:root{--bg: #f6f7f9;--surface: #ffffff;--border: #e3e6ec;--text: #16181d;--muted: #6b7280;--accent: #2f6df6;--warn-bg: #fff8e6;--warn-border: #f0d9a0;--danger: #c0392b;--radius: 10px;color-scheme:light}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font:14px/1.5 -apple-system,BlinkMacSystemFont,Segoe UI,Noto Sans KR,sans-serif}code,.mono{font-family:ui-monospace,SFMono-Regular,Menlo,monospace}.muted{color:var(--muted)}.small{font-size:12px}.error{color:var(--danger);margin:12px 0 0}button{font:inherit;cursor:pointer;border-radius:8px}button:disabled{opacity:.5;cursor:not-allowed}.primary{background:var(--accent);color:#fff;border:none;padding:10px 16px;font-weight:600}.primary:hover:not(:disabled){background:#2258d4}.ghost{background:var(--surface);border:1px solid var(--border);color:var(--text);padding:6px 12px}.ghost:hover:not(:disabled){background:#f0f2f6}.ghost.danger{color:var(--danger);border-color:#f0c9c4}.block{display:block;width:100%;margin-top:16px}.centered{min-height:100vh;display:grid;place-items:center;padding:24px}.card{background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:28px;width:min(560px,100%);box-shadow:0 1px 3px #1018280f}.brand{margin:0 0 6px;font-size:22px;letter-spacing:-.02em}.onboarding-head{display:flex;align-items:flex-start;justify-content:space-between;gap:12px}.onboarding .muted{margin-top:0}.tabs{display:flex;gap:6px;margin:20px 0 4px;border-bottom:1px solid var(--border)}.tab{background:none;border:none;border-bottom:2px solid transparent;padding:8px 4px;margin-bottom:-1px;color:var(--muted);border-radius:0}.tab.active{color:var(--text);border-bottom-color:var(--accent);font-weight:600}.pane{padding-top:18px}.field-label{display:block;font-size:12px;font-weight:600;color:var(--muted);margin:14px 0 6px}.secret{display:flex;align-items:center;gap:8px;background:#f4f6fa;border:1px solid var(--border);border-radius:8px;padding:10px 12px}.secret code{flex:1;font-size:12px;word-break:break-all}.address{display:block;background:#f4f6fa;border:1px solid var(--border);border-radius:8px;padding:10px 12px;font-size:12px;word-break:break-all}.input{width:100%;padding:10px 12px;border:1px solid var(--border);border-radius:8px;font-size:13px;resize:vertical}.input:focus{outline:2px solid var(--accent);outline-offset:-1px}.warning,.banner{margin-top:16px;padding:12px 14px;border-radius:8px;font-size:13px;background:var(--warn-bg);border:1px solid var(--warn-border)}.checkbox{display:flex;gap:8px;align-items:flex-start;margin-top:14px;font-size:13px}.lang-toggle{padding:4px 8px;font-size:16px;line-height:1.1}.app{height:100vh;display:flex;flex-direction:column}.topbar{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:10px 18px;background:var(--surface);border-bottom:1px solid var(--border)}.identity{display:flex;align-items:center;gap:10px;min-width:0}.identity .label{font-size:12px;font-weight:600;color:var(--muted);white-space:nowrap}.address-pill{display:flex;align-items:center;gap:10px;min-width:0;max-width:88ch;background:#f4f6fa;border:1px solid var(--border);padding:5px 10px}.address-pill code{font-size:12px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.copy-hint{font-size:11px;color:var(--muted);white-space:nowrap}.actions{display:flex;align-items:center;gap:10px}.panes{flex:1;display:grid;grid-template-columns:minmax(280px,380px) 1fr;min-height:0}.pane-list{display:flex;flex-direction:column;min-height:0;background:var(--surface);border-right:1px solid var(--border)}.search{margin:10px;padding:8px 12px;border:1px solid var(--border);border-radius:8px;font-size:13px}.search:focus{outline:2px solid var(--accent);outline-offset:-1px}.list{list-style:none;margin:0;padding:0;overflow-y:auto;flex:1}.list-empty{padding:40px 20px;text-align:center}.row{display:block;width:100%;text-align:left;background:none;border:none;border-bottom:1px solid var(--border);padding:12px 16px;border-radius:0}.row:hover{background:#f7f9fc}.row.selected{background:#eaf1ff}.row.unread .row-subject{font-weight:700}.row.unread .sender:before{content:"";display:inline-block;width:6px;height:6px;border-radius:50%;background:var(--accent);margin-right:6px;vertical-align:middle}.row-top{display:flex;justify-content:space-between;gap:10px;font-size:12px}.sender{color:var(--text);font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.time{color:var(--muted);white-space:nowrap}.row-subject{margin:3px 0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.row-meta{display:flex;align-items:center;gap:8px}.undecryptable{color:var(--danger);font-style:italic}.chip{font-size:11px;background:#eef1f6;border:1px solid var(--border);border-radius:999px;padding:1px 8px;color:var(--muted)}.pane-reader{overflow-y:auto;min-height:0}.reader-empty{display:grid;place-items:center;height:100%}.reader{padding:22px 26px;max-width:900px}.reader-head{position:relative;padding-bottom:14px;border-bottom:1px solid var(--border)}.reader-head h2{margin:0 90px 8px 0;font-size:19px;letter-spacing:-.01em}.reader-meta{display:flex;flex-wrap:wrap;gap:12px;font-size:13px;color:var(--muted)}.reader-head .ghost{position:absolute;top:0;right:0}.banner{display:flex;align-items:center;justify-content:space-between;gap:12px}.banner.note{background:#eef4ff;border-color:#cfdcfa;color:#24457f}.banner.warn{background:#fdeeec;border-color:#f2c8c2;color:#7d2b20}.reader-frame{width:100%;min-height:420px;border:none;margin-top:18px;background:#fff}.reader-text{margin-top:18px;white-space:pre-wrap;word-break:break-word;font-family:inherit}.attachments{margin-top:24px;border-top:1px solid var(--border);padding-top:16px}.attachments h3{margin:0 0 10px;font-size:13px;color:var(--muted)}.attachments ul{list-style:none;margin:0;padding:0;display:grid;gap:8px}.attachments li{display:flex;align-items:center;gap:12px;background:var(--surface);border:1px solid var(--border);border-radius:8px;padding:10px 12px}.filename{flex:1;font-weight:500;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}@media(max-width:820px){.panes{grid-template-columns:1fr}.pane-reader{display:none}}