*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
    --bg:#08090e;
    --surface:#0e1019;
    --card:#131622;
    --card-hover:#1a1e2e;
    --border:rgba(99,102,241,.08);
    --border-hover:rgba(99,102,241,.18);
    --primary:#818cf8;
    --primary-dim:#6366f1;
    --text:#e8ecf4;
    --text-dim:#6b7394;
    --text-muted:#4b5372;
    --success:#22c55e;
    --error:#ef4444;
    --radius:10px;
    --radius-sm:6px;
    --radius-lg:14px;
    --font:'Inter',system-ui,-apple-system,sans-serif;
    --mono:'SF Mono','Fira Code',monospace;
    --ease:cubic-bezier(.4,0,.2,1)
}
html{scroll-behavior:smooth}
body{
    font-family:var(--font);
    background:var(--bg);
    color:var(--text);
    min-height:100vh;
    -webkit-font-smoothing:antialiased;
    line-height:1.5
}
::selection{background:var(--primary);color:#fff}

/* Loading */
.loading-screen{
    position:fixed;inset:0;
    display:flex;align-items:center;justify-content:center;
    background:var(--bg);z-index:9999
}
.spinner-lg{
    width:32px;height:32px;border:3px solid rgba(99,102,241,.15);
    border-top-color:var(--primary);border-radius:50%;
    animation:spin .7s linear infinite
}
@keyframes spin{to{transform:rotate(360deg)}}

/* ===== AUTH ===== */
.auth-page{
    min-height:100vh;
    display:flex;align-items:center;justify-content:center;
    padding:24px;position:relative
}
.auth-bg{
    position:fixed;top:-200px;left:50%;translate:-50% 0;
    width:700px;height:700px;
    background:radial-gradient(circle,rgba(99,102,241,.08) 0%,transparent 60%);
    pointer-events:none
}
.auth-card{
    position:relative;z-index:1;
    width:100%;max-width:400px;
    background:var(--card);border:1px solid var(--border);
    border-radius:var(--radius-lg);padding:36px 32px 28px;
    animation:fadeIn .4s var(--ease)
}
.auth-logo{
    display:flex;align-items:center;justify-content:center;
    gap:10px;font-size:20px;font-weight:700;margin-bottom:28px;
    color:var(--primary)
}
.auth-tabs{
    display:flex;gap:4px;
    background:var(--surface);border-radius:var(--radius-sm);
    padding:3px;margin-bottom:20px
}
.auth-tab{
    flex:1;padding:9px 16px;border:none;border-radius:5px;
    font-size:13px;font-weight:600;font-family:var(--font);
    cursor:pointer;transition:all .2s var(--ease);
    background:transparent;color:var(--text-dim)
}
.auth-tab.active{background:var(--card);color:var(--text);box-shadow:0 1px 4px rgba(0,0,0,.3)}
.auth-tab:hover:not(.active){color:var(--text)}
.auth-error{
    font-size:13px;color:var(--error);text-align:center;
    margin-bottom:12px;min-height:20px
}
.auth-form{display:flex;flex-direction:column;gap:14px}
.field{display:flex;flex-direction:column;gap:5px}
.field-label{font-size:12px;font-weight:600;color:var(--text-dim);text-transform:uppercase;letter-spacing:.4px}
.input{
    padding:10px 14px;background:var(--surface);
    border:1px solid var(--border);border-radius:var(--radius-sm);
    font-size:14px;font-family:var(--font);color:var(--text);
    outline:none;transition:border-color .2s var(--ease)
}
.input:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(99,102,241,.1)}
.input::placeholder{color:var(--text-muted)}
.auth-footer{
    margin-top:20px;padding-top:16px;
    border-top:1px solid var(--border);
    display:flex;align-items:center;justify-content:center;
    gap:6px;font-size:11px;color:var(--text-muted)
}

