*{margin:0;padding:0;box-sizing:border-box}
body{font-family:'Google Sans',Roboto,Arial,sans-serif;background:#f6f8fc;color:#202124;height:100vh;overflow:hidden}

/* GATE */
#gate{position:fixed;inset:0;background:linear-gradient(135deg,#1a1a2e,#003366);display:flex;align-items:center;justify-content:center;z-index:9999;padding:16px}
#gate.hidden{display:none}
.gate-box{background:#fff;border-radius:16px;padding:40px 32px;width:100%;max-width:400px;box-shadow:0 24px 64px rgba(0,0,0,.35);text-align:center}
.gate-logo{font-size:22px;font-weight:700;color:#003366;margin-bottom:4px;letter-spacing:.5px}
.gate-sub{color:#5f6368;font-size:13px;margin-bottom:28px}
.gate-box h2{font-size:18px;font-weight:600;margin-bottom:20px;color:#202124}
.gate-field{width:100%;padding:11px 14px;border:1.5px solid #dadce0;border-radius:8px;font-size:15px;outline:none;margin-bottom:14px;font-family:inherit}
.gate-field:focus{border-color:#003366;box-shadow:0 0 0 3px rgba(0,51,102,.1)}
.gate-btn{width:100%;padding:12px;background:#003366;color:#fff;border:none;border-radius:8px;font-size:15px;font-weight:600;cursor:pointer;font-family:inherit}
.gate-btn:hover{background:#002244}
.gate-err{color:#d93025;font-size:13px;margin-top:-6px;margin-bottom:10px;display:none}

/* ONBOARDING */
#onboarding{position:fixed;inset:0;background:linear-gradient(135deg,#1a1a2e,#003366);display:flex;align-items:center;justify-content:center;z-index:9998;padding:16px}
#onboarding.hidden{display:none}
.onboard-box{background:#fff;border-radius:16px;padding:40px 32px;width:100%;max-width:420px;box-shadow:0 24px 64px rgba(0,0,0,.35)}
.onboard-box h1{font-size:22px;font-weight:700;color:#003366;margin-bottom:4px;letter-spacing:.5px}
.onboard-box>p{color:#5f6368;font-size:14px;margin-bottom:24px}
.field-group{margin-bottom:16px}
.field-group label{display:block;font-size:13px;font-weight:600;color:#3c4043;margin-bottom:5px}
.field-group input{width:100%;padding:11px 14px;border:1.5px solid #dadce0;border-radius:8px;font-size:15px;outline:none;font-family:inherit}
.field-group input:focus{border-color:#003366;box-shadow:0 0 0 3px rgba(0,51,102,.1)}
.email-preview{font-size:12px;color:#5f6368;margin-top:5px;min-height:16px}
.onboard-btn{width:100%;padding:13px;background:#003366;color:#fff;border:none;border-radius:8px;font-size:15px;font-weight:600;cursor:pointer;margin-top:6px;font-family:inherit}
.onboard-btn:hover{background:#002244}

/* APP */
#app{display:none;height:100vh;flex-direction:column}
#app.visible{display:flex}

/* TOPBAR */
.topbar{height:64px;background:#fff;display:flex;align-items:center;padding:0 16px;gap:8px;flex-shrink:0;z-index:100;border-bottom:1px solid #e0e0e0}
.menu-btn{background:none;border:none;cursor:pointer;padding:8px;border-radius:50%;color:#5f6368;font-size:18px;flex-shrink:0}
.menu-btn:hover{background:#f1f3f4}
.logo{font-size:18px;font-weight:700;color:#003366;white-space:nowrap;margin-right:8px;letter-spacing:.3px}
.search-wrap{flex:1;max-width:720px}
.search-bar{background:#eaf1fb;border-radius:24px;padding:10px 18px;display:flex;align-items:center;gap:10px;transition:all .2s;border:1px solid transparent}
.search-bar:focus-within{background:#fff;border-color:#c0c0c0;box-shadow:0 2px 8px rgba(0,0,0,.12)}
.search-icon{color:#5f6368;font-size:16px;flex-shrink:0}
#searchInput{border:none;outline:none;background:transparent;font-size:15px;flex:1;color:#202124;min-width:0}
#searchInput::placeholder{color:#5f6368}
#searchClear{display:none;background:none;border:none;cursor:pointer;font-size:16px;color:#5f6368;flex-shrink:0}
.topbar-right{margin-left:auto;display:flex;align-items:center;gap:8px}
.icon-btn{background:none;border:none;cursor:pointer;width:40px;height:40px;border-radius:50%;display:flex;align-items:center;justify-content:center;color:#5f6368;font-size:18px}
.icon-btn:hover{background:#f1f3f4}
.avatar-btn{width:36px;height:36px;border-radius:50%;border:none;cursor:pointer;font-size:14px;font-weight:700;color:#fff;display:flex;align-items:center;justify-content:center;flex-shrink:0}

