:root{--ink:#17213a;--muted:#76809a;--line:#e8eaf3;--bg:#f7f8ff;--blue:#3157f5;--violet:#6d4aff;--cyan:#18cbd2;--danger:#dc3545}*{box-sizing:border-box}body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,Segoe UI,sans-serif;color:var(--ink);background:var(--bg)}a{text-decoration:none;color:inherit}button,input,textarea,select{font:inherit}.brand{font-size:24px;font-weight:400;color:#3352da}.brand span{font-weight:850;color:#162da4}.brand.big{font-size:32px}.login-shell,.compose-shell,.settings-shell,.reader-shell{min-height:100vh;padding:32px;background:radial-gradient(circle at 90% 10%,#eeeaff 0,transparent 28%),linear-gradient(135deg,#fff,#f7f8ff)}.login-shell{display:grid;place-items:center}.login-card,.compose-card,.settings-card,.reader-card{background:#fff;border:1px solid var(--line);border-radius:24px;box-shadow:0 25px 70px #4b52a012}.login-card{width:min(440px,92vw);padding:34px}.muted,small{color:var(--muted)}label{display:block;font-size:13px;font-weight:700;margin:16px 0 7px}input,textarea,select{width:100%;border:1px solid #dfe3ef;background:#fff;border-radius:12px;padding:12px 14px;outline:none}input:focus,textarea:focus,select:focus{border-color:#7d78ff;box-shadow:0 0 0 3px #6d4aff12}.primary,.compose-btn{border:0;color:white;background:linear-gradient(100deg,var(--violet),var(--blue),var(--cyan));border-radius:12px;padding:12px 18px;font-weight:750;cursor:pointer}.wide{width:100%;margin:20px 0 12px}.grid2{display:grid;grid-template-columns:1fr 1fr;gap:14px}.full{grid-column:1/-1}.advanced{margin-top:14px;color:var(--muted)}.alert{padding:11px 13px;border-radius:11px;margin:14px 0;font-size:13px}.danger{background:#fff0f1;color:#a62531}.ok{background:#ecfff5;color:#157245}.app-shell{display:grid;grid-template-columns:250px 1fr;min-height:100vh;background:#fff}.sidebar{padding:26px 18px 18px;border-right:1px solid var(--line);background:linear-gradient(180deg,#fff,#fbfbff);display:flex;flex-direction:column;gap:20px}.compose-btn{text-align:center;padding:14px}.sidebar nav{display:grid;gap:4px}.sidebar nav a{padding:10px 11px;border-radius:10px;color:#33405f;font-size:14px}.sidebar nav a.active{background:#efefff;color:#273ed0;font-weight:800}.sidebar nav a em{float:right;background:#4058ef;color:#fff;font-style:normal;border-radius:8px;padding:1px 6px;font-size:11px}.nav-title{font-size:10px;color:#9098aa;font-weight:850;border-top:1px solid var(--line);padding-top:17px}.account-box{margin-top:auto;border:1px solid var(--line);border-radius:14px;padding:10px;display:grid;grid-template-columns:36px 1fr auto;align-items:center;gap:8px}.account-box small{display:block;max-width:135px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.account-box button{border:0;background:none;cursor:pointer}.avatar{width:38px;height:38px;border-radius:50%;display:grid;place-items:center;background:#e9ecf6;font-weight:800;font-size:12px}.avatar.accent{color:#fff;background:linear-gradient(145deg,#7048ff,#20becb)}.mail-main{min-width:0}.topbar{height:82px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 28px}.search{width:min(520px,55%);border:1px solid #dfe3ef;border-radius:14px;padding:11px 15px;color:#7a8297}.search input{border:0;padding:0 8px;box-shadow:none}.top-user{font-size:13px}.dot{display:inline-block;width:8px;height:8px;border-radius:50%;background:#1bc97f;margin-right:7px}.mobile-brand{display:none}.mail-grid{display:grid;grid-template-columns:minmax(390px,42%) 1fr;min-height:calc(100vh - 82px)}.list-pane{border-right:1px solid var(--line);min-width:0}.pane-head,.tabs{display:flex;justify-content:space-between;align-items:center;padding:19px 22px}.pane-head span{font-size:12px;color:#3157f5;margin-left:8px}.tabs{padding-top:0;gap:18px;justify-content:flex-start;font-size:12px;color:#838ba0;border-bottom:1px solid var(--line)}.tabs b{color:#3157f5;border-bottom:2px solid #3157f5;padding-bottom:12px}.message-row{display:grid;grid-template-columns:42px 1fr auto;gap:10px;padding:15px 