:root{--md-sys-color-primary:#1a73e8;--md-sys-color-on-primary:#fff;--md-sys-color-surface:#f8f9fa;--md-sys-color-on-surface:#202124;--md-sys-color-on-surface-variant:#5f6368;--md-sys-color-outline:#dadce0;--shadow-1:0 1px 2px #3c40434d, 0 1px 3px 1px #3c404326;--shadow-2:0 4px 4px #3c40434d, 0 8px 12px 6px #3c404326;--transition:all .25s cubic-bezier(.4, 0, .2, 1)}*{box-sizing:border-box;margin:0;padding:0}body{background:var(--md-sys-color-surface);color:var(--md-sys-color-on-surface);height:100vh;font-family:Inter,system-ui,-apple-system,sans-serif;overflow:hidden}.app-layout{width:100vw;height:100vh;display:flex}.nav-rail{border-right:1px solid var(--md-sys-color-outline);z-index:100;background:#fff;flex-direction:column;align-items:center;gap:24px;width:80px;padding:16px 0;display:flex}.nav-brand{background:var(--md-sys-color-primary);color:#fff;border-radius:12px;justify-content:center;align-items:center;width:48px;height:48px;margin-bottom:32px;font-family:Outfit;font-size:24px;font-weight:700;display:flex}.nav-item{cursor:pointer;width:56px;height:56px;transition:var(--transition);color:var(--md-sys-color-on-surface-variant);background:0 0;border:none;border-radius:16px;justify-content:center;align-items:center;display:flex}.nav-item svg{fill:currentColor;width:24px;height:24px}.nav-item:hover{color:var(--md-sys-color-primary);background:#1a73e814}.nav-item.active{color:var(--md-sys-color-primary);background:#e8f0fe}.user-avatar{color:#fff;background:#5f6368;border-radius:50%;justify-content:center;align-items:center;width:40px;height:40px;font-weight:500;display:flex}.main-content{background:#fff;border-radius:24px 0 0;flex-direction:column;flex:1;margin-left:-1px;display:flex;position:relative}.app-header{justify-content:space-between;align-items:center;height:64px;padding:8px 16px;display:flex}.search-bar{background:#f1f3f4;border-radius:24px;align-items:center;gap:12px;width:100%;max-width:720px;height:48px;padding:0 16px;display:flex}.search-icon{fill:#5f6368;width:20px;height:20px}.search-bar input{background:0 0;border:none;outline:none;width:100%;font-size:16px}.mail-container{flex:1;padding:24px;overflow-y:auto}.folder-title{color:var(--md-sys-color-on-surface);margin-bottom:16px;font-family:Outfit;font-size:22px}.mail-list{flex-direction:column;display:flex}.mail-item{cursor:pointer;border-bottom:1px solid #f1f3f4;align-items:center;gap:16px;padding:12px 16px;transition:background .1s;display:flex}.mail-item:hover{background:#f5f5f5}.mail-item.unread{background:#e8f0fe;font-weight:600}.mail-sender-avatar{background:#e8eaed;border-radius:50%;justify-content:center;align-items:center;width:40px;height:40px;display:flex}.mail-info{flex:1;min-width:0}.mail-top-line{justify-content:space-between;margin-bottom:4px;display:flex}.mail-sender{color:#202124;font-size:14px}.mail-date{color:#5f6368;font-size:12px}.mail-subject{margin-bottom:2px;font-size:14px}.mail-snippet{color:#5f6368;white-space:nowrap;text-overflow:ellipsis;font-size:13px;overflow:hidden}.fab{color:#001d35;cursor:pointer;box-shadow:var(--shadow-1);transition:var(--transition);background:#c2e7ff;border:none;border-radius:16px;align-items:center;gap:12px;padding:16px 24px;font-family:Inter;font-weight:600;display:flex;position:absolute;bottom:24px;right:24px}.fab:hover{box-shadow:var(--shadow-2);background:#b3d7ef}.fab svg{width:24px;height:24px}.modal{z-index:1000;background:#00000080;justify-content:center;align-items:center;display:none;position:fixed;inset:0}.modal.active{display:flex}.modal-content{width:90%;max-width:600px;box-shadow:var(--shadow-2);background:#fff;border-radius:28px;padding:24px}.modal-header{justify-content:space-between;align-items:center;margin-bottom:24px;display:flex}.compose-form{flex-direction:column;gap:16px;display:flex}.form-field input,.form-field textarea{border:1px solid var(--md-sys-color-outline);border-radius:8px;width:100%;padding:12px;font-family:inherit;font-size:14px}.content-field textarea{resize:none;min-height:200px}.modal-actions{justify-content:flex-end;display:flex}.btn-primary{background:var(--md-sys-color-primary);color:#fff;cursor:pointer;border:none;border-radius:20px;padding:10px 24px;font-weight:600}.btn-primary:disabled{opacity:.6}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.empty-state{color:var(--md-sys-color-on-surface-variant);text-align:center;flex-direction:column;justify-content:center;align-items:center;padding:64px;display:flex}.empty-state svg{opacity:.3;width:64px;height:64px;margin-bottom:16px}.icon-btn{cursor:pointer;background:0 0;border:none;border-radius:50%;justify-content:center;align-items:center;padding:8px;font-size:20px;display:flex}.icon-btn:hover{background:#f1f3f4}