/* PROFILE */
.profile-wrap{position:relative}
.profile-dropdown{position:absolute;top:52px;right:0;width:300px;background:#fff;border-radius:16px;box-shadow:0 4px 24px rgba(0,0,0,.22);z-index:500;display:none;flex-direction:column;align-items:center;padding:24px 20px 16px;border:1px solid #e0e0e0}
.profile-dropdown.open{display:flex}
.profile-big-avatar{width:72px;height:72px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:28px;font-weight:700;color:#fff;margin-bottom:10px}
.profile-name{font-size:16px;font-weight:600;color:#202124;margin-bottom:3px}
.profile-email{font-size:13px;color:#5f6368;margin-bottom:16px}
.profile-manage-btn{padding:9px 24px;border:1px solid #dadce0;border-radius:20px;background:#fff;font-size:13px;cursor:pointer;color:#3c4043}
.profile-manage-btn:hover{background:#f1f3f4}
.profile-hr{width:100%;height:1px;background:#e0e0e0;margin:14px 0 10px}
.profile-signout{width:100%;padding:9px;border:1px solid #dadce0;border-radius:20px;background:#fff;font-size:13px;cursor:pointer;color:#3c4043}
.profile-signout:hover{background:#fce8e6;border-color:#d93025;color:#d93025}

/* LAYOUT */
.main{display:flex;flex:1;overflow:hidden}
.sidebar-overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,.4);z-index:49}
.sidebar-overlay.open{display:block}

/* SIDEBAR */
.sidebar{width:256px;background:#fff;padding:8px 0 16px;overflow-y:auto;flex-shrink:0;z-index:50;transition:transform .25s}
.compose-btn{margin:8px 16px 12px;padding:16px 20px;background:#003366;color:#fff;border:none;border-radius:16px;font-size:14px;font-weight:600;cursor:pointer;display:flex;align-items:center;gap:10px;width:calc(100% - 32px);box-shadow:0 2px 6px rgba(0,51,102,.3);font-family:inherit}
.compose-btn:hover{background:#002244}
.nav-item{display:flex;align-items:center;gap:14px;padding:8px 16px 8px 20px;border-radius:0 24px 24px 0;cursor:pointer;font-size:14px;font-weight:500;color:#202124;transition:background .15s;margin-right:16px;min-height:36px}
.nav-item:hover{background:#f1f3f4}
.nav-item.active{background:#d3e3fd;font-weight:700}
.nav-icon{font-size:18px;width:20px;text-align:center;flex-shrink:0}
.nav-label{flex:1}
.nav-badge{background:#003366;color:#fff;border-radius:12px;padding:1px 8px;font-size:11px;font-weight:700;min-width:20px;text-align:center}
.nav-divider{height:1px;background:#e0e0e0;margin:8px 16px}

/* EMAIL LIST */
.list-pane{width:380px;flex-shrink:0;overflow-y:auto;background:#f6f8fc;display:flex;flex-direction:column}
.list-header{padding:12px 16px;font-size:16px;font-weight:600;color:#202124;display:flex;align-items:center;justify-content:space-between;position:sticky;top:0;background:#f6f8fc;z-index:1;border-bottom:1px solid #e8eaed}
.list-header-count{font-size:12px;color:#5f6368;font-weight:400}
.email-row{background:#fff;margin:2px 8px;border-radius:8px;padding:12px 14px;cursor:pointer;display:grid;grid-template-columns:40px 1fr auto;grid-template-rows:auto auto;column-gap:12px;row-gap:2px;transition:box-shadow .15s;position:relative;border:1px solid transparent}
.email-row:hover{box-shadow:0 1px 6px rgba(0,0,0,.12);border-color:#e0e0e0}
.email-row.selected{box-shadow:0 1px 6px rgba(0,0,0,.15);border-color:#c5d8f6;background:#e8f0fe}
.email-row.unread{background:#fff}
.email-row.unread .row-sender{font-weight:700}
.email-row.unread .row-subject{font-weight:700;color:#202124}
.email-row.unread::before{content:'';position:absolute;left:0;top:0;bottom:0;width:4px;background:#003366;border-radius:8px 0 0 8px}
.row-avatar{width:36px;height:36px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:700;color:#fff;grid-row:1/3;align-self:center}
.row-sender{font-size:13px;font-weight:500;color:#3c4043;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;align-self:center}
.row-time{font-size:11px;color:#5f6368;white-space:nowrap;align-self:center;text-align:right}
.row-subject{font-size:13px;color:#444746;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;grid-column:2/4}
.row-star{display:none;position:absolute;right:10px;top:10px;background:none;border:none;cursor:pointer;font-size:15px;color:#bdbdbd}
.row-star.starred{display:block;color:#f4b400}
.email-row:hover .row-star{display:block}
.row-star:hover{color:#f4b400}

