*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --bg:#f5f6fa;--surface:#fff;--sidebar-bg:#1e1e2e;--sidebar-text:#cdd6f4;
  --accent:#6366f1;--accent-hover:#4f46e5;--text:#1e1b4b;--muted:#6b7280;
  --border:#e5e7eb;--danger:#ef4444;--radius:.75rem;
  --shadow:0 1px 3px rgba(0,0,0,.08),0 4px 16px rgba(0,0,0,.04);
  --t:150ms cubic-bezier(.4,0,.2,1);
}
body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;background:var(--bg);color:var(--text);height:100vh;overflow:hidden}
.app{display:flex;height:100vh}
.sidebar{width:220px;min-width:220px;background:var(--sidebar-bg);display:flex;flex-direction:column;padding:1.25rem 0;border-right:1px solid rgba(255,255,255,.06)}
.sidebar-logo{display:flex;align-items:center;gap:.625rem;padding:0 1.25rem 1.25rem;font-weight:700;font-size:1.1rem;color:#fff;border-bottom:1px solid rgba(255,255,255,.08)}
.account-info{display:flex;align-items:center;gap:.625rem;padding:.875rem 1.25rem;border-bottom:1px solid rgba(255,255,255,.08);margin-bottom:.5rem}
.avatar{width:32px;height:32px;border-radius:50%;background:var(--accent);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:.875rem;color:#fff;flex-shrink:0}
.account-email{font-size:.75rem;color:var(--sidebar-text);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.sidebar-nav{flex:1;padding:0 .75rem;display:flex;flex-direction:column;gap:.125rem}
.nav-item{display:flex;align-items:center;gap:.625rem;padding:.5rem .75rem;border-radius:.5rem;color:var(--sidebar-text);text-decoration:none;font-size:.875rem;font-weight:500;transition:background var(--t),color var(--t),transform var(--t);position:relative}
.nav-item:hover{background:rgba(99,102,241,.18);color:#fff;transform:translateX(3px)}
.nav-item:active{transform:scale(.96)}
.nav-item.active{background:var(--accent);color:#fff;box-shadow:0 2px 8px rgba(99,102,241,.4)}
.sidebar-logout{display:flex;align-items:center;gap:.625rem;padding:.5rem 1.5rem .5rem 1.5rem;color:#f38ba8;text-decoration:none;font-size:.875rem;font-weight:500;transition:background var(--t),transform var(--t);border-top:1px solid rgba(255,255,255,.08);margin-top:.5rem;padding-top:.75rem}
.sidebar-logout:hover{background:rgba(243,139,168,.12);transform:translateX(3px)}
.sidebar-logout:active{transform:scale(.96)}
.main{flex:1;display:flex;flex-direction:column;overflow:hidden}
.toolbar{display:flex;align-items:center;justify-content:space-between;padding:1rem 1.5rem;background:var(--surface);border-bottom:1px solid var(--border);box-shadow:var(--shadow)}
.folder-title{font-size:1.1rem;font-weight:700;color:var(--text)}
.message-list{flex:1;overflow-y:auto;padding:.75rem 1rem}
.message-row{display:grid;grid-template-columns:180px 1fr 110px;align-items:center;gap:1rem;padding:.75rem 1rem;border-radius:.625rem;margin-bottom:.25rem;text-decoration:none;color:var(--text);background:var(--surface);border:1px solid var(--border);transition:box-shadow var(--t),transform var(--t),border-color var(--t)}
.message-row:hover{box-shadow:0 4px 20px rgba(0,0,0,.1);transform:translateY(-2px);border-color:var(--accent)}
.message-row:active{transform:scale(.99)}
.msg-from{font-weight:600;font-size:.875rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.msg-subject{font-size:.875rem;color:var(--muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.msg-date{font-size:.75rem;color:var(--muted);text-align:right;white-space:nowrap}
.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:1rem;height:60%;color:var(--muted)}
.btn{display:inline-flex;align-items:center;gap:.375rem;padding:.5rem 1rem;border-radius:.5rem;border:none;font-size:.875rem;font-weight:500;cursor:pointer;transition:background var(--t),box-shadow var(--t),transform var(--t)}