18px;border-bottom:1px solid #eff1f7;align-items:start}.message-row:hover{background:#fafbff}.message-row.unread{background:#f7f8ff}.message-copy{min-width:0}.message-copy>div{display:flex;justify-content:space-between;gap:10px}.message-copy b,.message-copy strong,.message-copy small{display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.message-copy strong{font-size:13px;margin:4px 0}.message-copy small,time{font-size:11px;color:#8a92a6}.star{font-size:13px;color:#f2a900}.pagination{display:flex;gap:14px;justify-content:flex-end;padding:15px 20px}.welcome-pane{display:grid;place-content:center;text-align:center;padding:40px}.welcome-icon{font-size:64px;color:#5b54ef}.welcome-pane p{color:var(--muted)}.summary-cards{display:flex;gap:10px;margin-top:25px}.summary-cards div{min-width:110px;border:1px solid var(--line);padding:15px;border-radius:15px}.summary-cards b,.summary-cards small{display:block}.reader-top{max-width:1180px;margin:auto;display:flex;justify-content:space-between;align-items:center;padding:5px 0 24px}.reader-card,.compose-card,.settings-card{max-width:1120px;margin:auto;padding:30px}.reader-actions{display:flex;gap:8px;border-bottom:1px solid var(--line);padding-bottom:16px;flex-wrap:wrap}.reader-actions button,.reader-actions a{border:0;background:#f7f8fc;border-radius:9px;padding:8px 11px;cursor:pointer}.danger-text{color:var(--danger)}.reader-card h1{font-size:27px;margin:28px 0}.sender{display:grid;grid-template-columns:45px 1fr auto;gap:12px;align-items:center}.sender small{display:block}.mail-body{padding:30px 0;line-height:1.65;overflow:auto;border-bottom:1px solid var(--line)}.mail-body img{max-width:100%;height:auto}.attachments{padding:20px 0}.attachments>a{display:grid;grid-template-columns:30px 1fr 20px;align-items:center;border:1px solid var(--line);border-radius:13px;padding:12px;margin:8px 0}.attachments small{display:block}.reply-bar{display:flex;gap:10px;padding-top:20px}.secondary{border:1px solid var(--line);border-radius:12px;padding:12px 18px;background:#fff}.compose-card{max-width:900px}.compose-card h1,.settings-card h1{margin-top:0}.line{display:flex;align-items:center;gap:10px;border-bottom:1px solid var(--line)}.line label{width:70px;margin:0}.line input{border:0;box-shadow:none}.editor{min-height:360px;border:0;resize:vertical;padding:22px 8px}.compose-footer{display:flex;justify-content:space-between;border-top:1px solid var(--line);padding-top:16px}.attach{margin:0;border:1px solid var(--line);padding:11px 14px;border-radius:11px;cursor:pointer}.settings-card{max-width:850px}.empty{padding:50px;text-align:center;color:var(--muted)}@media(max-width:900px){.app-shell{grid-template-columns:82px 1fr}.sidebar{padding:20px 10px}.sidebar .brand{font-size:0}.sidebar .brand span{font-size:18px}.compose-btn b,.sidebar nav a{font-size:0}.sidebar nav a::first-letter{font-size:18px}.nav-title,.account-box div:nth-child(2){display:none}.account-box{grid-template-columns:1fr}.mail-grid{grid-template-columns:1fr}.welcome-pane{display:none}}@media(max-width:600px){.app-shell{display:block}.sidebar{display:none}.topbar{height:64px;padding:0 14px}.mobile-brand{display:block;font-weight:850;color:#2836b8}.search{width:55%;padding:8px}.top-user{display:none}.mail-grid{min-height:calc(100vh - 64px)}.pane-head{padding:14px}.tabs{overflow:auto;padding-left:14px}.message-row{padding:13px 14px}.login-shell,.compose-shell,.settings-shell,.reader-shell{padding:14px}.reader-card,.compose-card,.settings-card{padding:18px;border-radius:18px}.reader-card h1{font-size:21px}.reader-actions{overflow:auto;flex-wrap:nowrap}.sender{grid-template-columns:40px 1fr}.sender time{display:none}.grid2{grid-template-columns:1fr}.full{grid-column:auto}.reader-top .brand{font-size:18px}.summary-cards{display:none}.compose-card .line{display:block;padding:5px 0}.compose-card .line label{width:auto;margin-top:8px}}
/* Multi-tenant branding */
.primary,.compose-btn{background-color:var(--tenant-primary,#4f46e5)}