/* READING PANE */
.reading-pane{flex:1;overflow-y:auto;background:#f6f8fc;display:flex;flex-direction:column}
.reading-empty{display:flex;flex-direction:column;align-items:center;justify-content:center;flex:1;color:#9aa0a6;gap:12px;text-align:center}
.reading-empty-icon{font-size:64px;opacity:.2}
.reading-empty p{font-size:15px}

/* EMAIL VIEW */
.email-view{padding:20px 24px 40px;max-width:900px;width:100%}
.ev-subject{font-size:24px;font-weight:400;color:#202124;margin-bottom:20px;line-height:1.3;padding-right:40px}
.ev-card{background:#fff;border-radius:12px;border:1px solid #e0e0e0;margin-bottom:12px;overflow:visible}
.ev-card-header{padding:16px 20px 12px;display:flex;align-items:flex-start;gap:14px}
.ev-avatar{width:44px;height:44px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:16px;font-weight:700;color:#fff;flex-shrink:0}
.ev-from-block{flex:1;min-width:0}
.ev-from-name{font-size:14px;font-weight:600;color:#202124;display:flex;align-items:center;gap:6px}
.ev-from-detail{font-size:12px;color:#5f6368;margin-top:2px;line-height:1.5}
.ev-date{font-size:12px;color:#5f6368;flex-shrink:0;white-space:nowrap;padding-top:2px}
.ev-header-btns{display:flex;align-items:center;gap:2px;flex-shrink:0}
.ev-header-btn{background:none;border:none;cursor:pointer;width:34px;height:34px;border-radius:50%;display:flex;align-items:center;justify-content:center;color:#5f6368;font-size:16px}
.ev-header-btn:hover{background:#f1f3f4}
.ev-divider{height:1px;background:#f0f0f0;margin:0 20px}
.ev-body{padding:20px 20px 24px;font-size:14px;line-height:1.8;color:#3c4043}
.ev-body p{margin-bottom:12px}
.ev-body blockquote{border-left:3px solid #dadce0;padding-left:12px;color:#5f6368;margin:12px 0}
.ev-body code{background:#f1f3f4;padding:1px 5px;border-radius:3px;font-family:monospace;font-size:13px}

/* REPLY AREA */
.ev-reply-area{background:#fff;border-radius:12px;border:1px solid #e0e0e0;padding:16px 20px;display:flex;gap:14px;align-items:flex-start}
.ev-reply-avatar{width:36px;height:36px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:700;color:#fff;flex-shrink:0;margin-top:2px}
.ev-reply-input{flex:1;min-height:44px;border:1px solid #e0e0e0;border-radius:8px;padding:10px 14px;font-size:14px;color:#3c4043;cursor:text;background:#fff;outline:none;font-family:inherit;resize:none;line-height:1.6}
.ev-reply-input:focus{border-color:#1a73e8;box-shadow:0 0 0 2px rgba(26,115,232,.12)}
.ev-reply-actions{display:flex;gap:8px;margin-top:10px;justify-content:flex-end}
.ev-reply-send{padding:8px 22px;background:#1a73e8;color:#fff;border:none;border-radius:20px;font-size:13px;font-weight:600;cursor:pointer}
.ev-reply-send:hover{background:#1557b0}
.ev-reply-discard{padding:8px 14px;background:none;border:none;color:#5f6368;font-size:13px;cursor:pointer;border-radius:20px}
.ev-reply-discard:hover{background:#f1f3f4}
.ev-action-btns{display:flex;gap:8px;margin:16px 0 4px;padding:0 2px}
.ev-action-btn{display:flex;align-items:center;gap:6px;padding:8px 18px;border:1px solid #dadce0;border-radius:20px;background:#fff;font-size:13px;font-weight:500;cursor:pointer;color:#3c4043;transition:all .15s}
.ev-action-btn:hover{background:#f1f3f4;border-color:#c0c0c0}