.btn:active{transform:scale(.95)}
.btn-ghost{background:transparent;color:var(--muted)}
.btn-ghost:hover{background:var(--border);color:var(--text)}
.btn-primary{background:var(--accent);color:#fff;box-shadow:0 2px 8px rgba(99,102,241,.3)}
.btn-primary:hover{background:var(--accent-hover);box-shadow:0 4px 16px rgba(99,102,241,.4);transform:translateY(-1px)}
.btn-danger{background:var(--danger);color:#fff}
.btn-danger:hover{background:#dc2626;box-shadow:0 4px 12px rgba(239,68,68,.3);transform:translateY(-1px)}
.btn-sm{padding:.375rem .75rem;font-size:.8125rem}
.login-wrap{display:flex;align-items:center;justify-content:center;min-height:100vh;background:linear-gradient(135deg,#1e1e2e 0%,#2d1b69 100%)}
.login-card{background:var(--surface);border-radius:1.25rem;padding:2.5rem;width:100%;max-width:400px;box-shadow:0 8px 48px rgba(0,0,0,.24);animation:slideUp .4s cubic-bezier(.4,0,.2,1)}
@keyframes slideUp{from{opacity:0;transform:translateY(16px)}to{opacity:1;transform:translateY(0)}}
.login-logo{display:flex;align-items:center;gap:.625rem;margin-bottom:2rem;font-weight:700;font-size:1.25rem}
.login-title{font-size:1.5rem;font-weight:700;margin-bottom:.25rem}
.login-sub{color:var(--muted);font-size:.875rem;margin-bottom:1.75rem}
.form-group{margin-bottom:1.25rem}
.form-label{display:block;font-size:.8125rem;font-weight:600;margin-bottom:.375rem;color:var(--muted);text-transform:uppercase;letter-spacing:.05em}
.form-input{width:100%;padding:.625rem .875rem;border:2px solid var(--border);border-radius:.625rem;font-size:.9375rem;color:var(--text);background:var(--bg);transition:border-color var(--t),box-shadow var(--t);outline:none}
.form-input:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(99,102,241,.15);background:#fff}
.login-btn{width:100%;padding:.75rem;background:var(--accent);color:#fff;border:none;border-radius:.625rem;font-size:1rem;font-weight:600;cursor:pointer;transition:background var(--t),box-shadow var(--t),transform var(--t);margin-top:.5rem}
.login-btn:hover{background:var(--accent-hover);box-shadow:0 4px 20px rgba(99,102,241,.4);transform:translateY(-1px)}
.login-btn:active{transform:scale(.97)}
.login-error{background:#fee2e2;color:#991b1b;padding:.625rem .875rem;border-radius:.5rem;font-size:.875rem;margin-bottom:1rem;border-left:3px solid var(--danger)}
.settings-wrap{max-width:620px;margin:2rem auto;padding:0 1.5rem}
.settings-wrap h2{font-size:1.5rem;font-weight:700;margin-bottom:1.5rem}
.settings-section{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:1.5rem;margin-bottom:1.25rem;box-shadow:var(--shadow);transition:box-shadow var(--t)}
.settings-section:hover{box-shadow:0 4px 20px rgba(0,0,0,.08)}
.settings-section h3{font-size:1rem;font-weight:700;margin-bottom:1rem}
.code-block{background:var(--bg);padding:.625rem .875rem;border-radius:.5rem;font-family:monospace;font-size:.8125rem;word-break:break-all;border:1px solid var(--border)}
::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:#d1d5db;border-radius:3px}::-webkit-scrollbar-thumb:hover{background:#9ca3af}
body.reduce-motion *,body.reduce-motion *::before,body.reduce-motion *::after{animation-duration:.01ms!important;transition-duration:.01ms!important}
.message-view{padding:1.5rem;max-width:800px}
.message-header{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:1.25rem;margin-bottom:1rem;box-shadow:var(--shadow)}
.message-body{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:1.5rem;white-space:pre-wrap;font-size:.9375rem;line-height:1.6;box-shadow:var(--shadow)}