@import url('https://fonts.googleapis.com/css2?family=Segoe+UI:ital,wght@0,300;0,400;0,600;0,700;1,400;1,700&display=swap');
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
:root{--accent:#4fc3f7;--serif:'Segoe UI','Times New Roman',serif;--text-dim:rgba(255,255,255,.72);--text-muted:rgba(255,255,255,.42);}
html,body{height:100%;font-family:var(--serif);overflow:hidden;}
body{background:#0a0e1a url('https://wallpapercave.com/wp/oIjh2fW.jpg') center/cover fixed;color:#fff;display:flex;align-items:center;justify-content:center;}
body::before{content:'';position:fixed;inset:0;z-index:0;pointer-events:none;background:rgba(0,6,30,.62);}
.login-window{position:relative;z-index:1;background:rgba(12,28,68,.90);backdrop-filter:blur(28px);-webkit-backdrop-filter:blur(28px);border:1px solid rgba(100,160,255,.35);border-radius:8px;box-shadow:0 24px 80px rgba(0,0,0,.72),inset 0 1px 0 rgba(255,255,255,.14);width:min(420px,94vw);overflow:hidden;animation:winPop .28s cubic-bezier(.22,.8,.36,1);}
@keyframes winPop{from{opacity:0;transform:scale(.92) translateY(18px)}to{opacity:1;transform:none}}
.login-titlebar{display:flex;align-items:center;gap:8px;padding:8px 12px;background:linear-gradient(180deg,#3a78d0 0%,#1a56b0 50%,#1246a0 100%);border-bottom:1px solid rgba(0,40,140,.60);}
.login-title{flex:1;font-size:13px;font-weight:600;color:rgba(255,255,255,.92);}
.win-ctrl{width:22px;height:22px;border-radius:3px;border:1px solid rgba(255,255,255,.28);display:flex;align-items:center;justify-content:center;font-size:10px;color:rgba(255,255,255,.86);cursor:pointer;background:linear-gradient(180deg,rgba(255,255,255,.22),rgba(255,255,255,.08));transition:filter .12s;user-select:none;}
.win-ctrl:hover{filter:brightness(1.35);}
.win-ctrl.close{background:linear-gradient(180deg,rgba(255,90,70,.85),rgba(180,30,15,.95));border-color:rgba(140,20,10,.5);}
.login-card{padding:32px 32px 28px;}
.login-logo{text-align:center;margin-bottom:22px;}
.login-logo h1{font-size:22px;font-weight:700;font-style:italic;color:#fff;margin-bottom:4px;}
.login-logo p{font-size:10px;letter-spacing:3px;color:var(--text-muted);text-transform:uppercase;}
.login-tabs{display:flex;margin-bottom:20px;border-bottom:1px solid rgba(255,255,255,.14);}
.login-tab{flex:1;padding:9px;text-align:center;font-size:13px;cursor:pointer;color:var(--text-muted);border-bottom:2px solid transparent;transition:color .15s,border-color .15s;margin-bottom:-1px;user-select:none;}
.login-tab:hover{color:rgba(255,255,255,.75);}
.login-tab.active{color:var(--accent);border-bottom-color:var(--accent);}
.form-panel{display:none;}
.form-panel.active{display:block;animation:fadeIn .18s ease;}
@keyframes fadeIn{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}
.form-group{margin-bottom:14px;}
.form-group label{display:block;font-size:11.5px;color:var(--text-dim);margin-bottom:5px;font-weight:600;letter-spacing:.5px;}
.form-input{width:100%;padding:9px 12px;background:rgba(255,255,255,.08);border:1px solid rgba(100,160,255,.30);border-radius:4px;color:#fff;font-size:13px;font-family:var(--serif);outline:none;transition:border-color .15s,background .15s,box-shadow .15s;}
.form-input:focus{border-color:rgba(79,195,247,.65);background:rgba(79,195,247,.07);box-shadow:0 0 0 3px rgba(79,195,247,.10);}
.form-input::placeholder{color:rgba(255,255,255,.25);}
.error-msg{min-height:18px;font-size:12px;color:#ff8080;text-align:center;margin-bottom:10px;}
.btn-primary{width:100%;padding:11px;margin-top:4px;background:linear-gradient(180deg,#4a9af0 0%,#1a68cc 50%,#1050b8 100%);border:1px solid rgba(0,50,170,.55);border-radius:4px;color:#fff;font-size:14px;font-weight:700;font-family:var(--serif);cursor:pointer;box-shadow:inset 0 1px 0 rgba(255,255,255,.35),0 2px 8px rgba(0,60,200,.40);transition:filter .15s,transform .12s;}
.btn-primary:hover:not(:disabled){filter:brightness(1.14);transform:translateY(-1px);}
.btn-primary:active:not(:disabled){transform:translateY(1px);}
.btn-primary:disabled{opacity:.55;cursor:not-allowed;transform:none;}
.login-footer{text-align:center;margin-top:14px;font-size:12px;color:var(--text-muted);}
.btn-link{background:none;border:none;color:var(--accent);cursor:pointer;font-size:12px;font-family:var(--serif);padding:0 2px;text-decoration:underline;}
.btn-link:hover{color:#81d4fa;}
#loadingOverlay{display:none;position:fixed;inset:0;z-index:9999;background:rgba(0,6,30,.75);backdrop-filter:blur(8px);align-items:center;justify-content:center;flex-direction:column;gap:14px;color:var(--text-dim);font-size:14px;font-style:italic;}
#loadingOverlay.show{display:flex;}
.spinner{width:36px;height:36px;border:3px solid rgba(255,255,255,.12);border-top-color:var(--accent);border-radius:50%;animation:spin .8s linear infinite;}
@keyframes spin{to{transform:rotate(360deg)}}