/* COMPOSE OVERLAY */
.compose-overlay{position:fixed;bottom:0;right:24px;width:540px;background:#fff;border-radius:12px 12px 0 0;box-shadow:0 8px 40px rgba(0,0,0,.3);display:none;flex-direction:column;z-index:1000;max-height:80vh}
.compose-overlay.open{display:flex}
.compose-head{background:#202124;color:#fff;padding:12px 16px;border-radius:12px 12px 0 0;display:flex;align-items:center;justify-content:space-between}
.compose-title{font-size:14px;font-weight:500}
.compose-head-btns{display:flex;gap:4px}
.compose-head-btn{background:none;border:none;color:#fff;cursor:pointer;width:28px;height:28px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:16px}
.compose-head-btn:hover{background:rgba(255,255,255,.15)}
.compose-recipients{padding:0 16px}
.compose-field-row{display:flex;align-items:center;border-bottom:1px solid #f0f0f0;padding:8px 0;gap:8px}
.compose-field-label{font-size:13px;color:#5f6368;min-width:40px}
.compose-field-input{flex:1;border:none;outline:none;font-size:14px;color:#202124;background:transparent;font-family:inherit}
.compose-subject-row{padding:8px 16px;border-bottom:1px solid #f0f0f0}
.compose-subject-input{width:100%;border:none;outline:none;font-size:15px;font-weight:500;color:#202124;background:transparent;font-family:inherit}
.compose-body-wrap{flex:1;padding:12px 16px;overflow-y:auto}
.compose-body-input{width:100%;min-height:200px;border:none;outline:none;font-size:14px;color:#202124;resize:none;font-family:inherit;line-height:1.7;background:transparent}
.compose-footer{padding:12px 16px;display:flex;align-items:center;gap:8px;border-top:1px solid #f0f0f0}
.compose-send-btn{padding:9px 24px;background:#003366;color:#fff;border:none;border-radius:20px;font-size:14px;font-weight:600;cursor:pointer;font-family:inherit}
.compose-send-btn:hover{background:#002244}
.compose-discard-btn{margin-left:auto;background:none;border:none;cursor:pointer;font-size:18px;color:#5f6368;padding:6px;border-radius:50%}
.compose-discard-btn:hover{background:#f1f3f4;color:#d93025}

/* THREE DOT DROPDOWN */
.dots-menu{position:absolute;top:44px;right:8px;background:#fff;border-radius:8px;box-shadow:0 4px 16px rgba(0,0,0,.18);border:1px solid #e0e0e0;z-index:200;min-width:180px;display:none}
.dots-menu.open{display:block}
.dots-menu-item{padding:10px 16px;font-size:14px;cursor:pointer;color:#202124;display:flex;align-items:center;gap:10px}
.dots-menu-item:hover{background:#f1f3f4}

/* ERROR MODAL */
.modal-overlay{position:fixed;inset:0;background:rgba(0,0,0,.5);z-index:3000;display:none;align-items:center;justify-content:center;padding:16px}
.modal-overlay.open{display:flex}
.modal-box{background:#fff;border-radius:12px;width:100%;max-width:400px;overflow:hidden;box-shadow:0 8px 40px rgba(0,0,0,.3)}
.modal-header{background:#d93025;color:#fff;padding:16px 20px;display:flex;align-items:center;gap:10px}
.modal-header-icon{font-size:20px}
.modal-header-title{font-size:16px;font-weight:600}
.modal-body{padding:20px;font-size:14px;line-height:1.6;color:#3c4043}
.modal-footer{padding:12px 20px 16px;display:flex;justify-content:flex-end}
.modal-close-btn{padding:9px 24px;background:#d93025;color:#fff;border:none;border-radius:20px;font-size:14px;font-weight:600;cursor:pointer;font-family:inherit}
.modal-close-btn:hover{background:#b52a20}

/* MOBILE */
@media(max-width:900px){
  .sidebar{position:fixed;top:64px;left:0;bottom:0;transform:translateX(-100%);box-shadow:2px 0 16px rgba(0,0,0,.15)}
  .sidebar.open{transform:translateX(0)}
  .list-pane{width:100%}
  .reading-pane{display:none;position:fixed;inset:64px 0 0;z-index:80;overflow-y:auto;background:#f6f8fc}
  .reading-pane.mobile-open{display:flex;flex-direction:column}
  .compose-overlay{width:100%;right:0;border-radius:12px 12px 0 0}
  .ev-subject{font-size:18px}
  .email-view{padding:12px 14px 40px}
}
@media(max-width:600px){
  .search-wrap{max-width:none}
  .logo{display:none}
}
.back-btn{display:none;align-items:center;gap:6px;background:none;border:none;cursor:pointer;font-size:14px;color:#003366;font-weight:500;padding:12px 16px 4px;flex-shrink:0;font-family:inherit}
@media(max-width:900px){.back-btn{display:flex}}

.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%) translateY(80px);background:#202124;color:#fff;padding:10px 22px;border-radius:8px;font-size:14px;font-weight:500;z-index:2000;transition:transform .3s;pointer-events:none;box-shadow:0 4px 12px rgba(0,0,0,.3)}
.toast.show{transform:translateX(-50%) translateY(0)}