:root{color-scheme:dark;--bg: #0b1120;--panel: #111a2e;--panel-2: #0f1729;--border: #22304d;--text: #e2e8f0;--muted: #94a3b8;--accent: #38bdf8;--accent-strong: #0ea5e9;--ok: #34d399;--ok-bg: rgba(52, 211, 153, .08);--warn: #fbbf24;--warn-bg: rgba(251, 191, 36, .08);--err: #f87171;--err-bg: rgba(248, 113, 113, .1);--mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;--sans: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif}*{box-sizing:border-box}html,body{margin:0;padding:0;background:var(--bg);color:var(--text);font-family:var(--sans);-webkit-font-smoothing:antialiased}.app-shell{max-width:880px;margin:0 auto;padding:32px 20px 64px}.app-header{display:flex;align-items:center;gap:12px;margin-bottom:8px}.app-header h1{font-size:22px;margin:0;font-weight:650}.app-lock{width:28px;height:28px;color:var(--accent);flex:none}.app-subtitle{color:var(--muted);font-size:14px;margin:0 0 20px}.offline-assurance{background:var(--ok-bg);border:1px solid rgba(52,211,153,.35);border-radius:12px;color:var(--muted);font-size:13px;line-height:1.5;margin-bottom:16px;padding:14px 16px}.offline-assurance strong{color:var(--ok)}.panel{background:var(--panel);border:1px solid var(--border);border-radius:12px;padding:18px;margin-bottom:16px}.provenance{background:var(--panel-2);border:1px solid var(--border);border-radius:12px;padding:16px 18px;margin-bottom:16px}.provenance-title{display:flex;align-items:center;gap:8px;font-weight:600;font-size:14px;margin-bottom:8px;color:var(--ok)}.provenance p{margin:6px 0 0;font-size:13px;line-height:1.5;color:var(--muted)}.field{margin-bottom:16px}.field label{display:block;font-size:13px;font-weight:600;margin-bottom:6px}.field .hint{font-size:12px;color:var(--muted);margin:4px 0 8px}textarea,input[type=password]{width:100%;background:var(--panel-2);color:var(--text);border:1px solid var(--border);border-radius:8px;padding:10px 12px;font-family:var(--mono);font-size:12px;resize:vertical}textarea:focus,input[type=password]:focus{outline:none;border-color:var(--accent-strong)}textarea.message-input{min-height:120px}textarea.key-input{min-height:72px}.file-row{display:flex;align-items:center;gap:10px;margin-top:8px;flex-wrap:wrap}.file-label{font-size:12px;color:var(--accent);cursor:pointer}.file-label input{display:none}.file-name{font-size:12px;color:var(--muted)}.actions{display:flex;gap:10px;margin-top:4px}button{font-family:var(--sans);font-size:14px;font-weight:600;border-radius:8px;padding:10px 18px;border:1px solid transparent;cursor:pointer}button:disabled{opacity:.5;cursor:not-allowed}button.primary{background:var(--accent-strong);color:#04121f}button.ghost{background:transparent;color:var(--muted);border-color:var(--border)}.error{background:var(--err-bg);border:1px solid rgba(248,113,113,.35);color:var(--err);border-radius:8px;padding:12px 14px;font-size:13px;margin-top:12px}.fingerprint{background:var(--ok-bg);border:1px solid rgba(52,211,153,.35);border-radius:8px;padding:12px 14px;margin-bottom:12px}.fingerprint .label{font-size:12px;color:var(--muted);margin-bottom:4px}.fingerprint .value{font-family:var(--mono);font-size:12px;word-break:break-all;color:var(--ok)}.fingerprint .vault{font-family:var(--mono);font-size:11px;color:var(--muted);margin-top:6px;word-break:break-all}.legacy-note{font-size:12px;color:var(--warn);background:var(--warn-bg);border:1px solid rgba(251,191,36,.3);border-radius:8px;padding:10px 12px;margin-bottom:12px}.plaintext{background:var(--panel-2);border:1px solid var(--border);border-radius:8px;padding:14px;white-space:pre-wrap;word-break:break-word;font-family:var(--mono);font-size:13px;line-height:1.5}.plaintext-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px}.plaintext-header h2{font-size:14px;margin:0}