:root{
  --bg:#f5f7fb;
  --panel:#fff;
  --text:#111827;
  --muted:#7b8498;
  --line:#e8ebf1;
  --blue:#3b5bff;
  --blue2:#5573ff;
  --blue-soft:#eef2ff;
  --red:#e5484d;
  --yellow:#ffbb38;
  --shadow:0 12px 35px rgba(30,45,82,.07);
}
*{box-sizing:border-box}
html,body{margin:0;min-height:100%;font-family:Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",Arial,sans-serif;color:var(--text);background:var(--bg)}
a{text-decoration:none;color:inherit}
button,input,textarea{font:inherit}
button{cursor:pointer}
.app-shell{min-height:100vh;display:flex}
.sidebar{position:fixed;left:0;top:0;bottom:0;width:248px;background:#fff;border-right:1px solid var(--line);padding:22px 16px 16px;display:flex;flex-direction:column;z-index:10}
.brand{display:flex;align-items:center;gap:11px;padding:0 8px 20px}
.brand-icon{width:38px;height:38px;border-radius:12px;background:linear-gradient(145deg,var(--blue),#6a7eff);display:grid;place-items:center;color:#fff;font-size:18px;font-weight:850;box-shadow:0 8px 18px rgba(59,91,255,.2)}
.brand-icon.large{width:48px;height:48px;border-radius:15px;font-size:22px}
.brand-text{display:flex;flex-direction:column;line-height:1.05}.brand-text b{font-size:17px}.brand-text small{font-size:11px;color:var(--muted);margin-top:4px}
.compose-main{background:var(--blue);color:#fff;border-radius:12px;padding:13px 15px;margin:5px 0 18px;font-weight:750;text-align:center;box-shadow:0 8px 18px rgba(59,91,255,.16)}
.compose-main:hover{background:#304ee8}
.nav{display:grid;gap:3px}.nav a{height:42px;padding:0 12px;border-radius:10px;display:flex;align-items:center;gap:11px;color:#536075;font-size:14px}
.nav a:hover,.nav a.active{background:var(--blue-soft);color:var(--blue);font-weight:700}
.nav-icon{width:20px;text-align:center;font-size:16px}
.badge{margin-left:auto;background:var(--blue);color:white;min-width:22px;height:22px;padding:0 6px;border-radius:999px;display:grid;place-items:center;font-size:11px}
.count{margin-left:auto;font-size:12px}
.storage{margin-top:auto;padding:18px 8px 14px}.storage-row{display:flex;justify-content:space-between;color:var(--muted);font-size:10px;margin-bottom:7px}.storage-track{height:5px;background:#edf0f5;border-radius:99px;overflow:hidden}.storage-track i{height:100%;display:block;background:var(--blue);border-radius:99px}
.profile{border-top:1px solid var(--line);padding:16px 6px 0;display:flex;gap:9px;align-items:center}
.avatar,.sender-avatar{width:36px;height:36px;border-radius:50%;background:var(--blue-soft);color:var(--blue);display:grid;place-items:center;font-weight:800}
.profile-text{min-width:0;display:flex;flex:1;flex-direction:column}.profile-text b,.profile-text span{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.profile-text b{font-size:12px}.profile-text span{font-size:10px;color:var(--muted);margin-top:3px}.profile-menu{font-size:20px;color:var(--muted);padding:4px}
.content{margin-left:248px;width:calc(100% - 248px);min-height:100vh}
.topbar{height:76px;display:flex;align-items:center;justify-content:space-between;padding:0 28px;border-bottom:1px solid var(--line);background:rgba(255,255,255,.88);backdrop-filter:blur(14px);position:sticky;top:0;z-index:8}
.search{height:44px;width:min(620px,64vw);background:#f4f6fa;border:1px solid #edf0f5;border-radius:13px;display:flex;align-items:center;padding:0 14px;gap:8px}
