* { margin: 0; padding: 0; box-sizing: border-box; font-family: 'Segoe UI', sans-serif; }

body {
    background: linear-gradient(135deg, #20e2ff, #ad12e3);
    height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.brand { color: white; font-size: 2.5rem; font-weight: 800; margin-bottom: 20px; }

.login-box {
    background: white;
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.2);
    width: 100%;
    max-width: 420px;
}

.title { text-align: center; font-weight: 700; color: #333; margin-bottom: 25px; }

.group { margin-bottom: 15px; }
.label { font-size: 0.85rem; font-weight: 600; color: #666; display: block; margin-bottom: 5px; }
.inp { 
    width: 100%; height: 45px; border-radius: 8px; border: 1px solid #ddd; 
    padding: 0 15px; outline: none; transition: 0.3s;
}
.inp:focus { border-color: #31a9e1; box-shadow: 0 0 5px rgba(49,169,225,0.2); }

.btn-main {
    width: 100%; height: 50px; background: #31a9e1; color: white;
    border: none; border-radius: 8px; font-weight: 700; cursor: pointer;
    text-transform: uppercase; margin-top: 10px;
}
.btn-main:hover { background: #2691c2; }

.social-grp { display: flex; gap: 10px; margin-top: 20px; }
.btn-sn { 
    flex: 1; height: 40px; border: none; border-radius: 6px; 
    color: white; font-weight: 600; cursor: pointer; font-size: 0.9rem;
}
.gg { background: #df4b3b; }
.fb { background: #3b5998; }

.err { color: #d9534f; background: #fdf7f7; padding: 10px; border-radius: 6px; 
       text-align: center; font-size: 0.85rem; margin-top: 15px; border: 1px solid #ebccd1; }
.footer { text-align: center; margin-top: 25px; }
.link-qmk { color: #d9534f; font-size: 0.85rem; text-decoration: none; font-weight: 600; }
.notice { display: none; background: #fff3cd; padding: 10px; border-radius: 6px; 
          font-size: 0.8rem; margin-top: 10px; border-left: 4px solid #ffc107; }