1 / -1}.shell{padding-left:12px;padding-right:12px}}

.recipient-line-contact{border-radius:13px;padding:12px;min-width:0}
.recipient-row>[hidden]{display:none!important}
@media(max-width:520px){.recipient-line-contact{grid-column:1}}