:root{font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;color:#071437;background:#f5f8fa}*{box-sizing:border-box}body{margin:0}button,input,textarea{font:inherit}.login-screen{min-height:100vh;display:grid;place-items:center;background:linear-gradient(135deg,#071437,#101827)}.login-card{width:min(420px,calc(100vw - 32px));background:#fff;border-radius:10px;padding:28px;box-shadow:0 24px 80px #00000040;display:grid;gap:18px}.brand{display:flex;align-items:center;gap:12px}.brand span{width:38px;height:38px;display:grid;place-items:center;border-radius:10px;background:#7c3aed;color:#fff;font-weight:800}.brand strong{display:block}.brand small{color:#94a3b8}label{display:grid;gap:7px;color:#64748b;font-size:13px;font-weight:700}input,textarea{border:1px solid #dbe3ef;border-radius:8px;padding:10px 12px;outline:none;background:#fff}input:focus,textarea:focus{border-color:#2563eb;box-shadow:0 0 0 3px #2563eb1f}button{border:0;border-radius:8px;background:#0b1b48;color:#fff;font-weight:800;padding:10px 14px;cursor:pointer}button:disabled{opacity:.65;cursor:wait}.app-shell{display:grid;grid-template-columns:232px 390px 1fr;min-height:100vh}.sidebar{background:#101827;color:#fff;display:flex;flex-direction:column;gap:16px;padding:16px}.brand.mini{height:38px}.brand.mini span{width:32px;height:32px;font-size:12px}.compose-btn{background:#2563eb}.sidebar nav{display:grid;gap:6px}.sidebar nav button{background:transparent;text-align:left;color:#cbd5e1;font-weight:700}.sidebar nav button.active,.sidebar nav button:hover{background:#ffffff1a;color:#fff}.mail-list{border-right:1px solid #e2e8f0;background:#fff;min-width:0}.mail-list>header,.reader>header{min-height:64px;border-bottom:1px solid #e2e8f0;padding:14px 18px;display:flex;align-items:center;justify-content:space-between;gap:12px}.mail-list small,.reader small{display:block;color:#94a3b8}.actions{display:flex;gap:8px}.actions button,.ghost{background:#fff;color:#334155;border:1px solid #dbe3ef}.message-row{width:100%;display:grid;gap:4px;text-align:left;background:#fff;color:#071437;border-radius:0;border-bottom:1px solid #edf2f7;padding:14px 18px}.message-row:hover,.message-row.selected{background:#f8fafc}.message-row span{color:#64748b;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.reader{min-width:0;background:#f8fafc}.reader h1{font-size:18px;margin:0 0 4px}.reader p{margin:0;color:#64748b}.reader pre{margin:0;padding:24px;white-space:pre-wrap;word-break:break-word;font-family:inherit;color:#1e293b}.reader iframe{width:100%;height:calc(100vh - 66px);border:0;background:#fff}.empty{color:#94a3b8;padding:32px;text-align:center}.reader-empty{height:100vh;display:grid;place-items:center}.attachments{margin:0 24px 24px;border:1px solid #dbe3ef;border-radius:8px;background:#fff;padding:14px;display:grid;gap:8px}.modal-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;background:#0f172a73;display:grid;place-items:end center;padding:24px}.composer{width:min(760px,calc(100vw - 32px));background:#fff;border-radius:10px;box-shadow:0 24px 80px #00000040;display:grid;gap:10px;padding:16px}.composer header,.composer footer{display:flex;justify-content:space-between;gap:10px;align-items:center}.composer header button{background:transparent;color:#64748b;padding:6px 8px}@media (max-width: 1100px){.app-shell{grid-template-columns:210px 1fr}.reader{grid-column:1 / -1;min-height:55vh}}@media (max-width: 760px){.app-shell{grid-template-columns:1fr}.sidebar{position:static}}