.search span{font-size:23px;color:#8992a4;transform:rotate(-15deg)}.search input{border:0;background:transparent;outline:0;flex:1;font-size:14px}.search a{color:var(--muted);font-size:20px}
.address-chip{font-size:12px;color:#667085;border:1px solid var(--line);background:#fff;padding:8px 12px;border-radius:999px}
.mail-panel{margin:26px 28px;background:#fff;border:1px solid var(--line);border-radius:17px;box-shadow:var(--shadow);overflow:hidden}
.mail-heading{padding:22px 22px 16px;display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line)}.mail-heading h1{font-size:24px;margin:0 0 3px}.mail-heading span{font-size:12px;color:var(--muted)}.refresh{width:36px;height:36px;border:1px solid var(--line);border-radius:10px;display:grid;place-items:center;color:#697386}
.bulkbar{height:44px;border-bottom:1px solid var(--line);display:flex;align-items:center;padding:0 14px;gap:4px}.bulkbar button{border:0;background:transparent;color:#667085;border-radius:8px;padding:7px 10px;font-size:12px}.bulkbar button:hover{background:#f3f5f8}.bulkbar .danger{color:var(--red)}
.check{width:26px;height:28px;display:grid;place-items:center;cursor:pointer;flex:0 0 auto}.check input{display:none}.check span{width:16px;height:16px;border:1.5px solid #bdc4d0;border-radius:4px;background:#fff}.check input:checked+span{background:var(--blue);border-color:var(--blue);box-shadow:inset 0 0 0 3px #fff}
.message-list{min-height:320px}.mail-row{display:flex;align-items:center;min-height:54px;border-bottom:1px solid #f0f2f6;padding:0 14px;background:#fff}.mail-row:last-child{border-bottom:0}.mail-row:hover{background:#fafbfe}.mail-row.unread{background:#f5f7ff}.mail-row.unread .who,.mail-row.unread .preview b{font-weight:800}
.star-form{margin:0}.star{border:0;background:transparent;color:#c8ced8;font-size:18px;padding:7px}.star:hover,.star.on{color:var(--yellow)}.star.big{font-size:24px}
.mail-row-link{display:grid;grid-template-columns:210px minmax(0,1fr) 60px;gap:14px;align-items:center;flex:1;min-width:0;min-height:54px}.who{font-size:13px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.preview{min-width:0;display:flex;gap:6px;align-items:baseline}.preview b{font-size:13px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:45%}.preview span{font-size:12px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.mail-row time{font-size:11px;color:var(--muted);text-align:right}.draft-label{color:var(--red)}
.empty{padding:95px 20px;text-align:center}.empty-circle{width:56px;height:56px;border-radius:50%;background:var(--blue-soft);display:grid;place-items:center;color:var(--blue);margin:0 auto;font-size:23px}.empty h2{margin:14px 0 5px;font-size:18px}.empty p{margin:0;color:var(--muted);font-size:13px}
.reader{max-width:1100px;margin:24px auto;padding:0 24px}.reader-toolbar{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px}.reader-toolbar>a{width:38px;height:38px;border-radius:10px;border:1px solid var(--line);background:#fff;display:grid;place-items:center}.reader-toolbar form{display:flex;gap:6px}.reader-toolbar button{border:1px solid var(--line);background:#fff;border-radius:9px;padding:8px 11px;color:#667085}.reader-toolbar button.danger{color:var(--red)}
.message-card{background:#fff;border:1px solid var(--line);border-radius:17px;box-shadow:var(--shadow);padding:28px 32px}.message-title{display:flex;justify-content:space-between;gap:20px}.message-title h1{font-size:26px;margin:0 0 24px}.message-title form{margin:0}.sender-line{display:flex;align-items:center;gap:11px;padding-bottom:22px;border-bottom:1px solid var(--line)}.sender-meta{display:flex;flex:1;flex-direction:column}.sender-meta b{font-size:13px}.sender-meta span{font-size:11px;color:var(--muted);margin-top:3px}.sender-line time{font-size:11px;color:var(--muted)}
