:root{color-scheme:light;--navy:#14213d;--blue:#2563eb;--bg:#f3f6fb;--card:#fff;--line:#dbe2ea;--muted:#64748b;--good:#15803d;--warn:#b45309;--bad:#b91c1c}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:#172033;font:15px/1.55 system-ui,-apple-system,"Noto Sans TC",sans-serif}a{color:var(--blue);text-decoration:none}.shell{display:grid;grid-template-columns:240px minmax(0,1fr);min-height:100vh}.sidebar{background:var(--navy);color:#fff;padding:24px 18px}.brand{font-size:18px;font-weight:800;margin-bottom:28px}.nav a{display:block;color:#cbd5e1;padding:10px 12px;border-radius:8px;margin:3px 0}.nav a:hover,.nav a.active{background:#263654;color:#fff}.main{padding:28px;min-width:0}.topbar{display:flex;justify-content:space-between;align-items:center;margin-bottom:22px}.topbar h1{margin:0;font-size:26px}.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:20px;margin-bottom:20px;box-shadow:0 1px 2px rgba(15,23,42,.04)}.grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}.metric strong{display:block;font-size:28px}.metric span,.muted{color:var(--muted)}table{border-collapse:collapse;width:100%}th,td{text-align:left;border-bottom:1px solid var(--line);padding:11px 9px;vertical-align:top}th{color:#475569;font-size:13px}input,select{width:100%;padding:9px 10px;border:1px solid #cbd5e1;border-radius:7px;background:#fff;font:inherit}input[type=checkbox]{width:auto}.form-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;align-items:end}.field label{display:block;font-size:13px;font-weight:700;margin-bottom:5px}.button,button{display:inline-block;border:0;border-radius:7px;padding:9px 14px;background:var(--blue);color:#fff;font:inherit;font-weight:700;cursor:pointer}.button.secondary,button.secondary{background:#475569}.button.danger,button.danger{background:var(--bad)}.status{display:inline-block;padding:2px 8px;border-radius:999px;font-size:12px;font-weight:700;background:#e2e8f0}.status.sent,.status.active{background:#dcfce7;color:var(--good)}.status.failed,.status.dead{background:#fee2e2;color:var(--bad)}.status.pending,.status.processing{background:#fef3c7;color:var(--warn)}.inline{display:inline}.login-wrap{min-height:100vh;display:grid;place-items:center;padding:20px}.login-card{width:min(420px,100%)}.error{padding:10px;border-radius:7px;background:#fee2e2;color:var(--bad);margin-bottom:14px}.code{font-family:ui-monospace,SFMono-Regular,monospace;font-size:12px;word-break:break-all}.empty{text-align:center;color:var(--muted);padding:30px}@media(max-width:900px){.shell{grid-template-columns:1fr}.sidebar{padding:14px}.nav{display:flex;overflow:auto;gap:4px}.nav a{white-space:nowrap}.main{padding:18px}.grid,.form-grid{grid-template-columns:1fr 1fr}}@media(max-width:560px){.grid,.form-grid{grid-template-columns:1fr}.table-wrap{overflow:auto}.topbar{align-items:flex-start;gap:12px}}