/* ===== BUTTONS ===== */
.btn{
    display:inline-flex;align-items:center;justify-content:center;
    gap:6px;padding:10px 20px;border:none;border-radius:var(--radius-sm);
    font-size:14px;font-weight:600;font-family:var(--font);
    cursor:pointer;transition:all .2s var(--ease);
    text-decoration:none
}
.btn:active{transform:scale(.97)}
.btn:disabled{opacity:.5;cursor:not-allowed;transform:none}
.btn-primary{
    background:linear-gradient(135deg,var(--primary-dim),var(--primary));
    color:#fff;box-shadow:0 4px 16px rgba(99,102,241,.2)
}
.btn-primary:hover:not(:disabled){
    box-shadow:0 8px 28px rgba(99,102,241,.3);
    transform:translateY(-1px)
}
.btn-full{width:100%}
.btn-ghost{
    background:transparent;color:var(--text-dim);
    padding:6px 12px;border-radius:var(--radius-sm);font-size:13px
}
.btn-ghost:hover{background:var(--card-hover);color:var(--text)}
.btn-sm{padding:8px 14px;font-size:13px}
.btn-xs{padding:4px 10px;font-size:11px}

/* ===== INBOX ===== */
.inbox-page{min-height:100vh;display:flex;flex-direction:column}
.topbar{
    background:rgba(8,9,14,.85);
    backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
    border-bottom:1px solid var(--border);position:sticky;top:0;z-index:100
}
.topbar-inner{
    max-width:800px;margin:0 auto;padding:0 20px;
    display:flex;align-items:center;height:56px;gap:16px
}
.topbar-left{
    display:flex;align-items:center;gap:8px;
    font-size:15px;font-weight:700;color:var(--primary);
    flex-shrink:0
}
.topbar-center{
    flex:1;display:flex;align-items:center;justify-content:center;gap:8px;
    min-width:0
}
.topbar-email{
    font-size:13px;font-family:var(--mono);color:var(--text-dim);
    overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
    max-width:280px
}
.topbar-right{flex-shrink:0}

.inbox-main{
    flex:1;max-width:800px;margin:0 auto;padding:24px 20px 60px;
    width:100%
}
.inbox-card{
    background:var(--card);border:1px solid var(--border);
    border-radius:var(--radius-lg);overflow:hidden
}
.inbox-card-header{
    display:flex;align-items:center;justify-content:space-between;
    padding:18px 20px;border-bottom:1px solid var(--border)
}
.inbox-card-title{
    display:flex;align-items:center;gap:8px;
    font-size:14px;font-weight:600
}
.badge{
    background:var(--primary-dim);color:#fff;
    font-size:11px;font-weight:700;padding:1px 10px;
    border-radius:99px;min-width:22px;text-align:center
}

.msg-list{padding:4px 0}
#msgContainer{display:flex;flex-direction:column}

.msg{
    padding:14px 20px;cursor:pointer;
    transition:all .15s var(--ease);
    border-bottom:1px solid var(--border);
    animation:slideIn .25s var(--ease) both
}
.msg:last-child{border-bottom:none}
.msg:hover{background:var(--card-hover);padding-left:24px}
.msg-from{font-size:13px;font-weight:600;color:var(--primary);margin-bottom:1px}
.msg-subj{font-size:14px;font-weight:600;margin-bottom:2px}
.msg-prev{font-size:13px;color:var(--text-dim);line-height:1.5;overflow:hidden;display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical}
.msg-time{font-size:11px;color:var(--text-muted);margin-top:4px}

.empty-state{
    display:flex;flex-direction:column;align-items:center;
    justify-content:center;padding:64px 24px;
    text-align:center;color:var(--text-dim)
}
.empty-state svg{margin-bottom:16px;color:var(--text-muted)}
.empty-state h3{font-size:16px;font-weight:600;margin-bottom:6px;color:var(--text)}
.empty-state p{font-size:13px;max-width:360px;line-height:1.6}
.empty-state strong{color:var(--primary);font-family:var(--mono);font-size:12px;word-break:break-all}
.empty-hint{margin-top:14px;font-size:10px;color:var(--text-muted);font-family:var(--mono);letter-spacing:.3px}
.test-btns{display:flex;gap:6px;margin-top:16px;flex-wrap:wrap;justify-content:center}
.test-btns .btn{font-size:11px;padding:6px 12px;border:1px solid var(--border);background:var(--surface)}
.test-btns .btn:hover{background:var(--card-hover);border-color:var(--border-hover)}

