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

body {
    background: linear-gradient(135deg, #0f2027, #203a43, #2c5364);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.login-container {
    width: 100%;
    padding: 20px;
}

.login-card {
    background: #111;
    max-width: 380px;
    margin: auto;
    padding: 30px;
    border-radius: 18px;
    text-align: center;
    box-shadow: 0 0 40px rgba(0,0,0,.6);
}

.logo {
    width: 90px;
    margin-bottom: 10px;
}

h1 {
    color: #e6da39;
    font-size: 24px;
}

.subtitle {
    color: #aaa;
    font-size: 14px;
    margin-bottom: 20px;
}

.input-group {
    display: flex;
    align-items: center;
    background: #1e1e1e;
    border-radius: 10px;
    padding: 12px;
    margin-bottom: 15px;
}

.input-group i {
    color: #e6da39;
    margin-right: 10px;
}

.input-group input {
    background: none;
    border: none;
    outline: none;
    color: #fff;
    width: 100%;
    font-size: 15px;
}

.btn-login {
    width: 100%;
    background: linear-gradient(135deg, #fac519, #ded77a);
    border: none;
    padding: 14px;
    border-radius: 12px;
    font-weight: bold;
    font-size: 15px;
    cursor: pointer;
    margin-top: 10px;
}

.btn-login:hover {
    opacity: .9;
}

.alert-error {
    background: #ff4d4d;
    color: #fff;
    padding: 10px;
    border-radius: 10px;
    margin-bottom: 15px;
    font-size: 14px;
}

.footer {
    display: block;
    margin-top: 20px;
    font-size: 12px;
    color: #666;
}

/* MOBILE */
@media (max-width: 480px) {
    .login-card {
        padding: 25px 20px;
    }
}