.letter{padding:30px 3px;min-height:240px}.letter pre{margin:0;white-space:pre-wrap;font:inherit;font-size:14px;line-height:1.7;color:#252d3d}.attachments{padding:20px 0;border-top:1px solid var(--line)}.attachments h3{font-size:13px;margin:0 0 12px}.attachment-grid{display:flex;gap:8px;flex-wrap:wrap}.attachment{display:flex;gap:9px;align-items:center;border:1px solid var(--line);border-radius:11px;padding:10px 12px;min-width:190px}.attachment:hover{background:#fafbfe}.file-icon{width:30px;height:30px;border-radius:8px;background:var(--blue-soft);color:var(--blue);display:grid;place-items:center}.attachment span:last-child{display:flex;flex-direction:column}.attachment b{font-size:11px;max-width:180px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.attachment small{font-size:10px;color:var(--muted);margin-top:3px}
.reply-actions{border-top:1px solid var(--line);padding-top:22px;display:flex;gap:8px}
.primary,.secondary{border-radius:10px;padding:10px 16px;border:0;font-weight:700;font-size:13px;display:inline-flex;align-items:center;justify-content:center}.primary{background:var(--blue);color:#fff}.primary:hover{background:#304ee8}.secondary{background:#f2f4f8;color:#526071}.full{width:100%;height:46px}
.compose-title{font-size:17px;font-weight:800}.compose-page{max-width:1100px;margin:24px auto;padding:0 24px}.compose-card{background:#fff;border:1px solid var(--line);border-radius:17px;box-shadow:var(--shadow);overflow:hidden}.compose-line{height:52px;display:grid;grid-template-columns:60px 1fr;align-items:center;border-bottom:1px solid var(--line);padding:0 20px}.compose-line label{font-size:12px;color:var(--muted)}.compose-line input{border:0;outline:0;width:100%;font-size:13px}.compose-card textarea{border:0;outline:0;resize:vertical;width:100%;min-height:420px;padding:22px 20px;font:inherit;font-size:14px;line-height:1.65}.compose-footer{border-top:1px solid var(--line);padding:15px 18px;display:flex;justify-content:space-between;align-items:center}.send-group{display:flex;gap:7px}.attach-btn{font-size:12px;color:#5f6a7e;cursor:pointer;padding:8px 10px;border-radius:9px}.attach-btn:hover{background:#f3f5f8}.draft-files{padding:10px 20px;border-top:1px solid var(--line);display:flex;gap:6px;flex-wrap:wrap}.draft-files span{font-size:11px;background:#f4f6fa;padding:6px 9px;border-radius:7px}
.flash-stack{position:fixed;right:20px;top:88px;z-index:30;display:grid;gap:8px}.flash{background:#fff;border:1px solid var(--line);border-radius:11px;box-shadow:var(--shadow);padding:12px 14px;font-size:12px}.flash.success{border-left:4px solid #36a269}.flash.error{border-left:4px solid var(--red)}
.guest{min-height:100vh}.login-layout{min-height:100vh;display:grid;grid-template-columns:minmax(0,1.25fr) minmax(420px,.75fr)}.login-visual{padding:54px 70px;background:radial-gradient(circle at 18% 0,#e7edff 0,transparent 35%),#f4f7ff;position:relative;overflow:hidden}.login-brand{display:flex;gap:12px;align-items:center}.login-brand div{display:flex;flex-direction:column}.login-brand b{font-size:19px}.login-brand span{font-size:12px;color:var(--muted)}.login-visual h1{font-size:46px;letter-spacing:-1.4px;line-height:1.08;margin:100px 0 18px;max-width:680px}.login-visual>p{font-size:17px;line-height:1.6;color:#647087;max-width:600px}