/* ===== MODAL ===== */
.modal{
    position:fixed;inset:0;z-index:1000;
    display:flex;align-items:center;justify-content:center;padding:20px
}
.modal-overlay{
    position:fixed;inset:0;
    background:rgba(0,0,0,.5);backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px)
}
.modal-panel{
    position:relative;z-index:1;
    background:var(--card);border:1px solid var(--border);
    border-radius:var(--radius-lg);width:100%;max-width:560px;
    max-height:80vh;display:flex;flex-direction:column;
    box-shadow:0 24px 80px rgba(0,0,0,.6);
    animation:modalIn .25s var(--ease)
}
.modal-top{
    display:flex;justify-content:space-between;align-items:center;
    padding:14px 18px;border-bottom:1px solid var(--border);flex-shrink:0
}
.modal-badge{font-size:12px;font-weight:600;color:var(--text-dim)}
.modal-x{
    width:30px;height:30px;border-radius:50%;
    border:1px solid var(--border);background:var(--surface);
    color:var(--text-dim);cursor:pointer;
    display:flex;align-items:center;justify-content:center;
    transition:all .2s var(--ease)
}
.modal-x:hover{background:var(--card-hover);color:var(--text);transform:rotate(90deg)}
.modal-body{padding:18px;overflow-y:auto;flex:1;min-height:120px}
.modal-body::-webkit-scrollbar{width:4px}
.modal-body::-webkit-scrollbar-thumb{background:var(--border-hover);border-radius:2px}
.spinner{
    width:24px;height:24px;border:2px solid var(--card-hover);
    border-top-color:var(--primary);border-radius:50%;
    animation:spin .7s linear infinite;margin:40px auto
}
.msg-detail-from{font-size:13px;color:var(--text-dim);margin-bottom:2px}
.msg-detail-subj{font-size:17px;font-weight:700;margin-bottom:8px}
.msg-detail-meta{font-size:12px;color:var(--text-muted);margin-bottom:16px;padding-bottom:12px;border-bottom:1px solid var(--border)}
.msg-detail-body{
    font-size:14px;color:var(--text);line-height:1.7;
    white-space:pre-wrap;word-break:break-word
}

/* ===== TOASTS ===== */
.toasts{
    position:fixed;bottom:20px;right:20px;z-index:2000;
    display:flex;flex-direction:column;gap:6px;
    pointer-events:none;max-width:360px
}
.toast{
    background:var(--card);border:1px solid var(--border);
    border-radius:var(--radius-sm);padding:10px 14px;
    font-size:13px;color:var(--text);
    pointer-events:auto;
    animation:toastIn .25s var(--ease);
    box-shadow:0 6px 24px rgba(0,0,0,.4)
}
.toast-success{border-color:rgba(34,197,94,.2)}
.toast-error{border-color:rgba(239,68,68,.2)}
.toast.removing{animation:toastOut .2s var(--ease) forwards}

/* ===== ANIMATIONS ===== */
@keyframes fadeIn{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}
@keyframes slideIn{from{opacity:0;transform:translateX(-10px)}to{opacity:1;transform:translateX(0)}}
@keyframes modalIn{from{opacity:0;transform:translateY(12px) scale(.98)}to{opacity:1;transform:translateY(0) scale(1)}}
@keyframes toastIn{from{opacity:0;transform:translateX(100%)}to{opacity:1;transform:translateX(0)}}
@keyframes toastOut{from{opacity:1;transform:translateX(0)}to{opacity:0;transform:translateX(100%)}}

/* ===== RESPONSIVE ===== */
@media(max-width:600px){
    .auth-card{padding:28px 20px 24px;border-radius:var(--radius);margin:12px}
    .topbar-inner{padding:0 12px;gap:8px}
    .topbar-email{max-width:160px;font-size:12px}
    .topbar-title{font-size:14px}
    .inbox-main{padding:16px 12px 40px}
    .msg{padding:12px 16px}
    .empty-state{padding:48px 20px}
    .modal{padding:12px}
    .modal-panel{max-height:90vh;border-radius:var(--radius)}
    .toasts{left:12px;right:12px;bottom:12px;max-width:unset}
}
@media(prefers-reduced-motion:reduce){
    *,*::before,*::after{animation-duration:.01ms!important;transition-duration:.01ms!important}
}