* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    min-height: 100vh;
    background: url('../img/background-image-admin.png') center/cover no-repeat;
    position: relative;
}

body::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.1);
}

header {
    position: relative;
    z-index: 10;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 40px;
    color: white;
}

.header-admin {
    backdrop-filter: blur(35px);
    -webkit-backdrop-filter: blur(35px);
}

.header-logo {
    max-width: 200px;
    height: auto;
}

.admin-label {
    font-size: 14px;
    letter-spacing: 1px;
    font-weight: 600;
    background: #ff8c00;
    color: white;
    text-decoration: none;
    transition: all 0.3s;
    padding: 10px 20px;
    border-radius: 25px;
    display: inline-block;
}

.admin-label:hover {
    background: #ff8c00;
    border-color: #ff8c00;
    transform: scale(1.05);
}

main {
    position: relative;
    z-index: 10;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: calc(100vh - 100px);
    padding: 20px;
}

.login-card {
    background: rgba(255, 255, 255, 0.65);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 40px;
    max-width: 450px;
    width: 100%;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.card-logo {
    text-align: center;
    margin-bottom: 30px;
}

.card-logo img {
    max-width: 280px;
    height: auto;
}

.form-group {
    margin-bottom: 20px;
}

label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #333;
    font-size: 14px;
}

input[type="text"],
input[type="password"] {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 14px;
    transition: border-color 0.3s;
}

input[type="text"]:focus,
input[type="password"]:focus {
    outline: none;
    border-color: #ff8c00;
}

input::placeholder {
    color: #999;
}

.btn-submit {
    width: 100%;
    padding: 14px;
    background: #ff8c00;
    color: white;
    border: none;
    border-radius: 50px;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    transition: background 0.3s;
    margin-top: 10px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.btn-submit:hover {
    background: #ff7700;
}

.btn-back {
    position: absolute;
    bottom: 40px;
    left: 40px;
    z-index: 10;
    padding: 12px 30px;
    background: #ff8c00;
    color: white;
    border: none;
    border-radius: 50px;
    font-size: 14px;
    font-weight: bold;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    transition: background 0.3s;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.btn-back:hover {
    background: #ff7700;
}

.btn-back svg {
    width: 20px;
    height: 20px;
}

@media (max-width: 768px) {
    header {
        padding: 15px 20px;
    }

    .header-logo {
        max-width: 150px;
    }

    .login-card {
        padding: 30px 20px;
    }

    .btn-back {
        bottom: 20px;
        left: 20px;
    }
}