.login-preview{position:absolute;left:70px;right:-100px;bottom:-115px;height:330px;border-radius:24px 0 0 0;background:#fff;box-shadow:0 30px 70px rgba(51,70,125,.12);display:grid;grid-template-columns:150px 1fr;overflow:hidden}.preview-sidebar{background:#f6f7fb;border-right:1px solid var(--line)}.preview-mail{padding:35px}.preview-mail i{display:block;height:40px;border-bottom:1px solid var(--line);position:relative}.preview-mail i:before{content:"";position:absolute;left:0;top:12px;width:120px;height:8px;border-radius:8px;background:#dce3f5}.preview-mail i:after{content:"";position:absolute;left:150px;right:60px;top:12px;height:8px;border-radius:8px;background:#edf0f6}
.login-side{display:grid;place-items:center;background:#fff;padding:50px}.login-card{width:min(410px,100%)}.mobile-brand{display:none}.login-card h2{font-size:30px;margin:0 0 8px}.login-card>p{margin:0 0 30px;color:var(--muted);font-size:13px}.login-card label{display:block;font-size:12px;font-weight:700;margin:15px 0 7px}.login-card input{width:100%;height:46px;border:1px solid #dfe4ec;border-radius:11px;padding:0 12px;outline:0}.login-card input:focus{border-color:#9eb0ff;box-shadow:0 0 0 3px #edf1ff}.login-card .primary{margin-top:20px}.login-hint{border-top:1px solid var(--line);padding-top:18px;margin-top:20px;color:var(--muted);font-size:11px;line-height:1.6}
.setup-page{min-height:100vh;display:grid;place-items:center;background:radial-gradient(circle at 50% 0,#e6edff,transparent 40%),var(--bg);padding:30px}.setup-card{width:min(500px,100%);background:#fff;border:1px solid var(--line);border-radius:22px;box-shadow:var(--shadow);padding:36px}.setup-card .pill{display:inline-block;margin-left:10px;color:var(--blue);background:var(--blue-soft);padding:6px 9px;border-radius:999px;font-size:11px;font-weight:700;vertical-align:top}.setup-card h1{font-size:29px;margin:25px 0 8px}.setup-card>p{color:var(--muted);font-size:13px;line-height:1.6}.mailbox-input{display:flex;align-items:center;border:1px solid #dfe4ec;border-radius:11px;margin:24px 0 14px;overflow:hidden}.mailbox-input input{border:0;outline:0;flex:1;height:48px;padding:0 13px}.mailbox-input span{padding:0 13px;color:var(--muted);font-size:13px}
@media(max-width:900px){
  .sidebar{width:76px;padding:18px 10px}.brand{padding:0 8px 16px}.brand-text,.nav a span:not(.nav-icon),.nav .badge,.nav .count,.storage,.profile-text,.profile-menu{display:none}.compose-main{font-size:0;height:44px}.compose-main span{font-size:22px}.nav a{justify-content:center}.content{margin-left:76px;width:calc(100% - 76px)}.mail-row-link{grid-template-columns:150px minmax(0,1fr) 50px}.login-layout{grid-template-columns:1fr}.login-visual{display:none}.login-side{min-height:100vh}.mobile-brand{display:flex;gap:8px;align-items:center;margin-bottom:35px}
}
@media(max-width:650px){
  .topbar{padding:0 14px}.address-chip{display:none}.search{width:100%}.mail-panel{margin:12px}.mail-heading{padding:17px}.mail-row-link{grid-template-columns:1fr 44px;gap:8px}.who{grid-column:1}.preview{grid-column:1}.mail-row time{grid-column:2;grid-row:1/3}.preview span{display:none}.preview b{max-width:100%}.message-card{padding:20px}.reader,.compose-page{padding:0 12px}.compose-card textarea{min-height:330px}.compose-footer{align-items:flex-start;gap:10px;flex-direction:column}.login-side{padding:28px}
}