body {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    padding: 10px;
    margin: 0;
    box-sizing: border-box;
}
* {
    box-sizing: border-box;
}
.login-container {
    max-width: 450px;
    width: 100%;
    padding: 10px;
}
.login-card {
    background: white;
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
    overflow: hidden;
}
.login-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 40px 30px;
    text-align: center;
}
.login-header h2 {
    margin: 0;
    font-weight: 600;
    font-size: 28px;
    word-wrap: break-word;
}
.login-header p {
    margin: 10px 0 0 0;
    opacity: 0.9;
    font-size: 14px;
}
.login-body {
    padding: 40px 30px;
}
.form-floating {
    margin-bottom: 20px;
}
.form-control:focus {
    border-color: #667eea;
    box-shadow: 0 0 0 0.25rem rgba(102, 126, 234, 0.25);
}
.btn-login {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border: none;
    padding: 12px;
    font-weight: 600;
    font-size: 16px;
    border-radius: 10px;
    transition: transform 0.2s, box-shadow 0.2s;
}
.btn-login:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}
.btn-login:active {
    transform: translateY(0);
}
.input-icon {
    position: relative;
}
.input-icon i {
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    color: #6c757d;
    z-index: 10;
    pointer-events: none;
}
.input-icon .form-control {
    padding-left: 50px;
    padding-right: 15px;
}
.input-icon label {
    left: 50px;
    padding-left: 0;
}
.input-icon .form-control:focus ~ label,
.input-icon .form-control:not(:placeholder-shown) ~ label {
    left: 50px;
    transform: scale(0.85) translateY(-0.5rem) translateX(0.15rem);
}

/* Медиа-запросы для мобильных устройств */
@media (max-width: 576px) {
    body {
        padding: 5px;
    }
    .login-container {
        padding: 5px;
        max-width: 100%;
    }
    .login-header {
        padding: 30px 20px;
    }
    .login-header h2 {
        font-size: 24px;
    }
    .login-body {
        padding: 30px 20px;
    }
    .input-icon .form-control {
        padding-left: 45px;
        font-size: 16px; /* Предотвращает зум на iOS */
    }
    .input-icon i {
        left: 12px;
    }
    .input-icon label {
        left: 45px;
        font-size: 14px;
    }
    .input-icon .form-control:focus ~ label,
    .input-icon .form-control:not(:placeholder-shown) ~ label {
        left: 45px;
    }
    .btn-login {
        padding: 14px;
        font-size: 16px;
    }
}

@media (max-width: 400px) {
    .login-header {
        padding: 25px 15px;
    }
    .login-header h2 {
        font-size: 22px;
    }
    .login-body {
        padding: 25px 15px;
    }
    .form-floating {
        margin-bottom: 15px;
    }
}